Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 070910

Area Forecast Discussion
National Weather Service Cheyenne WY
210 AM MST Thu Dec 7 2017

.SHORT TERM...(Today through Saturday)
Issued at 210 AM MST Thu Dec 7 2017

Weak impulse that brought some light snow showers to far se Wy
and the sw Neb Panhandle moving south of the area now with snow
tapering off. Even some clearing noted on satellite over se Wy
early this morning.

Main concerns this period will focus on winds, especially over
the plains on Friday. One more ripple of energy looks like it will
drop south across the CWA this afternoon and could bring some
snow showers once again, mainly to the mtns of se Wy as well as
the adjacent plains. A bit warmer today but blustery as a decent
northerly breeze will exist. Warmer conditions then arrive on
Friday and Saturday as the cold surface airmass over the plains
slips east and surface downslope flow develops. A belt of pretty
strong mid level northerly winds will persist over the high plains
on Friday with 850H winds of 35-40kts over the Panhandle so
looking pretty windy there as some mixing will occur. A decent
surface pressure gradient may set up near the Laramie range Friday
and could allow winds to get close to high wind levels though the
direction is not favorable. Otherwise mainly dry across the CWA
after today.

.LONG TERM...(Saturday night through Wednesday)
Issued at 210 AM MST Thu Dec 7 2017

Weather dominated by ridge of high pressure to the west. We stay
in northwest flow. Clipper systems look to stay east of Wyoming
and western Nebraska. Dry forecast expected through Thursday.


.AVIATION...(For the 06Z TAFS through Thursday evening)

MVFR CIGS and light snow flurries will continue east of Interstate
25, mainly affecting the western Nebraska panhandle terminals late
tonight before conditions briefly improve by sunrise Thursday.
Another disturbance will move across Wyoming and Colorado on
Thursday, with CIGS lowering to near MVFR and snow showers
redeveloping by noon. Location and timing of these snow showers are
highly uncertain at this time, so will add VCSH over the southeast
Wyoming terminals for now. Winds are expected to be gusty across the
high plains on Thursday, with gusts between 25 to 35 knots expected.


Issued at 210 AM MST Thu Dec 7 2017

Breezy to windy conditions will persist mainly east of the mtns
today through Friday with a bit less wind on Saturday. Min
humidities well above critical thresholds today then they do get
down to around 20 percent across far se Wy into the southern Neb
Panhandle both Friday and Saturday so a bit of an elevated
concern there.




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