NOAA SWPC Space Weather Outlook #21-18 2021 April 18

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

SPACE WEATHER ADVISORY OUTLOOK #21-18
2021 April 18 at 7:30 p.m. MDT (2021 April 19 0130 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For April 12-18

G1 (Minor) geomagnetic storm levels were reached on 15 April due to possible effects from a 10 Apr coronal mass ejection.

Additional G1 (Minor) geomagnetic storm levels were reached on 16-17 Apr due to influence from a negative polarity, coronal hole high speed stream.

No additional significant space weather was observed during the summary period.

Outlook For April 19-25

No significant space weather is expected during the outlook 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 SWPC’s Web site http://swpc.noaa.gov