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Space Weather Message Code: WARK04
Serial Number: 5150
Issue Time: 2025 Nov 15 2002 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2025 Nov 15 2000 UTC
Valid To: 2025 Nov 16 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.
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Space Weather Message Code: SUMPX1
Serial Number: 126
Issue Time: 2025 Nov 14 2338 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025 Nov 14 0920 UTC
Maximum Time: 2025 Nov 14 0950 UTC
End Time: 2025 Nov 14 1325 UTC
Maximum 10MeV Flux: 16 pfu
NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
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Space Weather Message Code: WATA20
Serial Number: 1076
Issue Time: 2025 Nov 14 1750 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Nov 15: None (Below G1) Nov 16: G1 (Minor) Nov 17: 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.
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Space Weather Message Code: SUM10R
Serial Number: 888
Issue Time: 2025 Nov 14 1209 UTC
SUMMARY: 10cm Radio Burst
Begin Time: 2025 Nov 14 0822 UTC
Maximum Time: 2025 Nov 14 0825 UTC
End Time: 2025 Nov 14 0841 UTC
Duration: 19 minutes
Peak Flux: 1100 sfu
Latest Penticton Noon Flux: 156 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.
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Space Weather Message Code: ALTTP4
Serial Number: 695
Issue Time: 2025 Nov 14 1145 UTC
ALERT: Type IV Radio Emission
Begin Time: 2025 Nov 14 0837 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.
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Space Weather Message Code: ALTPX1
Serial Number: 361
Issue Time: 2025 Nov 14 0937 UTC
ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025 Nov 14 0920 UTC
NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
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Space Weather Message Code: WARPX1
Serial Number: 616
Issue Time: 2025 Nov 14 0917 UTC
WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2025 Nov 14 0917 UTC
Valid To: 2025 Nov 14 2359 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
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Space Weather Message Code: SUMX01
Serial Number: 202
Issue Time: 2025 Nov 14 0908 UTC
SUMMARY: X-ray Event exceeded X1
Begin Time: 2025 Nov 14 0744 UTC
Maximum Time: 2025 Nov 14 0830 UTC
End Time: 2025 Nov 14 0840 UTC
X-ray Class: X4
Optical Class: na
Location: N24W68
NOAA Scale: R3 - Strong
NOAA Space Weather Scale descriptions can be found at
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.
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Space Weather Message Code: ALTTP2
Serial Number: 1443
Issue Time: 2025 Nov 14 0841 UTC
ALERT: Type II Radio Emission
Begin Time: 2025 Nov 14 0813 UTC
Estimated Velocity: 1525 km/s
Comment: From San Vito
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.
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Space Weather Message Code: ALTXMF
Serial Number: 500
Issue Time: 2025 Nov 14 0826 UTC
ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2025 Nov 14 0823 UTC
NOAA Scale: R2 - Moderate
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/products/d-region-absorption-predictions-d-rap.
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Space Weather Message Code: SUMPX1
Serial Number: 125
Issue Time: 2025 Nov 13 2111 UTC
SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2025 Nov 10 1030 UTC
Maximum Time: 2025 Nov 12 0215 UTC
End Time: 2025 Nov 13 2100 UTC
Maximum 10MeV Flux: 1456 pfu
NOAA Scale: S3 - Strong
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
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Space Weather Message Code: WARK04
Serial Number: 5149
Issue Time: 2025 Nov 13 2058 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5148
Valid From: 2025 Nov 11 2230 UTC
Now Valid Until: 2025 Nov 14 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.
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Space Weather Message Code: WARK05
Serial Number: 2138
Issue Time: 2025 Nov 13 2056 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2137
Valid From: 2025 Nov 11 2343 UTC
Now Valid Until: 2025 Nov 14 0900 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.
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Space Weather Message Code: WARK06
Serial Number: 626
Issue Time: 2025 Nov 13 2056 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 625
Valid From: 2025 Nov 11 2344 UTC
Now Valid Until: 2025 Nov 14 0900 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 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.
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Space Weather Message Code: WATA50
Serial Number: 93
Issue Time: 2025 Nov 13 1538 UTC
WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day:
Nov 13: G3 (Strong) Nov 14: G1 (Minor) Nov 15: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment: Downgrading watch to G3 (Strong) for the remainder of 13 Nov as geomagnetic activity gradually subsides.
NOAA Space Weather Scale descriptions can be found at
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.
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Space Weather Message Code: WARK06
Serial Number: 625
Issue Time: 2025 Nov 13 1447 UTC
EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 624
Valid From: 2025 Nov 11 2344 UTC
Now Valid Until: 2025 Nov 13 2100 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 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.
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Space Weather Message Code: ALTK05
Serial Number: 1914
Issue Time: 2025 Nov 13 1436 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2025 Nov 13 1435 UTC
Synoptic Period: 1200-1500 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.
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Space Weather Message Code: WARPX1
Serial Number: 615
Issue Time: 2025 Nov 13 1145 UTC
EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 614
Valid From: 2025 Nov 10 1030 UTC
Now Valid Until: 2025 Nov 13 2100 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
NOAA Space Weather Scale descriptions can be found at
www.swpc.noaa.gov/noaa-scales-explanation
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.
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Space Weather Message Code: ALTK06
Serial Number: 676
Issue Time: 2025 Nov 13 0732 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2025 Nov 13 0723 UTC
Synoptic Period: 0600-0900 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.
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Space Weather Message Code: WARK05
Serial Number: 2137
Issue Time: 2025 Nov 13 0732 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2136
Valid From: 2025 Nov 11 2343 UTC
Now Valid Until: 2025 Nov 13 2100 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.
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https://www.swpc.noaa.gov/products/alerts-watches-and-warnings