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FXXX02 KWNP 220255

:Product: 27-day Space Weather Forecast
:Issued: 2017 May 22 0235 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
22 May - 17 June 2017

Solar activity is expected to be very low with a slight 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 range from normal to very high levels. Moderate levels
are likely on 01-10 Jun and 12-15 Jun; high levels are likely on 22
May, 27-31 May, and 16-17 Jun; very high levels are likely on 23-26
May. Elevated levels of electrons are in response to multiple,
recurrent, CH HSSs. The remainder of the outlook period is likely to
observe normal background levels.

Geomagnetic field activity is expected to be at quiet to G1 (Minor)
storm levels. Active conditions are likely on 22 May with unsettled
conditions likely on 23-24 May due to the waning effects of a
negative polarity CH HSS. Quiet conditions are then likely to
prevail from 25 May-09 Jun under a nominal solar wind regime. An
increase to active conditions is likely on 10-11 Jun from a positive
polarity CH HSS. Quiet conditions are again likely on 12-13 Jun. A
SSBC is expected to cause unsettled conditions on 14 Jun. A
subsequent negative polarity CH HSS is likely to cause active
conditions on 15 Jun, G1 (Minor) conditions on 16 Jun, then active
conditions as the CH HSS wanes on 17 Jun. is the U.S. government's official web portal to all federal, state and local government web resources and services.