3-Day Forecast

Issued: 2026 Mar 08 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center and processed by SpaceWeatherLive.com

A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 5 (NOAA scale G1).

The greatest expected 3 hr Kp for Mar 08-Mar 10 2026 is 4 (.67NOAA scale G1).

NOAA Kp index breakdown

             Mar 08       Mar 09       Mar 10
00-03UT       4.67 (G1)    2.67         2.67     
03-06UT       3.67         2.67         3.00     
06-09UT       3.67         3.67         2.67     
09-12UT       2.67         2.67         2.33     
12-15UT       3.67         1.67         2.00     
15-18UT       4.67 (G1)    1.67         1.67     
18-21UT       3.67         2.67         1.67     
21-00UT       3.00         2.67         2.67     

Rationale

G1 (Minor) geomagnetic storms are expected on 08 Mar due to influence from a negative polarity coronal hole.

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 08-Mar 10 2026

              Mar 08  Mar 09  Mar 10
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 08-Mar 10 2026

              Mar 08        Mar 09        Mar 10
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 08-10 Mar.