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  NOAA 3 Day Space Weather Forecast
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The greatest observed 3 hr Kp over the past 24 hours was 1 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Sep 20-Sep 22 2018 is 4 (below NOAA
Scale levels).

NOAA Kp index breakdown Sep 20-Sep 22 2018

            Sep 20     Sep 21     Sep 22
00-03UT        1          1          2     
03-06UT        0          1          2     
06-09UT        0          2          3     
09-12UT        1          1          3     
12-15UT        2          1          3     
15-18UT        1          1          3     
18-21UT        2          2          4     
21-00UT        1          2          4     

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-15 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Sep 20-Sep 22 2018

              Sep 20  Sep 21  Sep 22
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 Sep 20-Sep 22 2018

              Sep 20        Sep 21        Sep 22
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.