Routine Space Environment Product (Daily)
Issued by NWS

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FXXX12 KWNP 250031

:Product: Forecast Discussion
:Issued: 2017 Jul 25 0030 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
#             Forecast Discussion
Solar Activity

.24 hr Summary...
Solar activity remained at very low levels. There were no sunspots on
the visible disk. No Earth-directed CMEs were observed in available
satellite imagery.

Solar activity is expected to be very low on days one through three
(25-27 Jul).

Energetic Particles

.24 hr Summary...
The greater than 2 MeV electron flux was high levels with a peak of
14,800 pfu observed at 24/1720 UTC. The greater than 10 MeV proton flux
remained at background levels during the reporting period.

The greater than 2 MeV electron flux is expected to reach high levels
over the next three days (25-27 Jul). The greater than 10 MeV proton
flux is expected to remain at background levels throughout the forecast

Solar Wind

.24 hr Summary...
Solar wind parameters reflected the continued influence of a positive
polarity CH HSS. Solar wind speeds remained elevated, averaging around
625 km/s for most of the period. It did manage to peak at 707 km/s at
approximately 24/0416 UTC. Total field measurements ranged between 2 and
9 nT while the Bz component was variable between +/- 6 nT. The phi angle
was in a predominately positive orientation, with occasional rotations
into the negative sector towards the end of the period.

Solar wind parameters are expected to exhibit a gradual waning trend
towards nominal conditions throughout the forecast period (25-27 Jul).


.24 hr Summary...
The geomagnetic field was at quiet to unsettled levels due to continued
effects from a positive polarity CH HSS.

The geomagnetic field is expected to be at predominately unsettled to
active levels the first couple of periods on day one (25 Jul), before
decreasing to quiet to unsettled levels as CH HSS influence slowly
wanes. Mostly quiet conditions are expected to prevail on days two and
three (26-27 Jul) as nominal conditions return. is the U.S. government's official web portal to all federal, state and local government web resources and services.