Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX12 KWNP 260030
DAYDIS

:Product: Forecast Discussion
:Issued: 2015 May 26 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. The largest event of the
period was a B7 flare at 25/1957 UTC from an area of enhanced emission
on or behind the ESE limb. Regions 2349 (S20W62, Cao/beta) and 2353
(N07W45, Cao/beta) both indicated decay in their trailer spots and some
leader spot consolidation. The remaining regions were stable or in
slight decay. 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 (26-28 May).

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 this
period.

.Forecast...
The greater than 2 MeV electron flux is expected to be at predominately
normal levels over the next three days (26-28 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 were generally steady
averaging about 340 km/s. Total magnetic field strength varied between
1-4 nT while the Bz component varied between +4 to -2 nT. The phi angle
was variable between negative (towards) and positive (away) sectors
through about 25/1130 UTC before settling into a predominately negative
orientation.

.Forecast...
Solar wind parameters are expected to remain at nominal levels over
the next two days (26-27 May) through late on day three (28 May). Late
on the 28th, an enhancement in the solar wind environment is expected as
an equatorial, positive polarity coronal hole high speed stream (CH HSS)
moves into a goeeffective position.

Geospace

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

.Forecast...
The geomagnetic field is expected to persist at quiet levels over the
next two days (26-27 May) through late on day three (28 May). Late on
the 28th, quiet to unsettled conditions are expected as an equatorial,
positive polarity CH HSS moves into a goeeffective position.



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