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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 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for Apr 20-Apr 22 2018 is 6 (NOAA Scale
G2).

NOAA Kp index breakdown Apr 20-Apr 22 2018

            Apr 20     Apr 21     Apr 22
00-03UT        4          4          3     
03-06UT        5 (G1)     4          3     
06-09UT        6 (G2)     3          2     
09-12UT        6 (G2)     3          1     
12-15UT        5 (G1)     2          1     
15-18UT        3          2          1     
18-21UT        3          2          2     
21-00UT        4          3          2     

Rationale: G2 (Moderate) geomagnetic storm levels were observed during
the first half of the UTC day on day one (20 Apr) with G1 (Minor)
geomagnetic storm levels expected during the rest of the UTC day.

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 Apr 20-Apr 22 2018

              Apr 20  Apr 21  Apr 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 Apr 20-Apr 22 2018

              Apr 20        Apr 21        Apr 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.