Routine Space Environment Product Issued Weekly
Issued by NWS

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FXXX02 KWNP 180355

:Product: 27-day Space Weather Forecast
:Issued: 2017 Dec 18 0340 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
18 December - 13 January 2018

Solar activity is expected to be at very low levels throughout the
forecast 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 18 Dec, 22 Dec - 01 Jan, and
07-13 Jan; high levels are likely on 19-21 Dec and 02-06 Jan. All
increases in electron flux are anticipated due to the expected
influence of recurrent CH HSSs.

Geomagnetic field activity is expected to reach G1 (Minor) storm
levels on 18-19 Dec, 01 Jan, and 13 Jan. Active conditions are
likely on 20 Dec, 27 Dec, 02 Jan, and 08 Jan. Unsettled levels are
likely on 21-22 Dec, 28 Dec, 31 Dec, 03 Jan and 09 Jan. All
elevations in geomagnetic field activity are anticipated from
multiple, recurrent CH HSSs. The remainder of the forecast period is
expected to observe quiet conditions. is the U.S. government's official web portal to all federal, state and local government web resources and services.