Routine Space Environment Product (Daily)
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622
FXXX12 KWNP 261231
DAYDIS

:Product: Forecast Discussion
:Issued: 2017 Jun 26 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. Region 2664 (N18W00, Dso/beta) displayed
penumbral development and consolidation in its leader. There were no
Earth-directed CMEs observed in available satellite imagery.

.Forecast...
Solar activity is expected to be very low with a slight chance for
C-class flares over the next three days (26-28 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 the next three days (26-28 Jun). 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, indicated
continued influence from a positive polarity CH HSS. Solar wind speeds
steadily increased through the period from around 435 km/s to a peak of
582 km/s at 26/1035 UTC. Total field strength was between 4 and 10 nT
while the Bz component dropped as low as -6 nT. Phi angle was
predominantly positive throughout the reporting period.

.Forecast...
Solar wind parameters are expected to reflect decreasing influence from
the positive polarity CH HSS on day one (26 Jun). A nominal solar wind
environment is expected on days two (27 Jun) and early on day three (28
Jun). Later on day three there will likely be an additional minor
enhancement from a small trans-equitorial, positive polarity CH HSS.

Geospace

.24 hr Summary...
The geomagnetic field was at quiet to unsettled levels.

.Forecast...
The geomagnetic field is expected to be at quiet to unsettled levels for
the remainder of day one (26 Jun) due to waning CH HSS effects. Mostly
quiet conditions are expected on day two (27 Jun) and into early on day
three (28 Jun). Quiet to unsettled conditions are likely late on day
three (28 Jun) due to the anticipated influence from an additional weak,
positive polarity CH HSS.



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