Plaese go to the Space Weather Prediction Center for more information.
Items in grey italics apparently are older than 24 hours
327
WOXX22 KWNP 092106
WATA50
Space Weather Message Code: WATA50
Serial Number: 95
Issue Time: 2025 Dec 09 2103 UTC
CANCEL WATCH: Geomagnetic Storm Category G3 Predicted
Cancel Serial Number: 94
Original Issue Time: 2025 Dec 07 0443 UTC
Comment: Enhancement from anticipated CME did not occur
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
063
WOXX13 KWNP 100711
WARK04
Space Weather Message Code: WARK04
Serial Number: 5177
Issue Time: 2025 Dec 10 0708 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Dec 10 0707 UTC
Valid To: 2025 Dec 10 1500 UTC
Warning Condition: Onset
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.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
238
WOXX11 KWNP 060841
WARK05
Space Weather Message Code: WARK05
Serial Number: 2148
Issue Time: 2025 Dec 06 0837 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2025 Dec 06 0836 UTC
Valid To: 2025 Dec 06 2359 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
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.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
904
WOXX12 KWNP 031956
WARK06
Space Weather Message Code: WARK06
Serial Number: 627
Issue Time: 2025 Dec 03 1953 UTC
WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2025 Dec 03 1952 UTC
Valid To: 2025 Dec 03 2359 UTC
Warning Condition: Onset
NOAA Scale: G2 - Moderate
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.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
624
WOXX14 KWNP 032031
WARK07
Space Weather Message Code: WARK07
Serial Number: 139
Issue Time: 2025 Dec 03 2027 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2025 Dec 03 2025 UTC
Valid To: 2025 Dec 03 2359 UTC
Warning Condition: Onset
NOAA Scale: G3 or greater
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
548
WOXX14 KWNP 032051
ALTK07
Space Weather Message Code: ALTK07
Serial Number: 200
Issue Time: 2025 Dec 03 2048 UTC
ALERT: Geomagnetic K-index of 7
Synoptic Period: 1800-2100 UTC
Active Warning: Yes
NOAA Scale: G3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact primarily poleward of 50 degrees Geomagnetic Latitude.
Induced Currents - Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Spacecraft - Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Navigation - Intermittent satellite navigation (GPS) problems, including loss-of-lock and increased range error may occur.
Radio - HF (high frequency) radio may be intermittent.
Aurora - Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
708
WOXX02 KWNP 080515
SUMX01
Space Weather Message Code: SUMX01
Serial Number: 204
Issue Time: 2025 Dec 08 0513 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2025 Dec 08 0449 UTC
Maximum Time: 2025 Dec 08 0501 UTC
End Time: 2025 Dec 08 0504 UTC
X-ray Class: X1.1
Location: S18W55
NOAA Scale: R3 - Strong
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.
# Issued by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Recent messages, data, and help at http://swpc.noaa.gov/alerts/
# Send questions to SWPC.Webmaster@noaa.gov
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