NOAA SWPC Alerts, Watches and Warnings

The National Oceanic and Atmospheric Administration Space Weather Prediction Center (NOAA SWPC) is the official space weather government agency from the United States that provides alerts, watches and warning for space weather disturbances. Below you will find the latest space weather alerts, watches and warnings issued by the NOAA SWPC.

Monday, 27 March 2017

16:34 UTC

Space Weather Message Code: ALTK05
Serial Number: 1081
Issue Time: 2017 Mar 27 1634 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 27 1633 UTC
Synoptic Period: 1500-1800 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:42 UTC

Space Weather Message Code: WARK04
Serial Number: 3178
Issue Time: 2017 Mar 27 1442 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3177
Valid From: 2017 Mar 27 0350 UTC
Now Valid Until: 2017 Mar 28 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:42 UTC

Space Weather Message Code: WARK05
Serial Number: 1328
Issue Time: 2017 Mar 27 1442 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1327
Valid From: 2017 Mar 27 0520 UTC
Now Valid Until: 2017 Mar 28 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:42 UTC

Space Weather Message Code: WARK06
Serial Number: 373
Issue Time: 2017 Mar 27 1442 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 372
Valid From: 2017 Mar 27 1019 UTC
Now Valid Until: 2017 Mar 27 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

14:09 UTC

Space Weather Message Code: ALTK05
Serial Number: 1080
Issue Time: 2017 Mar 27 1409 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 27 1408 UTC
Synoptic Period: 1200-1500 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:24 UTC

Space Weather Message Code: ALTK06
Serial Number: 425
Issue Time: 2017 Mar 27 1024 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2017 Mar 27 1024 UTC
Synoptic Period: 0900-1200 UTC
 
Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

10:22 UTC

Space Weather Message Code: WARK06
Serial Number: 372
Issue Time: 2017 Mar 27 1022 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2017 Mar 27 1019 UTC
Valid To: 2017 Mar 27 1459 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

10:07 UTC

Space Weather Message Code: ALTK05
Serial Number: 1079
Issue Time: 2017 Mar 27 1007 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 27 1005 UTC
Synoptic Period: 0900-1200 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

07:40 UTC

Space Weather Message Code: ALTK05
Serial Number: 1078
Issue Time: 2017 Mar 27 0740 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 27 0735 UTC
Synoptic Period: 0600-0900 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:59 UTC

Space Weather Message Code: ALTK05
Serial Number: 1077
Issue Time: 2017 Mar 27 0559 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 27 0559 UTC
Synoptic Period: 0300-0600 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:20 UTC

Space Weather Message Code: WARK05
Serial Number: 1327
Issue Time: 2017 Mar 27 0520 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 27 0520 UTC
Valid To: 2017 Mar 27 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:00 UTC

Space Weather Message Code: ALTK04
Serial Number: 1966
Issue Time: 2017 Mar 27 0500 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 27 0459 UTC
Synoptic Period: 0300-0600 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

03:51 UTC

Space Weather Message Code: WARK04
Serial Number: 3177
Issue Time: 2017 Mar 27 0351 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 27 0350 UTC
Valid To: 2017 Mar 27 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Sunday, 26 March 2017

19:02 UTC

Space Weather Message Code: WATA30
Serial Number: 151
Issue Time: 2017 Mar 26 1902 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Mar 27:  G1 (Minor)   Mar 28:  G2 (Moderate)   Mar 29:  G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

05:02 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2570
Issue Time: 2017 Mar 26 0502 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2569
Begin Time: 2017 Mar 22 1740 UTC
Yesterday Maximum 2MeV Flux: 8822 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Saturday, 25 March 2017

15:15 UTC

Space Weather Message Code: WATA30
Serial Number: 150
Issue Time: 2017 Mar 25 1515 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Mar 26:  None (Below G1)   Mar 27:  G1 (Minor)   Mar 28:  G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2569
Issue Time: 2017 Mar 25 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2568
Begin Time: 2017 Mar 22 1740 UTC
Yesterday Maximum 2MeV Flux: 11529 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Friday, 24 March 2017

14:25 UTC

Space Weather Message Code: WATA20
Serial Number: 778
Issue Time: 2017 Mar 24 1425 UTC

