Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 260030
DAYDIS

:Product: Forecast Discussion
:Issued: 2018 Feb 26 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. The visible disk remained spotless. No
Earth-directed CMEs were observed in available satellite imagery.

.Forecast...
Solar activity is expected to be very low throughout the forecast period
(26-28 Feb).

Energetic Particles

.24 hr Summary...
The greater than 2 MeV electron flux was at moderate to high levels with
a peak flux of 1,570 pfu observed at 25/0005 UTC. The greater than 10
MeV proton flux was at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to be at moderate to
high levels and the greater than 10 MeV proton flux is expected to
continue at background levels throughout the forecast period (26-28
Feb).

Solar Wind

.24 hr Summary...
Solar wind parameters reflected a return to ambient conditions. Wind
speeds declined from near 440 km/s to period ending values around
400 km/s. Total field reached a maximum value of 7 nT while the Bz
component dropped to a period low of -2 nT. Phi angle was variable,
oscillating between negative and positive sectors.

.Forecast...
An enhancement in the solar wind environment is likely on days one and
two (26-27 Feb) due to the anticipated arrival of a polar-connected,
negative polarity CH HSS. Day three (28 Feb), should see a return to
nominal solar wind parameters.

Geospace

.24 hr Summary...
The geomagnetic field was quiet under a nominal solar wind regime.

.Forecast...
The geomagnetic field is expected to be at unsettled to G1 (Minor) storm
levels on day one (26 Feb), and quiet to unsettled levels on day two (27
Feb), due to the anticipated arrival of a polar-connected, negative
polarity CH HSS. Day three (28 Feb) should see a return to mostly quiet
conditions as the effects of this feature are expected to be short in
duration.


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