Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 261811

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1211 PM MDT Wed Apr 26 2017

.SHORT TERM...(Today Through Thursday Night)
Issued at 422 AM MDT Wed Apr 26 2017

Upper level analysis has large trof over the central CONUS with
weakening closed low over the Dakotas. Skies are cloudy across the
Northern Plains with some light snow lingering across central and
eastern South Dakota. At the surface, Canadian high pressure has
moved into western areas with boundary layer winds out of the
north to northwest at 10 to 20 mph. Temperatures at 4 am are in
the 20s to lower 30s.

Today...Northern Plains remains on the backside of the upper low
as Canadian surface high settles in. The area will have a break
from precipitation today, but temperatures will remain well below
average. Low stratus deck will slowly deteriorate from west to
east today with some sun coming through by the afternoon. Highs
will only struggle into the 40s today most areas - coolest across
areas that received fresh snowfall. Cold conditions will return
tonight as temperatures fall back into the 20s. Clouds will be
on the increase late tonight in advance of the next weather

Thursday...Next upper shortwave will move into the area on
Thursday. Mostly cloudy skies are expected with precipitation
moving into Northeast Wyoming by midday, and into the Black Hills
area by late afternoon. Initial precip will be mainly rain, but as
temperatures fall Thursday night, additional snow is expected.
After highs in the 40s, temperatures will fall quickly into the
30s in the evening, with rain changing to snow. With the Canadian
surface high across ND and eastern SD, precip will mainly be
confined to Northeast WY and southwestern SD through Thursday
night. Model consensus places about 1 to 4 inches of snow across
the Black Hills into Northeast WY for Thursday night into early
Friday morning, with some higher amounts possible across southern
portions of Campbell County.

.LONG TERM...(Friday Through Tuesday)
Issued at 422 AM MDT Wed Apr 26 2017

Friday will remain mostly cloudy across the area with light snow
continuing across Northeast WY and southwestern SD. A mix of light
rain and snow will be possible by the afternoon as temperatures
slowly climb into the 40s...some low 50s further north and east.
This system will slowly settle south and east of the area Friday
night with precipitation finally tapering off across the area.
Another cold night in store for the area, with 20s and 30s for
lows Friday night.

The weekend looks mostly decent at this point, but still on the
cooler side, with temps below average. Temps will likely get back to
near average levels early next week, but some unsettled weather
looks to return. Will have chances for showers in most areas each
day, with Tuesday looking to have the better potential right now.


.AVIATION...(For the 18Z TAFS Through 18Z Thursday)
Issued At 1204 PM MDT Wed Apr 26 2017

Widespread MVFR cigs will continue to slowly burn off this
afternoon. VFR conditions expected tonight most places with some
potential for MVFR cigs over portions of NE WY.




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