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

SPACE WEATHER ADVISORY OUTLOOK #11- 19
2011 April 19 at 12:12 p.m. MDT (2011 April 19 1812 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For April 11-17
A geomagnetic storm reaching the G1 (Minor) level occurred on 12 April
due to the effects of a coronal hole high-speed stream. An R1 (Minor)
radio blackout was observed at 15/1712 UTC associated with a solar
flare.

Outlook For April 20-26
No space weather storms are expected.

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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