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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 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Sep 23-Sep 25 2018 is 5 (NOAA Scale
G1).

NOAA Kp index breakdown Sep 23-Sep 25 2018

            Sep 23     Sep 24     Sep 25
00-03UT        4          4          3     
03-06UT        5 (G1)     4          2     
06-09UT        4          3          2     
09-12UT        3          3          2     
12-15UT        3          2          2     
15-18UT        3          2          2     
18-21UT        4          2          2     
21-00UT        5 (G1)     3          2     

Rationale: G1 (Minor)geomagnetic storms are likely on day one (23 Sep)
due to the influence of a positive polarity CH HSS.

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 23-Sep 25 2018

              Sep 23  Sep 24  Sep 25
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 23-Sep 25 2018

              Sep 23        Sep 24        Sep 25
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.