Space Weather Message Code: ALTK05
Serial Number: 2026
Issue Time: 2026 Jun 05 2325 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jun 05 2324 UTC
Synoptic Period: 2100-2400
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:
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: ALTK05
Serial Number: 2025
Issue Time: 2026 Jun 05 2009 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jun 05 2002 UTC
Synoptic Period: 1800-2100
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:
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: WARK04
Serial Number: 5360
Issue Time: 2026 Jun 05 1854 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5359
Valid From: 2026 Jun 05 0434 UTC
Now Valid Until: 2026 Jun 06 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 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: WATA30
Serial Number: 274
Issue Time: 2026 Jun 05 1852 UTC
WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
Jun 06: G2 (Moderate) Jun 07: None (Below G1) Jun 08: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Comment:
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: WARK06
Serial Number: 662
Issue Time: 2026 Jun 05 1721 UTC
EXTENDED WARNING: Geomagnetic K-index of 6 expected
Extension to Serial Number: 661
Valid From: 2026 Jun 05 1437 UTC
Now Valid Until: 2026 Jun 06 0300 UTC
Warning Condition: Persistence
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: 2239
Issue Time: 2026 Jun 05 1719 UTC
EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 2238
Valid From: 2026 Jun 05 1228 UTC
Now Valid Until: 2026 Jun 06 0600 UTC
Warning Condition: Persistence
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: WARK07
Serial Number: 150
Issue Time: 2026 Jun 05 1716 UTC
WARNING: Geomagnetic K-index of 7 or greater expected
Valid From: 2026 Jun 05 1714 UTC
Valid To: 2026 Jun 05 2359 UTC
Warning Conditions: Onset
Noaa Scale: G3 - Greater
Comment:
NOAA Scale: G3 - Greater
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Space Weather Message Code: ALTK06
Serial Number: 718
Issue Time: 2026 Jun 05 1639 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Jun 05 1638 UTC
Synoptic Period: 1500-1800
Active Warning: YES
Noaa Scale: G2 - Moderate
Comment:
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: ALTK05
Serial Number: 2024
Issue Time: 2026 Jun 05 1621 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jun 05 1620 UTC
Synoptic Period: 1500-1800
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:
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: WARK06
Serial Number: 661
Issue Time: 2026 Jun 05 1441 UTC
WARNING: Geomagnetic K-index of 6 expected
Valid From: 2026 Jun 05 1437 UTC
Valid To: 2026 Jun 05 2100 UTC
Warning Conditions: Onset
Noaa Scale: G2 - Moderate
Comment:
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.
--------------------------------------------------------------------------------
Space Weather Message Code: ALTK05
Serial Number: 2023
Issue Time: 2026 Jun 05 1335 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Jun 05 1327 UTC
Synoptic Period: 1200-1500
Active Warning: YES
Noaa Scale: G1 - Minor
Comment:
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: ALTK04
Serial Number: 2664
Issue Time: 2026 Jun 05 1258 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Jun 05 1253 UTC
Synoptic Period: 1200-1500
Active Warning: YES
Comment:
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: 2238
Issue Time: 2026 Jun 05 1230 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Jun 05 1228 UTC
Valid To: 2026 Jun 05 2100 UTC
Warning Conditions: Onset
Noaa Scale: G1 - Minor
Comment:
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: SUMSUD
Serial Number: 300
Issue Time: 2026 Jun 05 0513 UTC
SUMMARY: Geomagnetic Sudden Impulse
Observed: 2026 Jun 05 0511 UTC
Deviation: 70 nT
Station: MEA
Comment:
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Space Weather Message Code: WARK04
Serial Number: 5359
Issue Time: 2026 Jun 05 0435 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Jun 05 0434 UTC
Valid To: 2026 Jun 06 0300 UTC
Warning Conditions: Onset
Comment:
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: WARSUD
Serial Number: 255
Issue Time: 2026 Jun 05 0433 UTC
WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2026 Jun 05 0450 UTC
Valid To: 2026 Jun 05 1515 UTC
Ip Shock: 2026-06-05 04:31
Comment: