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FXXX02 KWNP 170426

:Product: 27-day Space Weather Forecast
:Issued: 2016 Oct 17 0400 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
#               27-day Space Weather Forecast
Forecast of Solar and Geomagnetic Activity
17 October - 12 November 2016

Solar activity is expected to be very low with a chance for C-class
flare activity throughout the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to reach moderate levels on 21-23 Oct and 7-11 Nov; high
levels on 17-20 Oct, 25-26, 30 Oct - 06 Nov, and 12 Nov; very high
levels on 27-29 Oct. Enhancement in the 2 MeV electron flux is
anticipated as a result of multiple, recurrent CH HSSs.

Geomagnetic field activity is likely to reach major storm
(G2-Moderate) levels on 17 Oct due to elevated winds from the
influence of a negative polarity coronal hole. Conditions are
expected to decrease to active by 18 Oct, and quiet to unsettled
conditions on 19 Oct, as the negative polarity CH HSS wanes. Active
conditions are again likely on 22 Oct with the onset of recurrent,
positive polarity CH HSS. Conditions are forecast to reach minor
(G1-Minor) storm levels on 23 Oct and G2 storm levels from 24-26 Oct
as solar wind speeds expected to climb. G1 storm conditions are
likely from 27-31 Oct, and active conditions by 01 Nov, as the CH
HSS slowly subsides. Quiet conditions are likely from 02-10 Nov
under an ambient solar wind regime. Unsettled conditions on 11 Nov
are likely to give way to G1 storm conditions on 12 Nov as another
negative polarity CH HSS is anticipated to enhance the near-Earth
space environment. is the U.S. government's official web portal to all federal, state and local government web resources and services.