Routine Space Environment Product (Daily)
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000
FXXX12 KWNP 270031
DAYDIS

:Product: Forecast Discussion
:Issued: 2015 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 remained at very low levels. No notable flare or spot
activity was observed from the four spotted regions currently on the
visible disk.  There are three large filaments on the visible disk that
require continued monitoring. No Earth-directed CMEs were observed in
available coronagraph imagery.

.Forecast...
Solar activity is expected to be at very low levels with a chance for
C-class activity over the next three days (27-29 May).

Energetic Particle

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

.Forecast...
The greater than 2 MeV electron flux is expected to be at predominately
normal background levels over the next three days (27-29 May) while the
greater than 10 MeV proton flux is expected to remain at background
levels throughout the forecast period.

Solar Wind

.24 hr Summary...
Solar wind parameters, measured at the ACE satellite, indicated a
nominal wind environment. Solar wind speeds averaged between 320 and 350
km/s. Total magnetic field strength varied between 5 nT and 12 nT while
the Bz component varied between -8 to +8 nT. The phi angle was
predominately negative (toward) before a solar sector boundary crossing
to a positive (away) orientation around 26/1600 UTC, accompanied by a
slight increase in wind speed and Bt.

.Forecast...
Solar wind parameters are expected to remain at nominal levels for day
one (27 May). An enhancement in the solar wind environment is expected
on days two and three (28-29 May) as an equatorial, positive polarity
coronal hole high speed stream (CH HSS) moves into a geoeffective
position.

Geospace

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

.Forecast...
The geomagnetic field is expected to persist at quiet levels for day one
(27 May). Quiet to unsettled conditions are expected on day two (28 May)
as an equatorial, positive polarity CH HSS moves into a geoeffective
position. Day three (29 May) may see peak activity as high as active
conditions from the CH HSS.



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