:Product: 3-Day Forecast
:Issued: 2021 Jul 07 1230 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 Jul 07-Jul 09 2021 is 3 (below NOAA
Scale levels).

NOAA Kp index breakdown Jul 07-Jul 09 2021

            Jul 07     Jul 08     Jul 09
00-03UT        1          2          2     
03-06UT        1          2          2     
06-09UT        2          1          2     
09-12UT        2          1          2     
12-15UT        1          2          1     
15-18UT        1          1          2     
18-21UT        1          1          3     
21-00UT        2          1          3     

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-16 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Jul 07-Jul 09 2021

              Jul 07  Jul 08  Jul 09
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 Jul 07-Jul 09 2021

              Jul 07        Jul 08        Jul 09
R1-R2           15%           10%            1%
R3 or greater    1%            1%            1%

Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts on Jul 07-08 due to the flare history of Region 2835.