Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 261231
DAYDIS

:Product: Forecast Discussion
:Issued: 2018 Apr 26 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
#             Forecast Discussion
#
Solar Activity

.24 hr Summary...
Solar activity was very low. Region 2706 (N03W16, Axx/alpha) showed
signs of continued decay. No Earth-directed CMEs were observed in
available coronagraph imagery.

.Forecast...
Solar activity is expected to be very low, with a slight chance for
C-class flare activity, over the next three days (26-28 Apr).

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached high levels this period
with a peak flux of 5,060 pfu at 25/1950 UTC. The greater than 10 MeV
proton flux was steady at background levels throughout the period.

.Forecast...
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 days two and three (26-27 Apr). The greater
than 10 MeV proton flux is expected to persist at background levels
throughout the forecast period.

Solar Wind

.24 hr Summary...
The solar wind environment was at background levels. Solar wind speed
was generally less than 350 km/s throughout the reporting period. Total
field ranged from 1 to 5 nT and Bz was variable. Phi angle was
predominantly negative.

.Forecast...
Solar wind parameters are expected to remain at background levels for
most of day one (26 Apr) then become elevated on days two and three
(27-28 Apr) with the onset of a recurrent, positive polarity CH HSS.

Geospace

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

.Forecast...
The geomagnetic field is expected to be generally quiet for most of day
one (26 Apr). Unsettled to active levels are anticipated on days two
three (27-28 Apr) due to a recurrent, positive polarity CH HSS.



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