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.

2014 April 20 at 11:21 p.m. MDT (2014 April 21 0521 UTC)


Summary For April 14-20

G1 (Minor) geomagnetic storm conditions were observed on 20 April.

R1 (Minor) radio blackout conditions were observed on 16 April.

R2 (Moderate) radio blackout conditions were observed on 18 April.

S1 (Minor) solar radiation storm conditions were observed 18-20 April.

Outlook For April 21-27

There is a chance for R1-R2 (Minor-Moderate) radio blackouts during the outlook period.

G1 (Minor) geomagnetic storm conditions are expected on 21 April.

No S1 (Minor) or greater solar radiation storms are expected during the outlook period.

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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