CANCEL WATCH: Geomagnetic Storm Category G1 Predicted
Cancel Serial Number: 777
Original Issue Time: 2017 Mar 23 2000 UTC

Comment: G1 (Minor) geomagnetic storms conditions are no longer anticipated.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:36 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2568
Issue Time: 2017 Mar 24 0536 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2567
Begin Time: 2017 Mar 22 1740 UTC
Yesterday Maximum 2MeV Flux: 19136 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Thursday, 23 March 2017

20:00 UTC

Space Weather Message Code: WATA20
Serial Number: 777
Issue Time: 2017 Mar 23 2000 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 24:  G1 (Minor)   Mar 25:  None (Below G1)   Mar 26:  None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3176
Issue Time: 2017 Mar 23 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3175
Valid From: 2017 Mar 21 0605 UTC
Now Valid Until: 2017 Mar 23 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2567
Issue Time: 2017 Mar 23 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2566
Begin Time: 2017 Mar 22 1740 UTC
Yesterday Maximum 2MeV Flux: 3546 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

00:04 UTC

Space Weather Message Code: ALTK05
Serial Number: 1076
Issue Time: 2017 Mar 23 0004 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 22 2359 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Wednesday, 22 March 2017

20:39 UTC

Space Weather Message Code: WARK05
Serial Number: 1326
Issue Time: 2017 Mar 22 2039 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1325
Valid From: 2017 Mar 21 1608 UTC
Now Valid Until: 2017 Mar 23 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2566
Issue Time: 2017 Mar 22 1759 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2017 Mar 22 1740 UTC
Station: GOES13
 

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

14:47 UTC

Space Weather Message Code: WARK04
Serial Number: 3175
Issue Time: 2017 Mar 22 1447 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3174
Valid From: 2017 Mar 21 0605 UTC
Now Valid Until: 2017 Mar 23 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:47 UTC

Space Weather Message Code: WARK05
Serial Number: 1325
Issue Time: 2017 Mar 22 1447 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1324
Valid From: 2017 Mar 21 1608 UTC
Now Valid Until: 2017 Mar 22 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:55 UTC

Space Weather Message Code: WARK05
Serial Number: 1324
Issue Time: 2017 Mar 22 1055 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1323
Valid From: 2017 Mar 21 1608 UTC
Now Valid Until: 2017 Mar 22 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3174
Issue Time: 2017 Mar 22 1055 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3173
Valid From: 2017 Mar 21 0605 UTC
Now Valid Until: 2017 Mar 22 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

02:52 UTC

Space Weather Message Code: WARK04
Serial Number: 3173
Issue Time: 2017 Mar 22 0252 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3172
Valid From: 2017 Mar 21 0605 UTC
Now Valid Until: 2017 Mar 22 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

02:52 UTC

Space Weather Message Code: WARK05
Serial Number: 1323
Issue Time: 2017 Mar 22 0252 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1322
Valid From: 2017 Mar 21 1608 UTC
Now Valid Until: 2017 Mar 22 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Tuesday, 21 March 2017

20:16 UTC

Space Weather Message Code: WARK06
Serial Number: 371
Issue Time: 2017 Mar 21 2016 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2017 Mar 21 2015 UTC
Valid To: 2017 Mar 21 2359 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:16 UTC

Space Weather Message Code: WARK05
Serial Number: 1322
Issue Time: 2017 Mar 21 2016 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1321
Valid From: 2017 Mar 21 1608 UTC
Now Valid Until: 2017 Mar 22 0300 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:28 UTC

Space Weather Message Code: ALTK05
Serial Number: 1075
Issue Time: 2017 Mar 21 1928 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 21 1927 UTC
Synoptic Period: 1800-2100 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:14 UTC

Space Weather Message Code: ALTK05
Serial Number: 1074
Issue Time: 2017 Mar 21 1614 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 21 1612 UTC
Synoptic Period: 1500-1800 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

16:07 UTC

Space Weather Message Code: WARK05
Serial Number: 1321
Issue Time: 2017 Mar 21 1607 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 21 1608 UTC
Valid To: 2017 Mar 21 2100 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:29 UTC

Space Weather Message Code: WATA20
Serial Number: 776
Issue Time: 2017 Mar 21 1429 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 22:  G1 (Minor)   Mar 23:  G1 (Minor)   Mar 24:  None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:18 UTC

