Area Forecast Discussion
Issued by NWS Rapid City, SD

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FXUS63 KUNR 250854
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
254 AM MDT Mon Sep 25 2017

.DISCUSSION...(Today Through Sunday)
Issued at 254 AM MDT Mon Sep 25 2017

Water vapor shows compact low lifting through Wyoming, bringing
showers to northeast Wyoming/western South Dakota. Temperatures
cold enough for snow in the higher elevations of the Black Hills.
Could be a light dusting of snow in the higher Black Hills over
the next few hours. The low lifts into western North Dakota by
this evening. The best chance of precipitation will be this
morning for northeast Wyoming into western South Dakota, with
higher pops in to south central South Dakota this evening.
Decreasing clouds tonight with isolated showers lingering. With
some clearing and light winds, patchy frost expected across
northeast Wyoming into far southwest South Dakota.

Dry northwest flow across the area through Thursday, with weak
ridging in split flow for the end of the week. Dry weather
expected for the remainder of the week with temperatures
returning to near average for the last half of the week.

&&

.AVIATION...(For the 06Z TAFS Through 06Z Monday Night)
Issued At 1107 PM MDT Sun Sep 24 2017

Widespread IFR conditions are expected tonight. Isolated to
scattered showers will occur. LIFR conditions are expected over
parts of northeastern Wyoming, the Black Hills and over parts of
southwestern and south central South Dakota. Conditions will
improve to MVFR over most areas by 17Z on Monday with VFR
conditions developing over most of the area by 20Z on Monday
afternoon.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...None.
&&

$$

DISCUSSION...7
AVIATION...10



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