NOAA SWPC Space Weather Outlook #17-39 2017 September 25

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

SPACE WEATHER ADVISORY OUTLOOK #17-39
2017 September 24 at 9:51 p.m. MDT (2017 September 25 0351 UTC)

**** SPACE WEATHER OUTLOOK ****

Summary For September 18-24

G1 (Minor) geomagnetic storm conditions were observed on 18 Sep due to coronal hole high speed stream influence.

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

Outlook For September 25-October 1

G1 (Minor) geomagnetic storms are likely on 27 and 29 Sep while G2 (Moderate) geomagnetic storms are likely on 28 Sep, all due to effects from the anticipated arrival of a recurrent coronal hole high speed stream.

No other siginificant space weather is expected for 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