Space Weather Outlook #01- 33 — 21 Aug 2001

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

SPACE WEATHER OUTLOOK #01- 33

2001 August 21 at 04:40 p.m. MDT (2001 August 21 2240 UT)

**** SPACE WEATHER OUTLOOK ****

Summary For August 13-19

Space weather reached moderate levels during the period. A category S2
(moderate) solar radiation storm occurred during August 16 – 18
following a remarkable event on the far side of the Sun late on August
15. Category G1 (minor) geomagnetic storm conditions were observed on
August 13 due to a CME passage. Category G1 – G2 (minor to moderate)
geomagnetic storm conditions occurred on August 17 due to a CME
passage. For a list of adverse system effects related to space weather
storms, please refer to the NOAA Space Weather Scales.

Outlook For August 22-28

Space weather is expected to be at minor to moderate levels. Isolated
category R1 (minor) radio blackouts will be likely during the period.
There will also be a slight chance for an isolated category R2
(moderate) radio blackout. There will be a slight chance for a category
S1 (minor) radiation storm during the latter half of the 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 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.