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Area forecast discussion for western South Dakota and northeastern Wyoming 
National Weather Service Rapid City South Dakota
504 PM MDT Thu Oct 27 2016

Short term...(this evening through Friday night)
issued at 257 PM MDT Thu Oct 27 2016

Upper ridge covers the western conus, with northwest flow over
the northern plains and mid/high clouds streaming into the region.
At the surface, a trough stretches across the western Dakotas and
Mt/WY. Winds are southerly, and breezy across northeastern Wyoming.
Temperatures at 3 PM are in the 70s and lower 80s.

Southwest winds will become breezy across the County Warning Area tonight as the
surface trough passes through the region, and becoming northwest
behind the trough. The breezy winds will keep lows mild tonight,
in the 50s. Skies will be partly cloudy.

A weak upper wave will begin approaching the northern plains on
Friday. Cooler air will push into the area from the northwest, with
somewhat breezy winds across northwestern South Dakota. Highs will range from
the mid 60s across northeastern WY, the Black Hills, and
northwestern South Dakota to the lower 80s across south central South Dakota.
Precipitation will begin moving into the region Friday evening.
Models are in good agreement that it will remain rain, even in the
Black Hills. Would not be surprised if there were a few flakes of
snow over the higher elevations, but with no accumulation.

Long term...(saturday through thursday)
issued at 257 PM MDT Thu Oct 27 2016

Showers will continue across much of the County Warning Area Saturday
morning, gradually dissipating in the afternoon as the upper energy
shifts east. With cooler air flowing into the region, highs Saturday
will be only in the 50s. The upper ridge will rebound behind the
departing shortwave, with dry weather and warmer temperatures on
Sunday. Another shortwave trough will bring additional chances for
showers Sunday night through Monday, mainly across the northwestern
County Warning Area. Additionally, strong winds may accompany this system, along
with slightly cooler temperatures. Midweek will be dry with near
average temperatures.


Aviation...(for the 00z tafs through 00z Friday evening)
issued at 501 PM MDT Thu Oct 27 2016

VFR conditions will continue through the period. Some low level
wind shear possible overnight acrs wrn/cntrl South Dakota as a surface trof
moves through.


Unr watches/warnings/advisories...
South Dakota...none.


Short term...pojorlie
long term...pojorlie

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