Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 120453

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1053 PM MDT Wed Oct 11 2017

.DISCUSSION...(This Evening Through Wednesday)
Issued at 227 PM MDT Wed Oct 11 2017

Broad upper trough covers the western CONUS, and
cirrus clouds are streaming through southwest flow into the
northern plains. At the surface, a trough stretches across the
western Dakotas and eastern MT/WY. Winds are generally southerly
around 10 kts across the CWA, and temperatures are mainly in the

Southwesterly winds will be somewhat breezy tonight ahead of the
surface trough, keeping lows across much of the western SD plains in
the 40s. However, a cold front will begin crossing the area late
tonight, and so western portions of the area will reach the 30s.

The cold front will slowly move through the region on Thursday,
creating gusty northwest winds across much of western SD.
Temperatures will range from the 50s across the northwestern third
of the CWA to the lower 70s across south central SD. A few rain/snow
showers will be possible Thursday night, mainly across southwestern

Friday will be dry with highs around 60, and then another cold front
will cross the region Saturday ahead of the upper level trough.
Along with breezy northwest winds, this system will bring rain and
snow showers, with minimal accumulations. Highs Saturday will cool
into the 40s and 50s. Following this trough, several days of mild
and dry weather are expected as upper ridging builds over the
western CONUS.


.AVIATION...(For the 06Z TAFS Through 06Z Thursday Night)
Issued At 1052 PM MDT Wed Oct 11 2017

VFR conditions will continue through the forecast period. Areas
of low level wind shear are expected overnight across the western
SD plains.




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