Routine Space Environment Product (Daily)
Issued by NWS

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FXXX12 KWNP 251313

:Product: Forecast Discussion
:Issued: 2018 Apr 25 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
#             Forecast Discussion
Solar Activity

.24 hr Summary...
Solar activity was very low. Region 2706 (N02W05, Cao/beta) remained
stable and exhibited little change. No Earth-directed CMEs were observed
in available coronagraph imagery.

Solar activity is expected to be very low, with a slight chance for
C-class flare activity, over the next three days (25-27 Apr).

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached high levels this period
with a peak flux of 12,300 pfu at 24/1950 UTC. The greater than 10 MeV
proton flux was steady at background levels throughout the period.

The greater than 2 MeV electron flux is expected to reach high levels
each of the next three days (25-27 Apr) with a chance of decreasing to
normal to moderate levels on day three (27 Apr). The greater than 10 MeV
proton flux is expected to persist at background levels throughout the
forecast period.

Solar Wind

.24 hr Summary...
Solar wind speed was generally steady around 350-375 km/s throughout the
reporting period. Total field ranged from 1 to 6 nT and Bz was variable.
Phi angle rotated between positive and negative sectors.

Solar wind parameters are expected to remain at background levels on day
one and most of day two (25-26 Apr). Parameters are expected to become
elevated late on day two into day three (27 Apr) with the onset of a
recurrent, positive polarity CH HSS.


.24 hr Summary...
The geomagnetic field was quiet.

The geomagnetic field is expected to be generally quiet over the next
two days (25-26 Apr) with the potential for unsettled levels late on day
two with the onset of a recurrent, positive polarity CH HSS. Unsettled
to active levels are anticipated on day three (27 Apr) due to continued
CH HSS influences. is the U.S. government's official web portal to all federal, state and local government web resources and services.