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.

Tuesday, 17 January 2017

14:36 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2524
Issue Time: 2017 Jan 17 1436 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2523
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 3085 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, 16 January 2017

22:13 UTC

Space Weather Message Code: WATA20
Serial Number: 765
Issue Time: 2017 Jan 16 2213 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 17:  None (Below G1)   Jan 18:  G1 (Minor)   Jan 19:  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.

13:52 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2523
Issue Time: 2017 Jan 16 1352 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2522
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 3432 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, 15 January 2017

16:55 UTC

Space Weather Message Code: WATA20
Serial Number: 764
Issue Time: 2017 Jan 15 1655 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 16:  None (Below G1)   Jan 17:  None (Below G1)   Jan 18:  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.

10:18 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2522
Issue Time: 2017 Jan 15 1018 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2521
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 4185 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, 14 January 2017

07:59 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2521
Issue Time: 2017 Jan 14 0759 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2520
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 7917 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, 13 January 2017

09:52 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2520
Issue Time: 2017 Jan 13 0952 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2519
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 7627 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, 12 January 2017

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2519
Issue Time: 2017 Jan 12 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2518
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 8688 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, 11 January 2017

06:11 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2518
Issue Time: 2017 Jan 11 0611 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2517
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 36708 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, 10 January 2017

17:44 UTC

Space Weather Message Code: WARK04
Serial Number: 3111
Issue Time: 2017 Jan 10 1744 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 10 1745 UTC
Valid To: 2017 Jan 11 0100 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: 2517
Issue Time: 2017 Jan 10 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2516
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 42125 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, 9 January 2017

23:54 UTC

Space Weather Message Code: WARK04
Serial Number: 3110
Issue Time: 2017 Jan 09 2354 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3109
Valid From: 2017 Jan 08 1840 UTC
Now Valid Until: 2017 Jan 10 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.

11:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3109
Issue Time: 2017 Jan 09 1155 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3108
Valid From: 2017 Jan 08 1840 UTC
Now Valid Until: 2017 Jan 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.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2516
Issue Time: 2017 Jan 09 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2515
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 25537 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, 8 January 2017

23:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3108
Issue Time: 2017 Jan 08 2355 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3107
Valid From: 2017 Jan 08 1840 UTC
Now Valid Until: 2017 Jan 09 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.

19:10 UTC

Space Weather Message Code: ALTK04
Serial Number: 1946
Issue Time: 2017 Jan 08 1910 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 08 1910 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.

18:41 UTC

Space Weather Message Code: WARK04
Serial Number: 3107
Issue Time: 2017 Jan 08 1841 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 08 1840 UTC
Valid To: 2017 Jan 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.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2515
Issue Time: 2017 Jan 08 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2514
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 22570 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, 7 January 2017

05:54 UTC

Space Weather Message Code: WARK04
Serial Number: 3106
Issue Time: 2017 Jan 07 0554 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3105
Valid From: 2017 Jan 04 1902 UTC
Now Valid Until: 2017 Jan 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.

05:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2514
Issue Time: 2017 Jan 07 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2513
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 8107 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, 6 January 2017

14:36 UTC

Space Weather Message Code: WARK05
Serial Number: 1298
Issue Time: 2017 Jan 06 1436 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1297
Valid From: 2017 Jan 05 2322 UTC
Now Valid Until: 2017 Jan 06 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.

14:36 UTC

Space Weather Message Code: WARK04
Serial Number: 3105
Issue Time: 2017 Jan 06 1436 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3104
Valid From: 2017 Jan 04 1902 UTC
Now Valid Until: 2017 Jan 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.

09:41 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2513
Issue Time: 2017 Jan 06 0941 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2512
Begin Time: 2017 Jan 05 1520 UTC
Yesterday Maximum 2MeV Flux: 1823 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.

05:49 UTC

Space Weather Message Code: WARK05
Serial Number: 1297
Issue Time: 2017 Jan 06 0549 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1296
Valid From: 2017 Jan 05 2322 UTC
Now Valid Until: 2017 Jan 06 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 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.

