Subj : 3 Day Space Weather Forecast
To   : All
From : Sean Dennis
Date : Sun Feb 22 2026 12:19 am

:Product: 3-Day Forecast
:Issued: 2026 Feb 22 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Feb 22-Feb 24 2026 is 4.67 (NOAA Scale
G1).

NOAA Kp index breakdown Feb 22-Feb 24 2026

             Feb 22       Feb 23       Feb 24
00-03UT       2.67         3.67         3.67     
03-06UT       3.67         4.67 (G1)    3.67     
06-09UT       2.67         3.67         2.67     
09-12UT       1.67         3.67         2.67     
12-15UT       2.67         2.67         2.00     
15-18UT       2.67         2.67         1.67     
18-21UT       3.67         2.67         1.67     
21-00UT       3.67         3.67         2.67     

Rationale: G1 (Minor) geomagnetic storms are likely on 23 Feb due to
effects from an anticipated coronal hole HSS.

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 Feb 22-Feb 24 2026

              Feb 22  Feb 23  Feb 24
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 Feb 22-Feb 24 2026

              Feb 22        Feb 23        Feb 24
R1-R2            5%           10%           10%
R3 or greater    1%            1%            1%

Rationale: There exists a slight chance for R1-R2 (Minor-Moderate) radio
blackouts over 23-24 Feb.


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