Routine Space Environment Product (Daily)
Issued by NWS
Issued by NWS
282
FXXX10 KWNP 091231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2025 Oct 09 1230 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 Oct 09-Oct 11 2025 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Oct 09-Oct 11 2025
Oct 09 Oct 10 Oct 11
00-03UT 1.00 1.67 2.33
03-06UT 0.67 1.67 2.00
06-09UT 2.00 1.67 2.33
09-12UT 1.67 1.00 2.33
12-15UT 1.33 1.33 3.00
15-18UT 1.33 1.33 3.33
18-21UT 1.67 1.33 3.67
21-00UT 1.67 1.67 4.00
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 Oct 09-Oct 11 2025
Oct 09 Oct 10 Oct 11
S1 or greater 5% 1% 1%
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
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Oct 09-Oct 11 2025
Oct 09 Oct 10 Oct 11
R1-R2 10% 25% 25%
R3 or greater 1% 5% 5%
Rationale: A slight chance for R1-2 (Minor-Moderate) radio blackouts
will remain for 09 Oct. R1-R2 (Minor-Moderate) probabilities increase to
a low chance on 10-11 Oct with the prospect of regions due to return.