Subj : 3 Day Space Weather Forecast
To   : All
From : Sean Dennis
Date : Tue Mar 10 2026 12:19 am

:Product: 3-Day Forecast
:Issued: 2026 Mar 10 0030 UTC
# Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction 
Center
#
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 Mar 10-Mar 12 2026 is 2.67 (below NOAA
Scale levels).

NOAA Kp index breakdown Mar 10-Mar 12 2026

             Mar 10       Mar 11       Mar 12
00-03UT       2.67         1.67         1.67     
03-06UT       2.67         1.33         1.33     
06-09UT       2.33         1.33         1.33     
09-12UT       2.00         1.33         1.33     
12-15UT       1.00         1.33         1.33     
15-18UT       1.00         1.33         1.67     
18-21UT       1.67         1.67         1.33     
21-00UT       2.00         1.67         1.67     

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 Mar 10-Mar 12 2026

              Mar 10  Mar 11  Mar 12
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 Mar 10-Mar 12 2026

              Mar 10        Mar 11        Mar 12
R1-R2           20%           20%           20%
R3 or greater    1%            1%            1%

Rationale: There exists a slight chance for R1-R2 (Minor-Moderate) radio
blackouts over 10-12 Mar.


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