Space Weather Message Code: WARK04
Serial Number: 3172
Issue Time: 2017 Mar 21 1418 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3171
Valid From: 2017 Mar 21 0605 UTC
Now Valid Until: 2017 Mar 22 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:02 UTC

Space Weather Message Code: ALTK04
Serial Number: 1965
Issue Time: 2017 Mar 21 0802 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 21 0801 UTC
Synoptic Period: 0600-0900 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

06:21 UTC

Space Weather Message Code: WARK05
Serial Number: 1320
Issue Time: 2017 Mar 21 0621 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 21 0621 UTC
Valid To: 2017 Mar 21 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

06:05 UTC

Space Weather Message Code: WARK04
Serial Number: 3171
Issue Time: 2017 Mar 21 0605 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 21 0605 UTC
Valid To: 2017 Mar 21 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Monday, 20 March 2017

19:50 UTC

Space Weather Message Code: WATA20
Serial Number: 775
Issue Time: 2017 Mar 20 1950 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 21:  None (Below G1)   Mar 22:  None (Below G1)   Mar 23:  G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Wednesday, 15 March 2017

06:12 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2565
Issue Time: 2017 Mar 15 0612 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2564
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 8796 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Tuesday, 14 March 2017

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2564
Issue Time: 2017 Mar 14 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2563
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 3433 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Monday, 13 March 2017

11:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2563
Issue Time: 2017 Mar 13 1100 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2562
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 5089 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Sunday, 12 March 2017

08:46 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2562
Issue Time: 2017 Mar 12 0846 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2561
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 14629 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

04:08 UTC

Space Weather Message Code: ALTK04
Serial Number: 1964
Issue Time: 2017 Mar 12 0408 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 12 0402 UTC
Synoptic Period: 0300-0600 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

03:54 UTC

Space Weather Message Code: WARK04
Serial Number: 3170
Issue Time: 2017 Mar 12 0354 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 12 0353 UTC
Valid To: 2017 Mar 12 1300 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Saturday, 11 March 2017

05:17 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2561
Issue Time: 2017 Mar 11 0517 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2560
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 12581 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Friday, 10 March 2017

08:26 UTC

Space Weather Message Code: ALTK04
Serial Number: 1963
Issue Time: 2017 Mar 10 0826 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 10 0825 UTC
Synoptic Period: 0600-0900 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:06 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2560
Issue Time: 2017 Mar 10 0806 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2559
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 28218 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

07:31 UTC

Space Weather Message Code: WARK04
Serial Number: 3169
Issue Time: 2017 Mar 10 0731 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 10 0730 UTC
Valid To: 2017 Mar 10 1300 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Thursday, 9 March 2017

17:56 UTC

Space Weather Message Code: WARK04
Serial Number: 3168
Issue Time: 2017 Mar 09 1756 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3167
Valid From: 2017 Mar 08 2044 UTC
Now Valid Until: 2017 Mar 09 2359 UTC
Warning Condition: persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

11:49 UTC

Space Weather Message Code: WARK04
Serial Number: 3167
Issue Time: 2017 Mar 09 1149 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3166
Valid From: 2017 Mar 08 2044 UTC
Now Valid Until: 2017 Mar 09 1800 UTC
Warning Condition: persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:50 UTC

Space Weather Message Code: WARK04
Serial Number: 3166
Issue Time: 2017 Mar 09 0550 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3165
Valid From: 2017 Mar 08 2044 UTC
Now Valid Until: 2017 Mar 08 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2559
Issue Time: 2017 Mar 09 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2558
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 28637 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Wednesday, 8 March 2017

23:52 UTC

Space Weather Message Code: ALTK04
Serial Number: 1962
Issue Time: 2017 Mar 08 2352 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 08 2351 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

23:26 UTC

Space Weather Message Code: WARK04
Serial Number: 3165
Issue Time: 2017 Mar 08 2326 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3164
Valid From: 2017 Mar 08 2044 UTC
Now Valid Until: 2017 Mar 09 0600 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

20:44 UTC

Space Weather Message Code: WARK04
Serial Number: 3164
Issue Time: 2017 Mar 08 2044 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 08 2044 UTC
Valid To: 2017 Mar 08 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2558
Issue Time: 2017 Mar 08 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2557
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 31176 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Tuesday, 7 March 2017

