Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 270032
DAYDIS

:Product: Forecast Discussion
:Issued: 2018 Apr 27 0030 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 (N03W27, Hrx/alpha) decayed
from a beta to an alpha grouping having lost its trailing spots. No
Earth-directed CMEs were observed in available coronagraph imagery.

.Forecast...
Solar activity is expected to be very low over the next three days
(27-29 Apr).

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached high levels this period
with a peak flux of 4,390 pfu at 26/1850 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 (27-29 Apr) with a chance of decreasing to
normal to moderate levels. 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 near-background levels. Solar wind
speed increased from around 340 km/s to 360 km/s throughout the day.
Total field ranged from 1 to 4 nT and Bz was variable. Phi angle
switched from a predominately negative orientation to a positive
orientation around midday.

.Forecast...
Solar wind parameters are expected become elevated on days one (27 Apr)
with the onset of a recurrent, positive polarity CH HSS. A return to
background levels is expected on days two and three (28-29 Apr) as CH
HSS effects diminish.

Geospace

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

.Forecast...
The geomagnetic field is expected be to at unsettled to active levels on
day one (27 Apr) due to the effects of a recurrent, positive polarity CH
HSS. Quiet levels are expected again on days two and three (28-29 Apr)
as the solar wind environment returns to background levels.



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