National Weather Service

Generic Space Environment Advisory
NWS Homepage
This page is being discontinued on March 12, 2014.
The same data is available at this site. Please update your bookmarks.
Thank you, and we apologize for the inconvenience.
Please send an email to with any concerns.

Current Version
Previous Version:    
NWXX04 KWNP 250746

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

2014 August 25 at 1:41 a.m. MDT (2014 August 25 0741 UTC)


Summary For August 18-24

Category R1 (Minor) radio blackouts were observed on 21-22 August due to flare activity from active sunspot Region 2149.

A category R2 (Moderate) radio blackout was observed on 24 August due to flare activity from active sunspot Region 2151.

A category G2 (Moderate) geomagnetic storm occurred on 19 August due to a coronal mass ejection associated with a filament eruption that originated on 15 August.

Outlook For August 25-31

Category R1-R2 (Minor-Moderate) radio blackouts are likely for the forecast period (Aug 25-31) due to potential flare activity from active sunspot Regions 2146, 2149, and 2151.

A chance exists for a G1 (minor) geomagnetic storm on 26 August due to the arrival of a pair of coronal mass ejections that occurred on 22 August.

Current space weather conditions at, and

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
Advisories Web site or (303) 497-5127.

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
Page last modified: May 16, 2007
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE