372
NWXX04 KWNP 210136
ADVOUT

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center
Boulder, Colorado, USA

SPACE WEATHER ADVISORY OUTLOOK #25-14
2025 April 20 at 7:31 p.m. MDT (2025 April 21 0131 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For April 14-20

-G1 (Minor) storms were observed on 15-16 Apr due to CME influences, and on 20 Apr due to prolonged periods of southward IMF.
-G2 (Moderate) storms were observed on 15-16 Apr due to CME influences.
-G3 (Strong) storms were observed on 16 Apr due to CME influences.
-G4 (Severe) storms were observed on 16 Apr due to CME influences.

-R1 (Minor) events were observed on 14-15, 18, and 20 Apr.

Outlook For April 21-27

-Periods of G1 (Minor) storming are likely on 22-25 Apr due to positive polarity CH HSS influences.
-Periods of G2 (Moderate) storming are likely on 22-23 Apr due to positive polarity CH HSS influences.

No other space weather storms are expected during the forecast period.



Space Weather Prediction Center links
Current space weather conditions http://www.swpc.noaa.gov/communities/space-weather-enthusiasts
Alerts http://www.swpc.noaa.gov/products/alerts-watches-and-warnings
Outlook http://www.swpc.noaa.gov/products/space-weather-advisory-outlook

Data used to provide space weather services are contributed by NOAA,
USAF, NASA, NSF, USGS, the International Space Environment Service (ISES)
and other observatories, universities, and institutions. For more
information, including email services, see SWPC`s Space Weather
Prediction Center Web site http://www.swpc.noaa.gov/ or (303) 497-3171.