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

SPACE WEATHER ADVISORY OUTLOOK #11- 41
2011 September 20 at 02:52 p.m. MDT (2011 September 20 2052 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For September 12-18
A category G1 (Minor) geomagnetic storm occurred on 17 September due to
the arrival of a coronal mass ejection from 13 September.

Outlook For September 21-27
Isolated category R1 (minor) radio blackouts are possible from 24 - 27
September due to flare activity.

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

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