Plaese go to the Space Weather Prediction Center for more information. Please note: 
Items in grey italics apparently are older than 24 hours

390
WOXX10 KWNP 170455
WARSUD

Space Weather Message Code: WARSUD
Serial Number: 238
Issue Time: 2024 Dec 17 0450 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2024 Dec 17 0515 UTC
Valid To: 2024 Dec 17 0600 UTC
IP Shock Passage Observed: 2024 Dec 17 0445 UTC
www.swpc.noaa.gov/noaa-scales-explanation

# 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

966
WOXX13 KWNP 212356
WARK04

Space Weather Message Code: WARK04
Serial Number: 4782
Issue Time: 2024 Dec 21 2354 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 4781
Valid From: 2024 Dec 21 2059 UTC
Now Valid Until: 2024 Dec 22 0900 UTC
Warning Condition: Persistence
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

289
WOXX11 KWNP 171844
WARK05

Space Weather Message Code: WARK05
Serial Number: 1957
Issue Time: 2024 Dec 17 1754 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1956
Valid From: 2024 Dec 17 0411 UTC
Now Valid Until: 2024 Dec 17 2359 UTC
Warning Condition: Persistence
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

899
WOXX12 KWNP 170506
WARK06

Space Weather Message Code: WARK06
Serial Number: 555
Issue Time: 2024 Dec 17 0503 UTC

WARNING: Geomagnetic K-Index of 6 expected
Valid From: 2024 Dec 17 0503 UTC
Valid To: 2024 Dec 17 1200 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