Routine Space Environment Product (Daily)
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FXXX12 KWNP 241826

:Product: Forecast Discussion
:Issued: 2017 Jul 24 1825 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 under a spotless visible
disk. No Earth-directed CMEs were observed in available satellite

Solar activity is expected to be very low on days one through three
(24-26 Jul).

Energetic Particles

.24 hr Summary...
The greater than 2 MeV electron flux was at moderate to high levels with
a peak of 5,776 pfu observed at 23/1530 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 (24-26 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 speed began the period near 550 km/s,
increased to 707 km/s at 24/0416 UTC and gradually decreased to end the
period at about 600 km/s. Total field measurements ranged between 2 and
9 nT while the Bz component was variable between +/- 5 nT. The phi angle
was in a predominately positive orientation.

Solar wind parameters are expected to exhibit a gradual waning trend
towards nominal conditions throughout the forecast period (24-26 Jul).


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

The geomagnetic field is expected to be at predominately quiet to
unsettled levels on day one and two (24-25 Jul) as CH HSS influence
slowly wanes. Mostly quiet conditions are expected to prevail on day
three (26 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.