Space Weather Alerts, Watches and Warnings
| Issue Time: 2021 Mar 06 0308 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3850
Valid From: 2021 Mar 06 0230 UTC
Now Valid Until: 2021 Mar 06 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 Mar 06 0308 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Mar 06 0310 UTC
Valid To: 2021 Mar 06 1500 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 Mar 06 0258 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Mar 06 0257 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 Mar 06 0228 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Mar 06 0230 UTC
Valid To: 2021 Mar 06 1500 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 Mar 05 0718 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3109
Begin Time: 2021 Mar 03 0745 UTC
Yesterday Maximum 2MeV Flux: 6727 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Mar 04 0554 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3848
Valid From: 2021 Mar 02 0830 UTC
Now Valid Until: 2021 Mar 04 1200 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 Mar 04 0501 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3108
Begin Time: 2021 Mar 03 0745 UTC
Yesterday Maximum 2MeV Flux: 4798 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Mar 03 2354 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3847
Valid From: 2021 Mar 02 0830 UTC
Now Valid Until: 2021 Mar 04 0600 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 Mar 03 2107 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Mar 04: None (Below G1) Mar 05: None (Below G1) Mar 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: 2021 Mar 03 1756 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3846
Valid From: 2021 Mar 02 0830 UTC
Now Valid Until: 2021 Mar 03 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 Mar 03 0900 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Mar 03 0859 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
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 Mar 03 0805 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Mar 03 0745 UTC
Station: GOES-16
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Mar 03 0503 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3845
Valid From: 2021 Mar 02 0830 UTC
Now Valid Until: 2021 Mar 03 1800 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 Mar 03 0503 UTC | EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1581
Valid From: 2021 Mar 02 2035 UTC
Now Valid Until: 2021 Mar 03 1200 UTC
Warning Condition: Persistence
| 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 Mar 03 0503 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Mar 03 0500 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
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 Mar 03 0303 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Mar 03 0300 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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 Mar 02 2046 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Mar 02 2046 UTC
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
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 Mar 02 2039 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3844
Valid From: 2021 Mar 02 0830 UTC
Now Valid Until: 2021 Mar 03 1200 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 Mar 02 2035 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Mar 02 2035 UTC
Valid To: 2021 Mar 03 0600 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 Mar 02 1801 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Mar 02 1759 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 Mar 02 1453 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3843
Valid From: 2021 Mar 02 0830 UTC
Now Valid Until: 2021 Mar 02 2100 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 Mar 02 0827 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Mar 02 0830 UTC
Valid To: 2021 Mar 02 1500 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 Mar 01 1030 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3841
Valid From: 2021 Mar 01 0300 UTC
Now Valid Until: 2021 Mar 02 0600 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 Mar 01 0851 UTC | EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1579
Valid From: 2021 Mar 01 0350 UTC
Now Valid Until: 2021 Mar 01 2100 UTC
Warning Condition: Onset
| 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 Mar 01 0723 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Mar 01 0721 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
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 Mar 01 0421 UTC | ALERT: Geomagnetic K-index of 6
Threshold Reached: 2021 Mar 01 0420 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G2 - Moderate
| 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. | | |
| Issue Time: 2021 Mar 01 0411 UTC | WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2021 Mar 01 0410 UTC
Valid To: 2021 Mar 01 0900 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
| 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. | | |
| Issue Time: 2021 Mar 01 0401 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Mar 01 0359 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
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 Mar 01 0349 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Mar 01 0350 UTC
Valid To: 2021 Mar 01 0900 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 Mar 01 0346 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Mar 01 0345 UTC
Synoptic Period: 0300-0600 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 Mar 01 0256 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Mar 01 0300 UTC
Valid To: 2021 Mar 01 1500 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 Feb 28 0701 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3106
Begin Time: 2021 Feb 26 1230 UTC
Yesterday Maximum 2MeV Flux: 1629 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 27 2047 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 28: None (Below G1) Mar 01: None (Below G1) Mar 02: 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: 2021 Feb 27 1336 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3105
Begin Time: 2021 Feb 26 1230 UTC
Yesterday Maximum 2MeV Flux: 6370 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 26 1247 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Feb 26 1230 UTC
Station: GOES-16
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 25 0535 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3839
Valid From: 2021 Feb 24 0600 UTC
Now Valid Until: 2021 Feb 25 1200 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 Feb 24 2343 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3838
Valid From: 2021 Feb 24 0600 UTC
Now Valid Until: 2021 Feb 25 0600 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 Feb 24 2015 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Feb 24 2015 UTC
Valid To: 2021 Feb 24 2359 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 Feb 24 1757 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3837
Valid From: 2021 Feb 24 0600 UTC
Now Valid Until: 2021 Feb 24 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 Feb 24 0830 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Feb 24 0830 UTC
Valid To: 2021 Feb 24 1500 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 Feb 24 0830 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3836
Valid From: 2021 Feb 24 0600 UTC
