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Area forecast discussion for western South Dakota and northeastern Wyoming 
National Weather Service Rapid City South Dakota
452 am MDT Friday may 29 2015

Short through Saturday night
issued at 234 am MDT Friday may 29 2015

Current water vapor images show upper low over northern Manitoba
with a trough extending southward into southwestern South
Dakota. At the surface a cool front and an associated area of
showers was moving southward across northestern Wyoming and western South Dakota. The
showers and a few thunderstorms will continue to move southward
across the area this morning with subsidence and drying moving
into the region from the north. Dry weather is expected tonight
and on Saturday as high pressure builds over the region. Cooler
than average temperatures are expected today...with slightly
warmer temperatures on Saturday.

Long term...Sunday through Thursday
issued at 234 am MDT Friday may 29 2015

Ridge axis will move over The Rockies Sunday and shift
eastward over the northern plains Monday...allowing above average
temperatures to return to the area. Mainly dry weather is expected
on Sunday...but weak energy passing through the ridge may produce
some showers and thunderstorms Sunday into Monday. Greater
precipitation chances return for the middle to latter part of next
week as a western trough redevelops and upper flow over the northern
plains becomes southwesterly. Highs next week will be near seasonal


Aviation...(for the 12z tafs through 12z Saturday morning)
issued at 451 am MDT Friday may 29 2015

Rain showers will continue to move southward through the County Warning Area
today. MVFR ceilings/visibilities will be common with the heavier
precipitation...with some local IFR to LIFR conditions in the higher
elevations. Skies will clear from north to south this
afternoon...and conditions will become VFR by early evening.


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


Short term...10
long term...pojorlie

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