Space Weather Outlook #00-40 2000 September 11 at 09:02 p.m. MDT (2000 September 12 0302 UT)

**** SPACE WEATHER OUTLOOK ****

Summary For September 4-10

Space weather reached minor levels during the period. Isolated category
R1 (minor) radio blackouts occurred on September 4 and 9 due to
moderate-sized solar flares. R1 radio blackouts normally cause the
following effects on the sunlit portion of the Earth: minor degradation
of high-frequency radio communications with occasional loss of radio
contact and brief degradation of low frequency navigation signals.
Brief category G1 (minor) geomagnetic storms were observed on September
4 and 8. Category G1 geomagnetic storms may cause weak power grid
fluctuations and minor impacts on satellite operations.

Outlook For September 13-19

Space weather is expected to be mostly calm with a slight chance for an
isolated category R1 radio blackout. No space radiation storms are
expected. No geomagnetic storms are expected, barring an Earth-directed
CME

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 SEC’s Web site http://sec.noaa.gov or
(303) 497-5127. The NOAA Public Affairs contact is Barbara McGehan
at bmcgehan@boulder.noaa.gov or (303) 497-6288.