Area Forecast Discussion
Issued by NWS Rapid City, SD

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000
FXUS63 KUNR 121711
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
1111 AM MDT Thu Oct 12 2017

.DISCUSSION...(Today Through Wednesday)
Issued at 240 AM MDT Thu Oct 12 2017

Upper level analysis has broad trof across the western CONUS with
southwest upper flow across the Northern Plains. Skies are partly
cloudy across the area. At the surface, a strong cold front is
located from western ND into eastern WY. Winds ahead of the front
are out of the south at 10 to 25 mph, and out of the northwest
behind the front. Temperatures at 3am are in the 40s to lower 50s.

Strong cold front will continue to move through the forecast area
today, exiting south central SD around mid afternoon. Strong
pressure rises behind the front will create gusty northwest winds
across much of the western SD plains. Temperatures will range
from the 50s across the northwestern third of the CWA to the lower
70s across south central SD. A few rain/snow showers will be
possible late tonight, mainly across southern SD.

Friday will be dry with highs in the mid 50s to mid 60s as
southwest flow continues aloft. By Saturday, the main upper trof
will finally cross the Northern Plains, with the associated cold
front bringing breezy west to northwest winds. Additionally, this
system will bring a slight chance for rain and snow showers, with
minimal accumulations. Highs Saturday will cool into the 40s and
lower 50s. Following this trof, several days of mild and dry
weather are expected as upper ridging builds over the western
CONUS.

&&

.AVIATION...(For the 18Z TAFS Through 18Z Friday)
Issued At 1109 AM MDT Thu Oct 12 2017

VFR conditions expected through the forecast period. Gusty
northerly winds on the SD plains will subside this evening and
then become breezy from the south on the SD/WY plains Friday.

&&

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

$$

DISCUSSION...15
AVIATION...Helgeson



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