944
FXXX10 KWNP 301231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Jun 30 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 Jun 30-Jul 02 2025 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Jun 30-Jul 02 2025

             Jun 30       Jul 01       Jul 02
00-03UT       2.33         2.33         5.00 (G1)
03-06UT       2.00         2.33         4.00
06-09UT       2.33         2.33         2.67
09-12UT       3.33         2.33         2.67
12-15UT       1.67         3.33         3.00
15-18UT       1.67         3.33         4.33
18-21UT       2.33         3.33         4.00
21-00UT       2.67         4.00         5.00 (G1)

Rationale: G1 (Minor) geomagnetic storming is likely on 02 Jul with the
arrival of a CME that left the Sun on 28 Jun.

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 Jun 30-Jul 02 2025

              Jun 30  Jul 01  Jul 02
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 Jun 30-Jul 02 2025

              Jun 30        Jul 01        Jul 02
R1-R2           25%           25%           25%
R3 or greater    5%            5%            5%

Rationale: There is a chance of R1-R2 (Minor-Moderate) radio blackouts
through 02 Jul due to isolated M-class flare activity.