Routine Space Environment Product (Daily)
Issued by NWS

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FXXX12 KWNP 251231

:Product: Forecast Discussion
:Issued: 2017 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, with no significant flare activity. Region
2651 (N11W15, Hax/alpha) simplified magnetically. The other two numbered
sunspot groups were stable and unremarkable. No Earth-directed CMEs were
observed in available coronagraph imagery.

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

Energetic Particles

.24 hr Summary...
The greater than 2 MeV electron flux was at moderate to high levels with
a peak flux of 54,300 pfu observed at 24/1610 UTC. The greater than 10
MeV proton flux was at background values.

The greater than 2 MeV electron flux is expected to reach high to very
high levels over the next three days (25-27 Apr) due to CH HSS effects.
No solar radiation storms are expected during the forecast period.

Solar Wind

.24 hr Summary...
The solar wind environment was enhanced due to the ongoing influence a
negative polarity CH HSS. Solar wind speeds showed a slight downward
trend throughout the period averaging around 650 km/s. Total field
strength ranged between 3 and 6 nT, while the Bz component reached
a maximum southward deflection of -5 nT. Phi angle was oriented in a
negative sector.

The solar wind environment is expected to remain enhanced over the next
three days (25-27 Apr) due to the influence of the negative polarity CH


.24 hr Summary...
The geomagnetic field was at unsettled to active levels due to the
effects of a negative polarity CH HSS.

Predominantly unsettled to active conditions are expected, with
isolated G1 (Minor) storm levels possible for the next three days
(25-27 Apr) as a result of ongoing influences from the CH HSS. is the U.S. government's official web portal to all federal, state and local government web resources and services.