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 15 16 17 18 19 20 21 22 23 24 25 26 27 28
000
FXXX12 KWNP 270031
DAYDIS

:Product: Forecast Discussion
:Issued: 2017 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 2659 (N14W45, Dai/beta) exhibited
areal growth and spot development this period but remained largely
unproductive.  No Earth-directed CMEs were observed in available
coronagraph imagery.

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

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux reached high levels with a peak
flux of 13,700 pfu observed at 26/1610 UTC.  The greater than 10 MeV
proton flux was steady at background levels.

.Forecast...
The greater than 2 MeV electron flux is expected to decrease to moderate
levels on days one and two (27-28 May) due to enhanced geomagnetic field
activity associated with the anticipated arrival of the 23 May CME.
Moderate to high electron fluxes are expected to return by day three (29
May) as CME influence subsides.

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 speed was between 300-355 km/s (anomalous
speed, density and temperature readings were observed between
25/2230-26/0230), total field strength values were steady at around 3
nT, and Bz varied between +2/-3 nT.  The phi angle remained steady in a
negative solar sector until 26/1810 UTC when it deflected into a mostly
positive sector.

.Forecast...
Solar wind parameters are expected to be enhanced on days one and two
(27-28 May) due to the anticipated arrival of the 23 May CME.
Near-background solar wind values are expected to return by day three
(29 May) as CME influence subsides.

Geospace

.24 hr Summary...
The geomagnetic field was quiet under a background solar wind
environment.

.Forecast...
The geomagnetic field is likely to reach active levels on day one (27
May) and unsettled levels on day two (28 May) due to the anticipated
arrival of the 23 May CME.  Generally quiet conditions are expected on
day three (29 May) with the return to a nominal solar wind regime.


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