23:52 UTC

Space Weather Message Code: WARK04
Serial Number: 3163
Issue Time: 2017 Mar 07 2352 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3162
Valid From: 2017 Mar 06 1325 UTC
Now Valid Until: 2017 Feb 08 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

17:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3162
Issue Time: 2017 Mar 07 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3161
Valid From: 2017 Mar 06 1325 UTC
Now Valid Until: 2017 Mar 07 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

11:45 UTC

Space Weather Message Code: WARK04
Serial Number: 3161
Issue Time: 2017 Mar 07 1145 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3160
Valid From: 2017 Mar 06 1325 UTC
Now Valid Until: 2017 Mar 07 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:42 UTC

Space Weather Message Code: WARK04
Serial Number: 3160
Issue Time: 2017 Mar 07 0542 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3159
Valid From: 2017 Mar 06 1325 UTC
Now Valid Until: 2017 Mar 07 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:03 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2557
Issue Time: 2017 Mar 07 0503 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2556
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 27935 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Monday, 6 March 2017

20:00 UTC

Space Weather Message Code: ALTK05
Serial Number: 1073
Issue Time: 2017 Mar 06 2000 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 06 2000 UTC
Synoptic Period: 1800-2100 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

19:52 UTC

Space Weather Message Code: WARK05
Serial Number: 1319
Issue Time: 2017 Mar 06 1952 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 06 1952 UTC
Valid To: 2017 Mar 06 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

17:26 UTC

Space Weather Message Code: WARK04
Serial Number: 3159
Issue Time: 2017 Mar 06 1726 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3158
Valid From: 2017 Mar 06 1325 UTC
Now Valid Until: 2017 Mar 07 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:54 UTC

Space Weather Message Code: ALTK04
Serial Number: 1961
Issue Time: 2017 Mar 06 1454 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 06 1453 UTC
Synoptic Period: 1200-1500 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

13:24 UTC

Space Weather Message Code: WARK04
Serial Number: 3158
Issue Time: 2017 Mar 06 1324 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 06 1325 UTC
Valid To: 2017 Mar 06 1800 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2556
Issue Time: 2017 Mar 06 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2555
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 29715 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

02:14 UTC

Space Weather Message Code: ALTK04
Serial Number: 1960
Issue Time: 2017 Mar 06 0214 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 06 0213 UTC
Synoptic Period: 0000-0300 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

02:10 UTC

Space Weather Message Code: WARK04
Serial Number: 3157
Issue Time: 2017 Mar 06 0210 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 06 0210 UTC
Valid To: 2017 Mar 06 1200 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Sunday, 5 March 2017

20:22 UTC

Space Weather Message Code: ALTK04
Serial Number: 1959
Issue Time: 2017 Mar 05 2022 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 05 2022 UTC
Synoptic Period: 1800-2100 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

19:39 UTC

Space Weather Message Code: WARK04
Serial Number: 3156
Issue Time: 2017 Mar 05 1939 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 05 1938 UTC
Valid To: 2017 Mar 05 2359 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:58 UTC

Space Weather Message Code: WATA20
Serial Number: 774
Issue Time: 2017 Mar 05 0558 UTC

CANCEL WATCH: Geomagnetic Storm Category G1 Predicted
Cancel Serial Number: 773
Original Issue Time: 2017 Mar 04 2203 UTC

Comment: G1 Watch conditions are no longer present.

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2555
Issue Time: 2017 Mar 05 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2554
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 22406 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Saturday, 4 March 2017

23:01 UTC

Space Weather Message Code: WARK05
Serial Number: 1318
Issue Time: 2017 Mar 04 2301 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 04 2301 UTC
Valid To: 2017 Mar 05 0300 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:01 UTC

Space Weather Message Code: WARK04
Serial Number: 3155
Issue Time: 2017 Mar 04 2301 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3154
Valid From: 2017 Mar 04 2146 UTC
Now Valid Until: 2017 Mar 05 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

22:03 UTC

Space Weather Message Code: WATA20
Serial Number: 773
Issue Time: 2017 Mar 04 2203 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Mar 05:  G1 (Minor)   Mar 06:  None (Below G1)   Mar 07:  None (Below G1)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

21:59 UTC

Space Weather Message Code: ALTK04
Serial Number: 1958
Issue Time: 2017 Mar 04 2159 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 04 2159 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

