NOAA SEC Space Weather Outlook #01-49 — 4 Dec 2001

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

SPACE WEATHER OUTLOOK #01- 49

2001 December 04 at 02:52 p.m. MST (2001 December 04 2152 UT)

**** SPACE WEATHER OUTLOOK ****

Summary For November 26-December 2
Space weather reached moderate levels during the period. A solar
radiation storm was in progress and on the wane as the period began.
The storm ended on November 27. Intermittent category R1 (minor) radio
blackouts occurred during most of the period due to moderate-sized
solar flares. There were six category R1 radio blackouts observed on
December 01. Category R2 (moderate) radio blackouts occurred on
November 28 at 09:35 a.m. MST (2001 November 28 1635 UT) and November
29 at 3:36 a.m. MST (2001 November 29 1036 UT) due to major solar
flares from a large, magnetically complex sunspot group (NOAA Region
9715). For a list of adverse system effects associated with space
weather storms, please refer to the NOAA Space Weather Scales.

Outlook For December 5-11

Space weather is expected to be at minor to moderate levels with
isolated category R1 radio blackouts likely. There will also be a fair
chance for an isolated category R2 (moderate) radio blackout through
December 10. There will be a slight chance for a category S1 (minor)
solar radiation storm 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.