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

SPACE WEATHER ADVISORY OUTLOOK #11- 42
2011 September 27 at 12:52 p.m. MDT (2011 September 27 1852 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For September 19-25
A category S1(Minor) Solar Radiation Storm was observed from 23-26
September due to solar activity from active sunspot Region 1302.

Several Category R1 (Minor) - R3 (Strong) Radio Blackouts were observed
during the period. The largest events were on  22 and 24 September due
to flare activity from sunspot Region 1302.

Outlook For September 28-October 4
R1 (Minor) and R2 (Moderate) Radio Blackouts are expected throughout the
forecast period.

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