Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 101119

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
519 AM MDT Tue Oct 10 2017

.DISCUSSION...(Today Through Monday)
Issued at 333 AM MDT Tue Oct 10 2017

Upper level analysis has cut-off closed low over Kansas with
ridging building across the northern Rockies. Skies are currently
clear across the northern Plains. At the surface, high pressure is
located across the eastern Dakotas into Minnesota, with a weak lee
trof developing across central Montana. Temperatures at 3am are in
the 20s to lower 30s, with winds light out of the southwest.

Warmer air aloft will continue to build in today and Wednesday,
eventually allowing for a warming trend into midweek. Highs today
will mostly be in the mid 50s to mid 60s, with mid 60s to mid 70s
on Wednesday under sunny skies. Southerly winds will be breezy at
times this afternoon and again on Wednesday.

The next cold front is progged to move through late Wednesday night
into Thursday morning, bringing a slight cooldown for the end of
the week. Large scale trof will dig southeast across the western
US late in the week, with unsettled southwesterly flow developing
over the region. Chances for showers will increase late Thursday
night into Friday, especially over northern and western portions
of the forecast area. Upper trof is progged to eventually swing
across the area Friday night into Saturday, with chances for
showers persisting through at least Saturday night. Temps look
cold enough for light snow across at least the higher elevations
during the overnight and morning hours. Ridging behind the trough
should bring mainly dry and warmer conditions by early next week.


.AVIATION...(For the 12Z TAFS Through 12Z Wednesday Morning)
Issued At 517 AM MDT Tue Oct 10 2017

VFR conditions are expected through Wednesday morning. Breezy
southerly winds will occur this afternoon. Areas of LLWS will
occur over northeastern Wyoming and western South Dakota between
06Z and 12Z Wednesday morning.


SD...Freeze Warning until 10 AM CDT this morning for SDZ049.



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