Space Weather Alerts, Watches and Warnings
Issue Time: 2021 Jan 12 0151 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Jan 12 0151 UTC
Synoptic Period: 0000-0300 UTC

Active Warning: Yes
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.

Issue Time: 2021 Jan 12 0105 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Jan 12 0105 UTC
Valid To: 2021 Jan 12 0900 UTC
Warning Condition: Onset
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.

Issue Time: 2021 Jan 11 1754 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3802
Valid From: 2021 Jan 11 1330 UTC
Now Valid Until: 2021 Jan 11 2359 UTC
Warning Condition: Persistence
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.

Issue Time: 2021 Jan 11 1506 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Jan 11 1459 UTC
Synoptic Period: 1500-1800 UTC

Active Warning: Yes
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.

Issue Time: 2021 Jan 11 1329 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Jan 11 1330 UTC
Valid To: 2021 Jan 11 1800 UTC
Warning Condition: Onset
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.

Issue Time: 2021 Jan 06 0802 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Jan 06 0801 UTC
Synoptic Period: 0600-0900 UTC

Active Warning: Yes
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.

Issue Time: 2021 Jan 06 0529 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Jan 06 0530 UTC
Valid To: 2021 Jan 06 1200 UTC
Warning Condition: Onset
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.

Issue Time: 2021 Jan 05 1414 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Jan 05 1414 UTC
Valid To: 2021 Jan 05 1800 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
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.

Issue Time: 2021 Jan 05 1356 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Jan 05 1348 UTC
Synoptic Period: 1200-1500 UTC

Active Warning: Yes
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.

Issue Time: 2021 Jan 05 1338 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Jan 05 1339 UTC
Valid To: 2021 Jan 06 0300 UTC
Warning Condition: Onset
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.

Issue Time: 2021 Jan 03 2044 UTC
WATCH: Geomagnetic Storm Category G1 Predicted

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

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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.

Issue Time: 2020 Dec 27 1331 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3092
Begin Time: 2020 Dec 24 1605 UTC
Yesterday Maximum 2MeV Flux: 1007 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Issue Time: 2020 Dec 26 1657 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3091
Begin Time: 2020 Dec 24 1605 UTC
Yesterday Maximum 2MeV Flux: 1525 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.
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