Routine Space Environment Product (Daily)
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14
000
FXXX12 KWNP 251230
DAYDIS

:Product: Forecast Discussion
:Issued: 2017 Mar 25 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 at very low levels and Region 2643 (N08E29,
Hrx/alpha) was steady throughout the period. No Earth-directed CMEs
were observed in available coronagraph imagery.

.Forecast...
Solar activity is expected to continue at very low levels throughout the
forecast period (25-27 Mar).

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux was at high levels with a peak flux
of 11,500 pfu observed at 24/1605 UTC. The greater than 10 MeV proton
flux was steady at background levels throughout the period.

.Forecast...
The greater than 2 MeV electron flux is expected to continue at high
levels on days one and two (25-26 Mar) with normal to moderate levels
expected on day three (27 Mar) due to elevated geomagnetic field
activity.

Solar Wind

.24 hr Summary...
Solar wind parameters, as measured by the DSCOVR spacecraft, reflected
subsiding influence from a positive polarity CH HSS. Total magnetic
field strength remained below 5 nT while the Bz component was variable
between -2 and +4 nT. Solar wind speeds gradually declined from 575 km/s
to around 500 km/s through the reporting period. Phi angle was primarily
oriented in the positive sector.

.Forecast...
Solar wind parameters are expected to a gradual trend towards a slow
solar wind environment through days one and into day two (25-26 Mar).
Late on day two (26 Mar), the onset of a CIR ahead of negative polarity
CH HSS is expected to enhance the solar wind environment through day
three (27 Mar).

Geospace

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

.Forecast...
The geomagnetic field is expected to be quiet to unsettled on day one
through late on day two (25-26 Mar) as CH HSS influence continues to
wane. On day three (26 Mar), an anticipated onset of a CIR preceding the
influence of a negative polarity CH HSS is likely to result in active
conditions accompanied by isolated G1 (Minor) geomagnetic storm periods.



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.