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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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Dec 17-Dec 19 2017 is 5 (NOAA Scale
G1).

NOAA Kp index breakdown Dec 17-Dec 19 2017

            Dec 17     Dec 18     Dec 19
00-03UT        2          4          4     
03-06UT        2          5 (G1)     5 (G1)
06-09UT        2          5 (G1)     4     
09-12UT        2          4          3     
12-15UT        2          3          3     
15-18UT        3          3          3     
18-21UT        3          3          4     
21-00UT        4          4          4     

Rationale: G1 (Minor) geomagnetic storm conditions are likely on 18-19
Dec due to the anticipated 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 Dec 17-Dec 19 2017

              Dec 17  Dec 18  Dec 19
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 Dec 17-Dec 19 2017

              Dec 17        Dec 18        Dec 19
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.