Routine Space Environment Product (Daily)
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000
FXXX12 KWNP 270032
DAYDIS

:Product: Forecast Discussion
:Issued: 2018 May 27 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. Region 2712 (N15E43, Cao/beta) produced a
few weak B-class flares and continued to show decay in the leader
portion of the region. Region 2711 (N07W70, Cro/beta) was quiet and
largely unchanged. No Earth-directed CMEs were observed in available
coronagraph imagery.

.Forecast...
Solar activity is expected to be very low over the next three days
(27-29 May). A chance for isolated C-class flare activity is possible on
27-28 May decreasing to a slight chance on 29 May due to Region 2711s
departure off the visible disk.

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached moderate levels and the
greater than 10 MeV proton flux was steady at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to reach moderate
levels each of the next three days (27-29 May). 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 were at background levels under a nominal solar
wind regime. Solar wind speeds steadily decreased through the period
from a peak of around 400 km/s at the beginning of the period to a low
of near 315 km/s at about 26/1530 UTC. Thereafter, and through periods
end, wind speeds increased slightly to near 350 km/s. Total field
strength ranged between 1-4 nT while the Bz component varied weakly
between +3 nT to -3 nT. Phi angle was in a predominately positive solar
sector with brief variablity into negative territory during the later
half of the period.

.Forecast...
Solar wind parameters are expected to persist at background levels on
day one (27 May). On day two (28 May) through day three (29 May), a
minor solar wind enhancement is expected in response to the influence of
a positive polarity CH HSS.

Geospace

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

.Forecast...
The geomagnetic field is expected to be quiet on day one (27 May) under
a nominal solar wind regime. On day two (28 May) through day three (29
May), the influence of a positive polarity, north polar-connected CH HSS
is expected to cause periods of unsettled conditions.



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