Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 150030
DAYDIS

:Product: Forecast Discussion
:Issued: 2017 Dec 15 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 solar disk was spotless. There were no
Earth-directed CMEs observed in available satellite imagery.

.Forecast...
Solar activity is expected to continue at very low levels over the next
three days (15-17 Dec).

Energetic Particles

.24 hr Summary...
The greater than 2 MeV electron flux was at normal to moderate levels.
The greater than 10 MeV proton flux was at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to be at normal to
moderate levels for the next three days (15-17 Dec). The greater than 10
MeV proton flux is expected to continue at background levels throughout
the forecast period.

Solar Wind

.24 hr Summary...
Solar wind parameters indicated near background conditions. Solar wind
speeds decreased from 450 km/s to near 400 km/s to end the period. Total
field did not exceed 6 nT and the Bz component was predominantly
northward with a brief negative deviation of -4 nT early in the period.
Phi angle was oriented in a mostly positive solar sector.

.Forecast...
The solar wind environment is expected to continue at background levels
until late on day three (17 Dec) when elevated wind speeds and enhanced
total field measurements will announce the arrival of a recurrent,
positive polarity CH HSS. Wind speeds are anticipated to exceed 600 km/s
with this feature.

Geospace

.24 hr Summary...
The geomagnetic field was quiet with an isolated period of unsettled
conditions during the first synoptic period of the day.

.Forecast...
The geomagnetic field is expected to be at mostly quiet levels on days
one, two, and three (15-17 Dec). Late on day three, unsettled to active
conditions are expected due to the anticipated arrival of a recurrent,
positive polarity CH HSS.



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