05:49 UTC

Space Weather Message Code: WARK04
Serial Number: 3104
Issue Time: 2017 Jan 06 0549 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3103
Valid From: 2017 Jan 04 1902 UTC
Now Valid Until: 2017 Jan 06 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.

Thursday, 5 January 2017

23:32 UTC

Space Weather Message Code: WARK04
Serial Number: 3103
Issue Time: 2017 Jan 05 2332 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3102
Valid From: 2017 Jan 04 1902 UTC
Now Valid Until: 2017 Jan 06 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.

23:22 UTC

Space Weather Message Code: WARK05
Serial Number: 1296
Issue Time: 2017 Jan 05 2322 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2017 Jan 05 2322 UTC
Valid To: 2017 Jan 06 0600 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.

21:20 UTC

Space Weather Message Code: WATA20
Serial Number: 763
Issue Time: 2017 Jan 05 2120 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 06:  G1 (Minor)   Jan 07:  None (Below G1)   Jan 08:  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.

17:53 UTC

Space Weather Message Code: WARK04
Serial Number: 3102
Issue Time: 2017 Jan 05 1753 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3101
Valid From: 2017 Jan 04 1902 UTC
Now Valid Until: 2017 Jan 06 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 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.

15:39 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2512
Issue Time: 2017 Jan 05 1539 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2017 Jan 05 1520 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.

02:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3101
Issue Time: 2017 Jan 05 0255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3100
Valid From: 2017 Jan 04 1902 UTC
Now Valid Until: 2017 Jan 05 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.

Wednesday, 4 January 2017

19:39 UTC

Space Weather Message Code: ALTK04
Serial Number: 1945
Issue Time: 2017 Jan 04 1939 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 04 1936 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.

19:01 UTC

Space Weather Message Code: WARK04
Serial Number: 3100
Issue Time: 2017 Jan 04 1901 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 04 1902 UTC
Valid To: 2017 Jan 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.

05:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3099
Issue Time: 2017 Jan 04 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3098
Valid From: 2017 Jan 03 0832 UTC
Now Valid Until: 2017 Jan 04 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.

Tuesday, 3 January 2017

17:49 UTC

Space Weather Message Code: WARK04
Serial Number: 3098
Issue Time: 2017 Jan 03 1749 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3097
Valid From: 2017 Jan 03 0832 UTC
Now Valid Until: 2017 Jan 04 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.

11:11 UTC

Space Weather Message Code: ALTK04
Serial Number: 1944
Issue Time: 2017 Jan 03 1111 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 03 1110 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.

08:31 UTC

Space Weather Message Code: WARK04
Serial Number: 3097
Issue Time: 2017 Jan 03 0831 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2017 Jan 03 0832 UTC
Valid To: 2017 Jan 03 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.

Monday, 2 January 2017

19:47 UTC

Space Weather Message Code: WATA20
Serial Number: 762
Issue Time: 2017 Jan 02 1947 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Jan 03:  None (Below G1)   Jan 04:  G1 (Minor)   Jan 05:  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, 1 January 2017

03:00 UTC

Space Weather Message Code: ALTK04
Serial Number: 1943
Issue Time: 2017 Jan 01 0300 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2017 Jan 01 0259 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.

Saturday, 31 December 2016

11:34 UTC

Space Weather Message Code: WARK04
Serial Number: 3096
Issue Time: 2016 Dec 31 1134 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2016 Dec 31 1133 UTC
Valid To: 2017 Jan 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.

