####018000819####
WOXX01 KWNP 281951

ALTXMF



Space Weather Message Code: ALTXMF

Serial Number: 329

Issue Time: 2023 Nov 28 1946 UTC



ALERT: X-Ray Flux exceeded M5

Threshold Reached: 2023 Nov 28 1940 UTC

NOAA Scale: R2 - Moderate

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.



# 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

####018001069####
WOXX21 KWNP 281951

WATA30



Space Weather Message Code: WATA30

Serial Number: 225

Issue Time: 2023 Nov 28 1945 UTC



WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:

Nov 29:  None (Below G1)   Nov 30:  G1 (Minor)   Dec 01:  G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

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