Routine Space Environment Product (Daily)
Issued by NWS

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000
FXXX10 KWNP 261230
DAYTDF

:Product: 3-Day Forecast
:Issued: 2017 May 26 1230 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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 26-May 28 2017 is 4 (below NOAA
Scale levels).

NOAA Kp index breakdown May 26-May 28 2017

            May 26     May 27     May 28
00-03UT        1          4          3
03-06UT        1          3          2
06-09UT        1          3          2
09-12UT        1          3          2
12-15UT        2          3          2
15-18UT        3          3          2
18-21UT        4          4          2
21-00UT        4          4          3

Rationale: Unsettled to active conditions are expected, with a slight
chance for G1-Minor storm conditions, by midday on day one (26 May),
with the arrival of the 23 May CME. Unsettled to active conditions are
expected to continue on days two and three (27-28 May) with weak CME
effects underway.

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 May 26-May 28 2017

              May 26  May 27  May 28
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 May 26-May 28 2017

              May 26        May 27        May 28
R1-R2            5%            5%            5%
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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