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.

Sunday, 16 December 2018

14:16 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2885
Issue Time: 2018 Dec 16 1416 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2884
Begin Time: 2018 Dec 10 2010 UTC
Yesterday Maximum 2MeV Flux: 1273 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, 15 December 2018

13:52 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2884
Issue Time: 2018 Dec 15 1352 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2883
Begin Time: 2018 Dec 10 2010 UTC
Yesterday Maximum 2MeV Flux: 2388 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, 14 December 2018

13:05 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2883
Issue Time: 2018 Dec 14 1305 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2882
Begin Time: 2018 Dec 10 2010 UTC
Yesterday Maximum 2MeV Flux: 2117 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, 13 December 2018

12:08 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2882
Issue Time: 2018 Dec 13 1208 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2881
Begin Time: 2018 Dec 10 2010 UTC
Yesterday Maximum 2MeV Flux: 2453 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, 12 December 2018

09:31 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2881
Issue Time: 2018 Dec 12 0931 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2880
Begin Time: 2018 Dec 10 2010 UTC
Yesterday Maximum 2MeV Flux: 2715 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, 11 December 2018

13:00 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2880
Issue Time: 2018 Dec 11 1300 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2879
Begin Time: 2018 Dec 10 2010 UTC
Yesterday Maximum 2MeV Flux: 1081 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, 10 December 2018

20:26 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2879
Issue Time: 2018 Dec 10 2026 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2018 Dec 10 2010 UTC
Station: GOES-15


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, 9 December 2018

23:04 UTC

Space Weather Message Code: ALTK04
Serial Number: 2091
Issue Time: 2018 Dec 09 2304 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Dec 09 2304 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.

22:43 UTC

Space Weather Message Code: WARK04
Serial Number: 3571
Issue Time: 2018 Dec 09 2243 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 09 2244 UTC
Valid To: 2018 Dec 10 0900 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.

Friday, 7 December 2018

19:45 UTC

Space Weather Message Code: WARK04
Serial Number: 3570
Issue Time: 2018 Dec 07 1945 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 07 1945 UTC
Valid To: 2018 Dec 08 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.

Monday, 3 December 2018

18:35 UTC

Space Weather Message Code: WATA20
Serial Number: 847
Issue Time: 2018 Dec 03 1835 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Dec 04: None (Below G1) Dec 05: G1 (Minor) Dec 06: 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.

15:07 UTC

Space Weather Message Code: WARK04
Serial Number: 3569
Issue Time: 2018 Dec 03 1507 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 03 1510 UTC
Valid To: 2018 Dec 03 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.

Sunday, 2 December 2018

23:59 UTC

Space Weather Message Code: ALTK04
Serial Number: 2090
Issue Time: 2018 Dec 02 2359 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2018 Dec 02 2359 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.

23:51 UTC

Space Weather Message Code: WARK04
Serial Number: 3568
Issue Time: 2018 Dec 02 2351 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 02 2350 UTC
Valid To: 2018 Dec 02 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.

Saturday, 1 December 2018

17:25 UTC

Space Weather Message Code: WARK04
Serial Number: 3567
Issue Time: 2018 Dec 01 1725 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Dec 01 1725 UTC
Valid To: 2018 Dec 02 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.

Thursday, 29 November 2018

14:38 UTC

Space Weather Message Code: WATA20
Serial Number: 846
Issue Time: 2018 Nov 29 1438 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

Highest Storm Level Predicted by Day:
Nov 30: None (Below G1) Dec 01: G1 (Minor) Dec 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.

Wednesday, 28 November 2018

18:18 UTC

Space Weather Message Code: WATA20
Serial Number: 845
Issue Time: 2018 Nov 28 1818 UTC

WATCH: Geomagnetic Storm Category G1 Predicted

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

Tuesday, 20 November 2018

05:20 UTC

Space Weather Message Code: WARK04
Serial Number: 3566
Issue Time: 2018 Nov 20 0520 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2018 Nov 20 0521 UTC
Valid To: 2018 Nov 20 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.

Friday, 16 November 2018

17:01 UTC

Space Weather Message Code: ALTEF3
Serial Number: 2878
Issue Time: 2018 Nov 16 1701 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2877
Begin Time: 2018 Nov 11 1625 UTC
Yesterday Maximum 2MeV Flux: 1448 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.

Current data suggest that it is not possible to see aurora now at middle latitudes

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