150
FXXX10 KWNP 230031
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 May 23 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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 23-May 25 2025 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown May 23-May 25 2025

             May 23       May 24       May 25
00-03UT       2.00         2.33         2.00
03-06UT       2.00         2.67         2.33
06-09UT       1.67         3.00         3.00
09-12UT       2.67         3.67         3.67
12-15UT       2.67         3.00         3.00
15-18UT       4.00         2.33         2.33
18-21UT       2.67         1.67         2.33
21-00UT       2.67         1.67         1.67

Rationale: No G1 (Minor) or greater geomagnetic storms are expected.

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 May 23-May 25 2025

              May 23  May 24  May 25
S1 or greater    1%      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 May 23-May 25 2025

              May 23        May 24        May 25
R1-R2           25%           25%           25%
R3 or greater    5%            5%            5%

Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts over 23-25 May.