394
FXXX10 KWNP 061231
DAYTDF

:Product: 3-Day Forecast
:Issued: 2025 Jun 06 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 06-Jun 08 2025 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Jun 06-Jun 08 2025

             Jun 06       Jun 07       Jun 08
00-03UT       2.33         3.33         4.00
03-06UT       2.00         3.67         3.67
06-09UT       2.33         3.00         3.00
09-12UT       2.33         2.33         3.00
12-15UT       3.00         2.00         2.33
15-18UT       2.67         3.00         2.00
18-21UT       2.33         3.67         2.00
21-00UT       2.67         4.67 (G1)    3.33

Rationale: G1 (Minor) geomagnetic storming is likely on 07 Jun due to
anticipated CME influence.

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 06-Jun 08 2025

              Jun 06  Jun 07  Jun 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

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jun 06-Jun 08 2025

              Jun 06        Jun 07        Jun 08
R1-R2           35%           35%           35%
R3 or greater    5%            5%            5%

Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts over 06-08 Jun.