Area Forecast Discussion
Issued by NWS Rapid City, SD

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000
FXUS63 KUNR 311914
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
114 PM MDT Sat Oct 31 2020

.DISCUSSION...(This Evening Through Saturday)
Issued at 114 PM MDT Sat Oct 31 2020

Potent clipper system will continue to shift SE across the region
this afternoon with gusty NW winds across most of the area.
Strongest core of LL winds now pushing into NW-Central SD and will
shift SE into south central SD this evening. Wind gusts have
struggled to reach warning levels so far today, but do expected a
small window to occur this afternoon as the mid cloud deck clears
out and peak mixing helps transport momentum to the sfc. Will
leave wind headlines as is, which covers peak mixing/jet core
timing concerns. Much cooler tonight as very dry air advects into
the region under clear skies and waning winds. Mean ridging then
progged through much of the following week with temps well above
seasonal norms. Highs will likely reach into the 70s a few days,
esp Tues-Wed in the lee of the Black Hills into scentral SD where
a few 80s are certainly possible. Dry pattern will continue with
no chances for precip until perhaps next weekend when a deep
western CONUS trough starts to push east. Much Colder weather
looks to return toward next Sunday-Monday as the western CONUS
trough builds east and cp/arctic air advects SE into the Northern
Plains. Snow will be possible with this pattern change, however
chances will hinge on the southward speed of the front and timing
of any ejecting impulses from the southern periphery of the
western CONUS trough.

&&

.AVIATION...(For the 18Z TAFS Through 18Z Sunday)
Issued At 1105 AM MDT Sat Oct 31 2020

Gusty northwest winds will diminish this evening. VFR conditions
are expected through the forecast period.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Wind Advisory until 6 PM MDT /7 PM CDT/ this evening for SDZ025-
     026-043-044-046-047-049-072.

     High Wind Warning until 6 PM MDT this evening for SDZ001-002-
     012>014-031-032-073.

WY...None.
&&

$$

DISCUSSION...JC
AVIATION...7


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