184
FXXX10 KWNP 071231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Apr 07 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 Apr 07-Apr 09 2025 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Apr 07-Apr 09 2025

             Apr 07       Apr 08       Apr 09
00-03UT       3.00         4.00         2.67
03-06UT       3.00         3.67         2.33
06-09UT       2.00         3.00         2.00
09-12UT       1.67         3.00         2.00
12-15UT       1.67         2.67         2.00
15-18UT       2.67         2.33         1.67
18-21UT       4.00         2.00         2.33
21-00UT       4.00         1.67         2.33

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 Apr 07-Apr 09 2025

              Apr 07  Apr 08  Apr 09
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

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Apr 07-Apr 09 2025

              Apr 07        Apr 08        Apr 09
R1-R2           55%           55%           55%
R3 or greater   10%           10%           10%

Rationale: R1-R2 (Minor-Moderate) radio blackouts are likely, with a
slight chance for R3 (Strong), over 07-09 Apr.