Space Weather Outlook #01- 21 — 29 May 2001

SPACE WEATHER OUTLOOK #01- 21

2001 May 29 at 9:59 a.m. MDT (2001 May 29 1559 UT)

**** SPACE WEATHER OUTLOOK ****

Summary For May 21-27

Space weather reached minor levels during the period. A category R1
(minor) radio blackout occurred on 24 May. Category R1 radio blackouts
normally degrade high frequency radio communication and low frequency
navigation signals on the sunlit side of Earth (for a complete list of
adverse system effects, please refer to the NOAA Space Weather
Scales).

Outlook For May 30-June 5

Space weather is expected to be at normal to minor levels. There will be
a minor chance for isolated category R1 radio blackouts during 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.