Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 182145

Area Forecast Discussion
National Weather Service Cheyenne WY
245 PM MST Thu Jan 18 2018

.SHORT TERM...(This evening through Saturday)
Issued at 245 PM MST Thu Jan 18 2018

Mainly quiet weather expected over the CWA through Friday night
other than some strong winds in the wind-prone areas such as the
Bordeaux and Arlington areas at times. Still not looking too
promising for the stronger winds over the South Laramie range but
will keep the High Wind Watch up and see if new model data/trends
necessitate an upgrade. One more mild day across the CWA Friday
with max temps generally in the 50s outside of the mtns, with a
few lower 60s possible over the southern Neb Panhandle. Varying
amounts of high cloudiness will be over the area as ample moisture
stream over the region ahead of an upper trough that will reach
the west coast by late in the day. This system will bring a
significant change to our weather beginning Saturday as it
progresses over the desert SW and begins closing an upper low. Lee
cyclone will deepen over eastern Colorado during the day Saturday
and colder air will move south across the CWA. Expect to see snow
reach the far western and northwest parts of the CWA during the
day Saturday, initially over the higher mtns. Have posted Winter
Storm watches for those areas beginning Saturday as moderate to
heavy snowfall should begin in those areas at that time. Far se Wy
into most of the Panhandle should see pcpn hold off until late in
the day.

.LONG TERM...(Saturday night through Thursday)
Issued at 245 PM MST Thu Jan 18 2018

Widespread snow will continue over the CWA Saturday night into
Sunday before tapering off late in the day. Should see decent
accumulations over most of the CWA, particularly western and
northern areas. May be some problems with blowing snow Sunday as
the surface low wraps up over Kansas and produces a healthy breeze
mainly east of the mtns. Clearing out Sunday night with generally
cool conditions Monday through Thursday. Weak impulses should
bring some periods of snow showers to mainly the mtns early next


.AVIATION...(For the 18Z TAFS through Friday morning)

VFR conditions expected this afternoon and tonight. SCT to BKN high
to mid level clouds with CIGS above 15000 ft AGL are expected. West
to southwest winds will become breezy at times from KCYS to KRWL,
with occasional gusts from 25 to 30 kt.


Issued at 245 PM MST Thu Jan 18 2018

Anticipate no Fire Weather concerns into at least early next week
with weather factors remaining non-critical. Mild again on Friday
then colder over the weekend with a winter storms system bringing
significant snow to much of the area especially Saturday night
into Sunday.


WY...Winter Storm Watch from Saturday morning through Sunday
     afternoon for WYZ103>105-109-111-112.

     Winter Storm Watch from Saturday afternoon through Sunday
     afternoon for WYZ101-102-106-107-110-114.

     High Wind Warning until noon MST Friday for WYZ106.

     High Wind Warning from midnight tonight to noon MST Friday for

     High Wind Watch from midnight MST tonight through Friday morning
     for WYZ116-117.



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