NOAA / Space Weather Prediction Center

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Space Weather Advisories

Advisory Outlooks

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

Space Weather Advisory Outlooks, issued every Monday, provide general descriptions of conditions during the past week and an outlook for the next 7 days.

SPACE WEATHER ADVISORY OUTLOOK #13-20
2013 May 20 at 2:28 a.m. MDT (2013 May 20 0828 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For May 13-19

Multiple category R3 (Strong) and R1 (Minor) radio blackouts were observed from 13 - 17 May due to flare activity from active sunspot Region 1748.

A category S1 (Minor) solar radiation storm was observed from 15 - 18 May due to solar activity associated with Region 1748.

Several category G1 (Minor) geomagnetic storm periods occurred on 18 May as a CME, from 15 May, became geoeffective.

Outlook For May 20-26

R1 (Minor) and R2 (Moderate), with R3 (Strong) radio blackouts are possible through the outlook period as Region 1748 persists and a new yet to be numbered active region rotates onto the visible disk.

Category S1 (Minor) solar radiation storms are possible through the outlook period as solar activity is expected to remain elevated.

For current space weather conditions see: Space Weather Now, Today's Space Weather and Space Weather Alerts

SWPC Outlooks issued in the past 4 weeks

The Space Weather categories used in the Advisory products are explained at NOAA space weather scales.

Space Weather Advisories are available here as soon as they are issued. Advisories are also distributed via email through the SWPC Product Subscription Service.

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.

Each type of advisory message has its own reference number; the last two digits of the current year and a sequential message number.

Dates and times are Mountain Daylight Time (MDT) or Mountain Standard Time (MST) followed by Coordinated Universal Time (UTC). The difference between Mountain and Universal times are MDT + 6 hours = UTC or MST + 7 hours = UTC.

More information is available at SWPC's Web site or (303) 497-5127.

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