:Product: Forecast Discussion
:Issued: 2019 Jun 18 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center
#
Solar Activity

.24 hr Summary...
Solar activity remained very low and the visible disk was spotless. No
Earth-directed CMEs were observed in available coronagraph imagery.

.Forecast...
Solar activity is expected to remain very low 18-20 Jun.

Energetic Particle

.24 hr Summary...
The greater than 2 MeV electron flux was at normal levels and the
greater than 10 MeV proton flux was at background values.

.Forecast...
The greater than 2 MeV electron flux is expected to be at normal to
moderate levels 18-20 June in response to minor CH HSS effects. The
greater than 10 MeV proton flux is expected to continue at background
levels.

Solar Wind

.24 hr Summary...
Solar wind parameters were indicative of a slow regime. Solar wind speed
was around 325 km/s and total IMF strength ranged primarily from 3 to 5
nT. The Bz component underwent weak deviations. The phi angle was
predominantly positive.

.Forecast...
The solar wind environment is anticipated to experience a mildly
enhanced and disturbed state on 18 Jun due to tenuous, isolated negative
polarity CH HSS influences. Any slight enhancements are likely to
continue into 19 and 20 Jun, but in a weakening state due to less
favorable geoeffective components.

Geospace

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

.Forecast...
Primarily quiet to unsettled conditions are expected on 18 Jun, with an
isolated active period likely later, due to minor CH HSS effects. 19-20
Jun are expected to experience mainly quiet to unsettled conditions as
any CH HSS influences weaken.