:Product: 3-Day Forecast
:Issued: 2021 Jun 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 1 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Jun 22-Jun 24 2021 is 3 (below NOAA
Scale levels).

NOAA Kp index breakdown Jun 22-Jun 24 2021

            Jun 22     Jun 23     Jun 24
00-03UT        1          2          3     
03-06UT        1          2          2     
06-09UT        1          2          2     
09-12UT        1          1          2     
12-15UT        1          1          2     
15-18UT        2          1          2     
18-21UT        2          1          2     
21-00UT        2          1          2     

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 Jun 22-Jun 24 2021

              Jun 22  Jun 23  Jun 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 Jun 22-Jun 24 2021

              Jun 22        Jun 23        Jun 24
R1-R2            1%            1%            1%
R3 or greater    1%            1%            1%

Rationale: No R1 (Minor) or greater radio blackouts are expected.  No
significant active region flare activity is forecast.