Routine Space Environment Product (Daily)
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FXXX12 KWNP 281231

:Product: Forecast Discussion
:Issued: 2015 Nov 28 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
#             Forecast Discussion
Solar Activity

.24 hr Summary...
Solar activity was at very low levels.  Region 2459 (N04E25, Hrx/alpha)
produced the only flare of the period, a B4 at 27/1342 UTC.  Slight
growth was observed in the intermediate and trailing spots of Region
2458 (N08W00, Cao/beta).  The rest of the spotted regions were stable.
No Earth-directed coronal mass ejections were observed in available
coronagraph imagery.

Solar activity is expected to be at very low levels with a chance for
C-class flares over the next three days (28-30 Nov).

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux was at normal levels while the
greater than 10 MeV proton flux remained at background levels throughout
the period.

The greater than 2 MeV electron flux is expected to be at normal to
moderate levels over the next three days (28-30 Nov).  The greater than
10 MeV proton flux is expected to persist at background levels for the
forecast period.

Solar Wind

.24 hr Summary...
Solar wind parameters were at mostly ambient conditions with slightly
enhanced magnetic field strength.  Solar wind speeds averaged around 320
km/s with total field strength between 5 nT and 14 nT.  The Bz component
was mostly positive ranging from 14 nT to -11 nT.  Phi angle was
oriented in a negative (towards) sector.

A recurrent positive polarity coronal hole high speed stream (CH HSS) is
likely to become geoeffective late on day three (30 Nov).  Last
rotation, solar wind speeds reached the mid 700 km/s range, however
there was likely an embedded transient that could have caused some
enhancement.  STEREO A Plastic data had similar speeds occurring around
midday on 18 November as the CH HSS passed the spacecraft.  Although
there has been some weakening with the coronal hole, apparent in SDO/AIA
193 imagery, solar wind speeds reaching 600 km/s are possible.


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

The geomagnetic field is expected to be at quiet to unsettled levels
through late on day three (28-30 Nov).  By late on day three, a positive
polarity CH HSS is expected to become geoeffective causing unsettled to
active periods. is the U.S. government's official web portal to all federal, state and local government web resources and services.