05:58 UTC

Space Weather Message Code: WATA20
Serial Number: 761
Issue Time: 2016 Dec 31 0558 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Dec 31:  G1 (Minor)   Jan 01:  G1 (Minor)   Jan 02:  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.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2511
Issue Time: 2016 Dec 31 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2510
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 11343 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, 30 December 2016

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2510
Issue Time: 2016 Dec 30 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2509
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 15202 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, 29 December 2016

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2509
Issue Time: 2016 Dec 29 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2508
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 12392 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, 28 December 2016

21:00 UTC

Space Weather Message Code: WATA20
Serial Number: 760
Issue Time: 2016 Dec 28 2100 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Dec 29:  None (Below G1)   Dec 30:  None (Below G1)   Dec 31:  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.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2508
Issue Time: 2016 Dec 28 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2507
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 15954 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, 27 December 2016

05:05 UTC

Space Weather Message Code: WARK04
Serial Number: 3095
Issue Time: 2016 Dec 27 0505 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3094
Valid From: 2016 Dec 26 1455 UTC
Now Valid Until: 2016 Dec 27 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.

05:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2507
Issue Time: 2016 Dec 27 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2506
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 26143 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, 26 December 2016

21:14 UTC

Space Weather Message Code: WARK04
Serial Number: 3094
Issue Time: 2016 Dec 26 2114 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3093
Valid From: 2016 Dec 26 1455 UTC
Now Valid Until: 2016 Dec 27 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.

15:01 UTC

Space Weather Message Code: ALTK04
Serial Number: 1942
Issue Time: 2016 Dec 26 1501 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2016 Dec 26 1459 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.

14:56 UTC

Space Weather Message Code: WARK04
Serial Number: 3093
Issue Time: 2016 Dec 26 1456 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2016 Dec 26 1455 UTC
Valid To: 2016 Dec 26 2200 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: 2506
Issue Time: 2016 Dec 26 0501 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2505
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 25726 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.

02:04 UTC

Space Weather Message Code: ALTK05
Serial Number: 1057
Issue Time: 2016 Dec 26 0204 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2016 Dec 26 0204 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.

02:03 UTC

Space Weather Message Code: WARK04
Serial Number: 3092
Issue Time: 2016 Dec 26 0203 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3091
Valid From: 2016 Dec 25 0255 UTC
Now Valid Until: 2016 Dec 26 1400 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.

02:01 UTC

Space Weather Message Code: WARK05
Serial Number: 1295
Issue Time: 2016 Dec 26 0201 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2016 Dec 26 0200 UTC
Valid To: 2016 Dec 26 0900 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.

Sunday, 25 December 2016

23:38 UTC

Space Weather Message Code: WARK04
Serial Number: 3091
Issue Time: 2016 Dec 25 2338 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3090
Valid From: 2016 Dec 25 0255 UTC
Now Valid Until: 2016 Dec 26 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.

13:18 UTC

Space Weather Message Code: WARK04
Serial Number: 3090
Issue Time: 2016 Dec 25 1318 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3089
Valid From: 2016 Dec 25 0255 UTC
Now Valid Until: 2016 Dec 25 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.

05:09 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2505
Issue Time: 2016 Dec 25 0509 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2504
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 29524 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.

02:59 UTC

Space Weather Message Code: ALTK04
Serial Number: 1941
Issue Time: 2016 Dec 25 0259 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2016 Dec 25 0259 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.

02:56 UTC

Space Weather Message Code: WARK04
Serial Number: 3089
Issue Time: 2016 Dec 25 0256 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2016 Dec 25 0255 UTC
Valid To: 2016 Dec 25 1400 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, 24 December 2016

13:23 UTC

Space Weather Message Code: WARK04
Serial Number: 3088
Issue Time: 2016 Dec 24 1323 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3087
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 24 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.

05:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3087
Issue Time: 2016 Dec 24 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3086
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 24 1400 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: 2504
Issue Time: 2016 Dec 24 0500 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2503
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 19654 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, 23 December 2016

17:27 UTC

Space Weather Message Code: WARK04
Serial Number: 3086
Issue Time: 2016 Dec 23 1727 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3085
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 24 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.

05:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3085
Issue Time: 2016 Dec 23 0555 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3084
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 23 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.

05:04 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2503
Issue Time: 2016 Dec 23 0504 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2502
Begin Time: 2016 Dec 22 1215 UTC
Yesterday Maximum 2MeV Flux: 8093 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, 22 December 2016

14:41 UTC

Space Weather Message Code: WARK04
Serial Number: 3084
Issue Time: 2016 Dec 22 1441 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3083
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 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.

