Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX02 KWNP 110330

:Product: 27-day Space Weather Forecast
:Issued: 2017 Dec 11 0147 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
11 December - 06 January 2018

Solar activity is expected to be at very low levels throughout the

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is
expected to reach high levels on 11 Dec, 13-17 Dec, 19-21 Dec and
02-06 Jan following recurrent CH HSS events. Normal to moderate
levels are expected at all other times during the period.

Geomagnetic field activity is expected to be at quiet to active
levels on 11-13 Dec, decreasing to quiet to unsettled levels on 14
Dec due to positive polarity CH HSS effects. Quiet conditions are
expected on 15-16 Dec. Unsettled to active conditions are expected
on 17-21 Dec, with G1 (Minor) storm levels on 18 Dec due to
recurrent positive polarity CH HSS influence. Quiet conditions are
anticipated from 22-26 Dec, followed by unsettled to active levels
on 27-28 Dec due to negative polarity CH HSS effects. A return to
quiet conditions is expected on 29-30 Dec. Predominately unsettled
to active conditions are expected on 31 Dec-03 Jan, with G1 (Minor)
levels likely on 01 Jan, due to effects from a recurrent positive
polarity CH HSS. Quiet conditions are expected for the remainder of
the period. is the U.S. government's official web portal to all federal, state and local government web resources and services.