Routine Space Environment Product (Daily)
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482
FXXX12 KWNP 260032
DAYDIS

:Product: Forecast Discussion
:Issued: 2018 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 was very low with only weak B-class flare activity
observed from both Regions 2711 and 2712. Region 2710 (N17, L=223)
decayed to plage. Region 2711 (N06W55, Cso/beta) indicated decay in its
intermediate and trailer spots. Region 2712 (N14E56, Cao/beta) exhibited
weak leader spot development. No CMEs were observed in available
satellite imagery.

.Forecast...
Solar activity is expected to remain very low with a chance of C-class
flares all three days (26-28 May).

Energetic Particle

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

.Forecast...
The greater than 2 MeV electron flux is expected to remain at normal to
moderate levels all three days (26-28 May).

Solar Wind

.24 hr Summary...
Solar wind parameters were indicative of waning influence from a weak
positive polarity CH HSS. Solar wind speed decreased from about 440 km/s
to speeds approaching 350 km/s by periods end. Total field strength
ranged between 1-4 nT while the Bz component varied weakly between +/-2
nT. The phi angle was oriented in a steady positive sector.

.Forecast...
Solar wind parameters are expected to be at nominal levels on days one
and two (26-27 May). Weak enhancements are expected by day three (28
May) due to weak influence from a positive polarity, southward extension
from the northern crown CH HSS.

Geospace

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

.Forecast...
The geomagnetic field is expected to be quiet on days one and two
(26-27 May) under a nominal solar wind environment. By day three (28
May), quiet to unsettled conditions are expected due to weak influence
from a positive polarity, southward extension from the northern crown CH
HSS.



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