Official Space Weather Advisory issued by NOAA Space Weather Prediction Center

Boulder, Colorado, USA



SPACE WEATHER ADVISORY OUTLOOK #25-31

2025 August 31 at 8:00 p.m. MDT (2025 September 1 0200 UTC)



**** SPACE WEATHER OUTLOOK ****



Summary For August 25-31


R1 (Minor) events were observed on 25, 26, and 28-30 Aug.



S1 (Minor) levels were reached at 25/1355 UTC, observed a peak of 13 pfu at 27/0740 UTC, and decreased below threshold at 27/1510 UTC.



No G1 or greater geomagnetic storms were observed.



Outlook For September 1-7



R1-R2 (Minor-Moderate events) are likely through 07 Sep.



There is a chance for (S1-Minor) storming on 01-02 Sep as the halo CME from 30 Aug passes Earth.



G2 (Moderate) geomagnetic storm levels are likely on 01 Sep and G3 (Strong) levels are likely on 02 Sep as the halo CME from 30 Aug passes Earth,



Data used to provide space weather services are contributed by NOAA,

USAF, NASA, NSF, USGS, the International Space Environment Services 

and other observatories, universities, and institutions. More 

information is available at SWPC's Web site http://swpc.noaa.gov

---

Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do not use the from address for correspondence, as it is not monitored. For comments or help, please contact SWPC Help.