920 
FXUS63 KUNR 101118
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
518 AM MDT Wed Oct 10 2018

.DISCUSSION...(Today Through Tuesday)
Issued at 301 AM MDT Wed Oct 10 2018

Current upper level analysis has large trof over the western CONUS
with one strong shortwave lifting north through the Dakotas and
Minnesota, and the second sliding across northern Utah. Skies are
mostly cloudy across the Dakotas with widespread light to moderate
snow occurring. At the surface, low pressure is located across 
Iowa with large Canadian high pressure over central Saskatchewan. 
Boundary layer flow is predominately out of the north, with 3am 
temperatures in the lower 30s.

Large upper level shortwave and and associated snow band will
gradually shift north and east of the forecast area this morning.
Another 1 to 2 inches of snow is expected across southwest into
central South Dakota this morning before the snow finally tapers
off by early afternoon. Breezy north winds will produce some areas
of lower visibility at times. A Winter Weather Advisory remains 
in place for this area through about noon. Cloudy skies are 
expected for the remainder of the day with highs only in the mid 
to upper 30s. 

Wednesday night into Thursday looks mainly dry, but still cold as
the next system over Utah slides east through the Rockies. As it 
eventually moves through the Central Plains later Thursday to 
early Friday, there could be some rain/snow showers across 
northeast WY, the Black Hills, and southern SD. Friday looks to be
the nicest day of the week, at least with regard to temperatures.
Highs will be in the mid 40s to lower 50s. 

A clipper system will then move southeast across the Northern Plains 
on Saturday, with gusty winds and some rain/snow showers expected, 
especially across northeast WY and the Black Hills area. 
Temperatures will drop well below average again behind the front, 
with highs in the 30s on Sunday. Another clipper system could 
impact the area Monday night into Tuesday. 

&&

.AVIATION...(For the 12Z TAFS Through 12Z Thursday Morning)
Issued At 517 AM MDT Wed Oct 10 2018

Widespread IFR/LIFR conditions will continue this morning due to
low clouds/snow. Conditions will be slow to improve this
afternoon, but noticeable improvement should occur from northwest
to southeast tonight as drier air filters into the area.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...Winter Weather Advisory until noon MDT /1 PM CDT/ today for 
     SDZ014-032-042>044-046-047-049.

WY...None.
&&

$$

DISCUSSION...15
AVIATION...Helgeson