Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX10 KWNP 210030
DAYTDF

:Product: 3-Day Forecast
:Issued: 2017 Sep 21 0030 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
#             3-Day Forecast
#
A. NOAA Geomagnetic Activity Observation and Forecast

The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Sep 21-Sep 23 2017 is 3 (below NOAA
Scale levels).

NOAA Kp index breakdown Sep 21-Sep 23 2017

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

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-13 over the past 24 hours, was
below S-scale storm level thresholds.

Solar Radiation Storm Forecast for Sep 21-Sep 23 2017

              Sep 21  Sep 22  Sep 23
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 21-Sep 23 2017

              Sep 21        Sep 22        Sep 23
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.



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