Space Weather Forecast Discussion
Forecast Discussion
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
Issued: 2019 May 19 1230 UTC

Solar Activity
.24 hr Summary...
Solar activity was very low. Region 2741 (N05 Lo=274) rotated around the limb leaving the visible disk spotless. No Earth-directed CMEs were observed in available satellite imagery.
Solar activity is expected to remain very low on 19-21 May.

Energetic Particle
.24 hr Summary...
The greater than 2 MeV electron flux reached moderate levels. The greater than 10 MeV proton flux were at background levels.
The greater than 2 MeV electron flux is expected to be at normal to moderate levels on 19-21 May. The greater than 10 MeV proton flux is expected to continue at background levels.

Solar Wind
.24 hr Summary...
Solar wind parameters, as measured by the DSCOVR spacecraft, indicated near-background conditions. Total magnetic field strength was at or below 5 nT for most of the period. Solar wind speeds ranged from 372-428 km/s. Phi angle was oriented in the positive sector.
Near-background solar wind conditions are expected on 19 May. A weak enhancement associated with a recurrent, negative polarity CH HSS is anticipated on 20-21 May.

.24 hr Summary...
The geomagnetic field was quiet.
The geomagnetic field is expected to be mostly quiet on day one (19 May). Quiet to unsettled levels are expected on days two and three (20-21 May) due to the anticipated arrival of a recurrent, negative polarity CH HSS.
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