Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
279
FXXX10 KWNP 060031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2025 Aug 06 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
#
# 3-Day Forecast
#
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Aug 06-Aug 08 2025 is 2.67 (below NOAA
Scale levels).
NOAA Kp index breakdown Aug 06-Aug 08 2025
Aug 06 Aug 07 Aug 08
00-03UT 2.33 1.33 1.67
03-06UT 2.67 1.33 1.33
06-09UT 2.00 1.33 1.33
09-12UT 2.00 1.67 1.33
12-15UT 2.00 1.33 1.33
15-18UT 2.00 1.33 1.33
18-21UT 2.00 1.67 1.67
21-00UT 2.00 1.67 1.67
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No
significant transient or recurrent solar wind features are forecast.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for Aug 06-Aug 08 2025
Aug 06 Aug 07 Aug 08
S1 or greater 5% 5% 5%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Aug 05 2025 1553 UTC.
Radio Blackout Forecast for Aug 06-Aug 08 2025
Aug 06 Aug 07 Aug 08
R1-R2 50% 50% 50%
R3 or greater 10% 10% 10%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts,
and a slight chance for R3 (Strong) or greater radio blackouts all three
days.