21:46 UTC

Space Weather Message Code: WARK04
Serial Number: 3154
Issue Time: 2017 Mar 04 2146 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 04 2146 UTC
Valid To: 2017 Mar 05 0300 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

06:00 UTC

Space Weather Message Code: ALTK05
Serial Number: 1072
Issue Time: 2017 Mar 04 0600 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 04 0559 UTC
Synoptic Period: 0300-0600 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:02 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2554
Issue Time: 2017 Mar 04 0502 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2553
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 19039 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

02:21 UTC

Space Weather Message Code: ALTK05
Serial Number: 1071
Issue Time: 2017 Mar 04 0221 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 04 0220 UTC
Synoptic Period: 0000-0300 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

02:14 UTC

Space Weather Message Code: WARK05
Serial Number: 1317
Issue Time: 2017 Mar 04 0214 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 04 0215 UTC
Valid To: 2017 Mar 04 1159 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Friday, 3 March 2017

14:41 UTC

Space Weather Message Code: WARK04
Serial Number: 3153
Issue Time: 2017 Mar 03 1441 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3152
Valid From: 2017 Mar 01 0131 UTC
Now Valid Until: 2017 Mar 04 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:41 UTC

Space Weather Message Code: WARK05
Serial Number: 1316
Issue Time: 2017 Mar 03 1441 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1315
Valid From: 2017 Mar 03 0841 UTC
Now Valid Until: 2017 Mar 03 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:44 UTC

Space Weather Message Code: ALTK05
Serial Number: 1070
Issue Time: 2017 Mar 03 0844 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 03 0844 UTC
Synoptic Period: 0600-0900 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:42 UTC

Space Weather Message Code: WARK05
Serial Number: 1315
Issue Time: 2017 Mar 03 0842 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 03 0841 UTC
Valid To: 2017 Mar 03 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3152
Issue Time: 2017 Mar 03 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3151
Valid From: 2017 Mar 01 0131 UTC
Now Valid Until: 2017 Mar 03 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2553
Issue Time: 2017 Mar 03 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2552
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 22916 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Thursday, 2 March 2017

14:30 UTC

Space Weather Message Code: WARK04
Serial Number: 3151
Issue Time: 2017 Mar 02 1430 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3150
Valid From: 2017 Mar 01 0131 UTC
Now Valid Until: 2017 Mar 03 0600 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

14:30 UTC

Space Weather Message Code: WARK05
Serial Number: 1314
Issue Time: 2017 Mar 02 1430 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1313
Valid From: 2017 Mar 01 0850 UTC
Now Valid Until: 2017 Mar 02 2100 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:13 UTC

Space Weather Message Code: ALTK05
Serial Number: 1069
Issue Time: 2017 Mar 02 1413 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 02 1412 UTC
Synoptic Period: 1200-1500 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:56 UTC

Space Weather Message Code: ALTK05
Serial Number: 1068
Issue Time: 2017 Mar 02 1056 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 02 1055 UTC
Synoptic Period: 0900-1200 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

09:10 UTC

Space Weather Message Code: WARK04
Serial Number: 3150
Issue Time: 2017 Mar 02 0910 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3149
Valid From: 2017 Mar 01 0131 UTC
Now Valid Until: 2017 Mar 02 1800 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:58 UTC

Space Weather Message Code: WARK05
Serial Number: 1313
Issue Time: 2017 Mar 02 0858 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1312
Valid From: 2017 Mar 01 0850 UTC
Now Valid Until: 2017 Mar 02 1500 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2552
Issue Time: 2017 Mar 02 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2551
Begin Time: 2017 Mar 02 0440 UTC
Yesterday Maximum 2MeV Flux: 1429 pfu

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

04:58 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2551
Issue Time: 2017 Mar 02 0458 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2017 Mar 02 0440 UTC
Station: GOES-13
 

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

00:57 UTC

Space Weather Message Code: ALTK05
Serial Number: 1067
Issue Time: 2017 Mar 02 0057 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 02 0057 UTC
Synoptic Period: 0000-0300 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Wednesday, 1 March 2017

23:05 UTC

Space Weather Message Code: WARK05
Serial Number: 1312
Issue Time: 2017 Mar 01 2305 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1311
Valid From: 2017 Mar 01 0850 UTC
Now Valid Until: 2017 Mar 02 0900 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

