Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 142057

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
257 PM MDT Sat Oct 14 2017

.DISCUSSION...(This Evening Through Saturday)
Issued at 256 PM MDT Sat Oct 14 2017

Water vapor imagery shows an broad upper trough centered across the
central third of the COUNS with the main axis now crossing the CWA.
KUDX radar shows rain showers quickly dissipating as the move
eastward across south central to southwest SD. This trend will
continue through the late afternoon as the drier air enters the CWA
behind the departing wave. Skies will clear out early this evening
with lows dropping into the 20s to low 30s. Models are showing a
fast moving wave pushing through northeastern MT into ND late
tonight into Sunday. With dry air over the region, no precip will
occur. Instead some passing clouds and a return of gusty northwest
winds...though not as strong as today. Highs will be in the 50s to
mid 60s. Low amplitude ridging can be expected Monday and Tuesday
with temperatures warming into the 70s across most locations. Upper
flow becomes more zonal for the second half of the week, but
dry weather and highs mostly in the 70s will continue.


.AVIATION...(For the 18Z TAFS Through 18Z Sunday)
Issued At 1121 AM MDT Sat Oct 14 2017

Showers will move east this afternoon, exiting the area early this
evening. Some snow will occur over the higher elevations. Isolated
thunderstorms will wind down over central SD early this afternoon.
Gusty northwest winds are expected through 00z. Areas MVFR CIGS
expected this afternoon with local IFR conditions with heaviest
precipitation. VFR conditions will overspread the area tonight.




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