Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 160502

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1002 PM MST Sat Dec 15 2018

.DISCUSSION...(This Evening Through Saturday)
Issued at 210 PM MST Sat Dec 15 2018

Current surface analysis shows low pressure over south central
Canada, with a cold front stretching southward across the western
Dakotas. Upper level analysis shows weak shortwave energy sliding
into the central Dakotas, with broad and weak ridging to the west
of the region. Band of mid and high clouds earlier today has
moved east of the area. Breezy west to northwest winds have
developed behind the front, with temps mostly in the 40s and
lower 50s.

Quiet and mild weather is expected for the next several days as
ridge rebuilds over the Rockies and moves across the Plains. Highs
will be in the 40s to mid 50s Sunday through Tuesday. As ridge
shifts east of the region toward midweek, the next shortwave
disturbance and cool front will cross the area. It should bring
gusty winds and the possibility for mostly isolated showers, but it
looks like a mainly dry system. Ridging will likely rebuild behind
the exiting system for late week, with mild air remaining in place
for Thursday and Friday. The region could see a bit more of an
active pattern and cooler conditions toward next weekend as ridge is
forecast to flatten out over the Rockies. However, any systems that
do come through in west to northwest flow look to be on the weak
side and moisture starved.


.AVIATION...(For the 06Z TAFS Through 06Z Sunday Night)
Issued At 1001 PM MST Sat Dec 15 2018

VFR conditions expected through the period.




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