23:05 UTC

Space Weather Message Code: WARK06
Serial Number: 370
Issue Time: 2017 Mar 01 2305 UTC

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 369
Valid From: 2017 Mar 01 2031 UTC
Now Valid Until: 2017 Mar 02 0400 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

23:05 UTC

Space Weather Message Code: ALTK06
Serial Number: 424
Issue Time: 2017 Mar 01 2305 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2017 Mar 01 2300 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

22:39 UTC

Space Weather Message Code: ALTK05
Serial Number: 1066
Issue Time: 2017 Mar 01 2239 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 01 2238 UTC
Synoptic Period: 2100-2400 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

20:31 UTC

Space Weather Message Code: WARK06
Serial Number: 369
Issue Time: 2017 Mar 01 2031 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2017 Mar 01 2031 UTC
Valid To: 2017 Mar 01 2359 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

20:10 UTC

Space Weather Message Code: ALTK05
Serial Number: 1065
Issue Time: 2017 Mar 01 2010 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 01 2009 UTC
Synoptic Period: 1800-2100 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

15:01 UTC

Space Weather Message Code: ALTK05
Serial Number: 1064
Issue Time: 2017 Mar 01 1501 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 01 1459 UTC
Synoptic Period: 1200-1500 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:33 UTC

Space Weather Message Code: WARK05
Serial Number: 1311
Issue Time: 2017 Mar 01 1433 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1310
Valid From: 2017 Mar 01 0850 UTC
Now Valid Until: 2017 Mar 01 2359 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

14:33 UTC

Space Weather Message Code: WARK04
Serial Number: 3149
Issue Time: 2017 Mar 01 1433 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3148
Valid From: 2017 Mar 01 0131 UTC
Now Valid Until: 2017 Mar 02 1200 UTC
Warning Condition: Persistence

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

10:36 UTC

Space Weather Message Code: ALTK05
Serial Number: 1063
Issue Time: 2017 Mar 01 1036 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2017 Mar 01 1036 UTC
Synoptic Period: 0900-1200 UTC
 
Active Warning: Yes
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

10:16 UTC

Space Weather Message Code: ALTK04
Serial Number: 1957
Issue Time: 2017 Mar 01 1016 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Mar 01 1016 UTC
Synoptic Period: 0900-1200 UTC
 
Active Warning: Yes

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

08:50 UTC

Space Weather Message Code: WARK05
Serial Number: 1310
Issue Time: 2017 Mar 01 0850 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Mar 01 0850 UTC
Valid To: 2017 Mar 01 1500 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

08:50 UTC

Space Weather Message Code: WARK04
Serial Number: 3148
Issue Time: 2017 Mar 01 0850 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3147
Valid From: 2017 Mar 01 0131 UTC
Now Valid Until: 2017 Mar 01 2100 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

01:32 UTC

Space Weather Message Code: WARK04
Serial Number: 3147
Issue Time: 2017 Mar 01 0132 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Mar 01 0131 UTC
Valid To: 2017 Mar 01 1500 UTC
Warning Condition: Onset

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Monday, 27 February 2017

08:30 UTC

Space Weather Message Code: WATA20
Serial Number: 772
Issue Time: 2017 Feb 27 0830 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 28:  None (Below G1)   Mar 01:  G1 (Minor)   Mar 02:  G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Sunday, 26 February 2017

21:49 UTC

Space Weather Message Code: WATA20
Serial Number: 771
Issue Time: 2017 Feb 26 2149 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Feb 27:  None (Below G1)   Feb 28:  None (Below G1)   Mar 01:  G1 (Minor)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation

Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Current data suggest that it is not possible to see aurora now at middle latitudes
G2 - Moderate geomagnetic storm
Observed Kp: 6-
The solar wind speed is currently moderately high (618.7 km/sec.)

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 20% 30%
Middle latitude 25% 10%
Predicted Kp max 5
Solar activity
M-class solar flare 1%
X-class solar flare 1%
C1.6
Moon phase
New Moon

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Last X-flare:2015/05/05X2.7
Last M-flare:2016/11/29M1.2
Last geomagnetic storm:2017/03/22Kp5 (G1)
Number of spotless days in 2017:27
Last spotless day:2017/03/20

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