National Weather Service Text Product Display

Routine Space Environment Product (Daily)
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000
FXXX12 KWNP 240031
DAYDIS

:Product: Forecast Discussion
:Issued: 2017 Jun 24 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. Regions 2662 (N13W65, Hrx/alpha) and 2664
(N18E35, Hsx/alpha) were both stable. No Earth-directed CMEs were
observed in available coronagraph imagery.

.Forecast...
Solar activity is expected to be very low with a slight chance for
C-class flares over the next three days (24-26 Jun).

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 remained at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to persist at normal to
moderate levels for day one (24 Jun). High levels are likely on day two
and three (25-26 Jun) in response to elevated wind speeds from an
anticipated positive polarity CH HSS. The greater than 10 MeV proton
flux is expected to persist at background levels throughout the forecast
period.

Solar Wind

.24 hr Summary...
Solar wind parameters, as measured by the DSCOVR spacecraft, suggested
close proximity to the current sheet. Total magnetic field strength
increased from near 1 nT at the start of the period to 5-6 nT through
the majority of the UT day. The Bz component was variable with a maximum
southward deflection of -5 nT. Solar wind speeds were relatively low
with speeds mostly between 320-350 km/s. Phi angle transitioned to the
negative sector between 23/0100-0630 UTC and remained positive for the
rest of the period.

.Forecast...
Solar wind parameters are expected reflect minor enhancements from the
influence of positive polarity CH HSS. CH HSS effects are expected to
slowly wane over the next there days (24-26 Jun).

Geospace

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

.Forecast...
The geomagnetic field is expected to be mostly quiet to unsettled, with
isolated periods of active levels likely, on day one due to the
anticipated influence of a positive polarity CH HSS. Days two and three
(25-26 Jun) are expected to see field activity produce quiet to
unsettled conditions as influence of the CH HSS slowly subsides.
National Weather Service Weather Forecast Office