Now Valid Until: 2021 Feb 24 1800 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 Feb 24 0816 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Feb 24 0815 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 Feb 24 0602 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 24 0600 UTC
Valid To: 2021 Feb 24 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 Feb 24 0517 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3103
Begin Time: 2021 Feb 21 0535 UTC
Yesterday Maximum 2MeV Flux: 14236 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 23 0529 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3834
Valid From: 2021 Feb 22 2042 UTC
Now Valid Until: 2021 Feb 23 1500 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 Feb 23 0459 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3102
Begin Time: 2021 Feb 21 0535 UTC
Yesterday Maximum 2MeV Flux: 9239 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 23 0231 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Feb 23 0229 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 Feb 22 2042 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 22 2042 UTC
Valid To: 2021 Feb 23 0600 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 Feb 22 1141 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 23: G1 (Minor) Feb 24: G1 (Minor) Feb 25: None (Below G1)
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: 2021 Feb 22 0833 UTC | CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 3101
Begin Time: 2021 Feb 21 0535 UTC
Yesterday Maximum 2MeV Flux: 6702 pfu
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 21 2343 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3832
Valid From: 2021 Feb 19 2034 UTC
Now Valid Until: 2021 Feb 22 1200 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 Feb 21 1040 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3831
Valid From: 2021 Feb 19 2034 UTC
Now Valid Until: 2021 Feb 21 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 Feb 21 0557 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Feb 21 0535 UTC
Station: GOES16
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
| Issue Time: 2021 Feb 20 2322 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3830
Valid From: 2021 Feb 19 2034 UTC
Now Valid Until: 2021 Feb 21 1200 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 Feb 20 1759 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3829
Valid From: 2021 Feb 19 2034 UTC
Now Valid Until: 2021 Feb 20 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 Feb 20 0459 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3828
Valid From: 2021 Feb 19 2034 UTC
Now Valid Until: 2021 Feb 20 1800 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 Feb 19 2034 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 19 2034 UTC
Valid To: 2021 Feb 20 0600 UTC
Warning Condition: Persistence
Comment: New warning supercedes the original with valid start time of 19\/1411 UTC
| 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 Feb 19 2031 UTC |
Cancel Serial Number: 3826
Original Issue Time:
Comment: Cancelling current warning due to program error. Will issue one to replace it with an ending time of Feb 20 0600 UTC
| 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 Feb 19 2017 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Feb 19 2015 UTC
Valid To: 2021 Feb 20 0300 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 Feb 19 1820 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 20: G1 (Minor) Feb 21: None (Below G1) Feb 22: None (Below G1)
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: 2021 Feb 19 1755 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3825
Valid From: 2021 Feb 19 1411 UTC
Now Valid Until: 2021 Feb 19 2359 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 Feb 19 1443 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Feb 19 1434 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 Feb 19 1411 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 19 1411 UTC
Valid To: 2021 Feb 19 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 Feb 18 1706 UTC | WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Feb 19: None (Below G1) Feb 20: None (Below G1) Feb 21: 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: 2021 Feb 16 1144 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3823
Valid From: 2021 Feb 16 0528 UTC
Now Valid Until: 2021 Feb 16 1500 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 Feb 16 0538 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Feb 16 0536 UTC
Synoptic Period: 0300-0600 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 Feb 16 0529 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 16 0528 UTC
Valid To: 2021 Feb 16 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 Feb 13 1047 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Feb 13 1045 UTC
Synoptic Period: 0900-1200 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 Feb 13 0421 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 13 0420 UTC
Valid To: 2021 Feb 13 1500 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 Feb 08 2333 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 08 2331 UTC
Valid To: 2021 Feb 09 0600 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 Feb 07 1453 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3819
Valid From: 2021 Feb 06 2000 UTC
Now Valid Until: 2021 Feb 07 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 Feb 07 0747 UTC | EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 3818
Valid From: 2021 Feb 06 2000 UTC
Now Valid Until: 2021 Feb 07 1500 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 Feb 07 0553 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Feb 07 0543 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
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 Feb 07 0325 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Feb 07 0230 UTC
Valid To: 2021 Feb 07 0900 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 Feb 07 0324 UTC | CANCEL WARNING: Geomagnetic K-index of 5 expected
Cancel Serial Number: 1573
Original Issue Time: 2021 Feb 07 0228 UTC | Comment: Will resend with correct dates
| 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 Feb 07 0228 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Feb 07 0230 UTC
Valid To: 2021 Feb 07 0900 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 Feb 07 0243 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Feb 07 0238 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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 Feb 07 0243 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Feb 07 0238 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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 Feb 07 0243 UTC | ALERT: Geomagnetic K-index of 5
Threshold Reached: 2021 Feb 06 0238 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
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 Feb 07 0228 UTC | WARNING: Geomagnetic K-index of 5 expected
Valid From: 2021 Feb 06 0230 UTC
Valid To: 2021 Feb 06 0900 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 Feb 06 2101 UTC | ALERT: Geomagnetic K-index of 4
Threshold Reached: 2021 Feb 06 2059 UTC
Synoptic Period: 1800-2100 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 Feb 06 2001 UTC | WARNING: Geomagnetic K-index of 4 expected
Valid From: 2021 Feb 06 2000 UTC
Valid To: 2021 Feb 07 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 Feb 06 1512 UTC | ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2021 Feb 06 1455 UTC
Station: GOES-16
| | Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems. | | |
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