14:41 UTC

Space Weather Message Code: WARK05
Serial Number: 1294
Issue Time: 2016 Dec 22 1441 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1293
Valid From: 2016 Dec 21 1604 UTC
Now Valid Until: 2016 Dec 22 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.

12:34 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2502
Issue Time: 2016 Dec 22 1234 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2016 Dec 22 1215 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.

03:08 UTC

Space Weather Message Code: ALTK05
Serial Number: 1056
Issue Time: 2016 Dec 22 0308 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2016 Dec 22 0259 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.

02:33 UTC

Space Weather Message Code: WARK05
Serial Number: 1293
Issue Time: 2016 Dec 22 0233 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1292
Valid From: 2016 Dec 21 1604 UTC
Now Valid Until: 2016 Dec 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.

02:32 UTC

Space Weather Message Code: WARK04
Serial Number: 3083
Issue Time: 2016 Dec 22 0232 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3082
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 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.

Wednesday, 21 December 2016

21:56 UTC

Space Weather Message Code: WARK05
Serial Number: 1292
Issue Time: 2016 Dec 21 2156 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1291
Valid From: 2016 Dec 21 1604 UTC
Now Valid Until: 2016 Dec 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.

17:55 UTC

Space Weather Message Code: WARK04
Serial Number: 3082
Issue Time: 2016 Dec 21 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3081
Valid From: 2016 Dec 21 0520 UTC
Now Valid Until: 2016 Dec 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.

16:19 UTC

Space Weather Message Code: ALTK06
Serial Number: 423
Issue Time: 2016 Dec 21 1619 UTC

ALERT: Geomagnetic K-index of 6
Threshold Reached: 2016 Dec 21 1613 UTC
Synoptic Period: 1500-1800 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.

16:10 UTC

Space Weather Message Code: WARK06
Serial Number: 368
Issue Time: 2016 Dec 21 1610 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2016 Dec 21 1610 UTC
Valid To: 2016 Dec 21 2200 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.

16:06 UTC

Space Weather Message Code: ALTK05
Serial Number: 1055
Issue Time: 2016 Dec 21 1606 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2016 Dec 21 1606 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.

16:05 UTC

Space Weather Message Code: WARK05
Serial Number: 1291
Issue Time: 2016 Dec 21 1605 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2016 Dec 21 1604 UTC
Valid To: 2016 Dec 21 2200 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.

15:00 UTC

Space Weather Message Code: ALTK04
Serial Number: 1940
Issue Time: 2016 Dec 21 1500 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2016 Dec 21 1459 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.

08:32 UTC

Space Weather Message Code: WARK05
Serial Number: 1290
Issue Time: 2016 Dec 21 0832 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2016 Dec 21 0831 UTC
Valid To: 2016 Dec 21 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.

05:20 UTC

Space Weather Message Code: WARK04
Serial Number: 3081
Issue Time: 2016 Dec 21 0520 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2016 Dec 21 0520 UTC
Valid To: 2016 Dec 21 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.

Monday, 19 December 2016

19:14 UTC

Space Weather Message Code: WATA20
Serial Number: 759
Issue Time: 2016 Dec 19 1914 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Dec 20:  None (Below G1)   Dec 21:  G1 (Minor)   Dec 22:  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, 18 December 2016

20:53 UTC

Space Weather Message Code: WATA20
Serial Number: 758
Issue Time: 2016 Dec 18 2053 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Dec 19:  None (Below G1)   Dec 20:  None (Below G1)   Dec 21:  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

Latest news

Today's space weather

Auroral activity
Minor Severe
High latitude 25% 20%
Middle latitude 5% 1%
Predicted Kp max 3
Solar activity
M-class solar flare 1%
X-class solar flare 1%

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Last M-flare:2016/11/29M1.2
Last geomagnetic storm:2016/12/26Kp5 (G1)
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Last spotless day:2017/01/11

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