Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 221230
DAYDIS

:Product: Forecast Discussion
:Issued: 2017 Jul 22 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. There were no numbered sunspots on the
visible disk. No Earth-directed CMEs were observed in available
satellite imagery.

.Forecast...
Solar activity is expected to be very low on days one through three
(22-24 Jul).

Energetic Particles

.24 hr Summary...
The greater than 2 MeV electron flux was at normal to high levels with a
peak of 1,920 pfu observed at 22/1200 UTC. The greater than 10 MeV
proton flux remained at background levels during the reporting period.

.Forecast...
The greater than 2 MeV electron flux is expected to reach moderate to
high levels over the next three days (22-24 Jul). The greater than 10
MeV proton flux is expected to remain at background levels throughout
the forecast period.

Solar Wind

.24 hr Summary...
Solar wind parameters reflected the influence of a positive polarity CH
HSS. Solar wind speeds began the period near 700 km/s, achieved a period
maximum of 770 km/s, then decreased to period ending values of
approximately 525 km/s. Total field measurements ranged between 4 and 8
nT while the Bz component dropped as low as -7 nT. The phi angle was in
a positive orientation.

.Forecast...
Solar wind parameters are expected to decrease over days one and two
(22-23 Jul), returning to nominal conditions by day three (24 Jul).

Geospace

.24 hr Summary...
The geomagnetic field was at quiet to isolated minor storm levels
(G1-Minor) due to continued positive polarity CH HSS effects.

.Forecast...
The geomagnetic field is expected to be at quiet to active levels for
the remainder of day one (22 Jul) into day two (23 Jul) as CH HSS
effects persist. By day three (24 Jul), mostly quiet to unsettled
conditions are expected as CH effects gradually taper.


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