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Area forecast discussion
National Weather Service Cheyenne Wyoming
430 PM MST Tue Dec 12 2017

Short term...(this evening through thursday)
issued at 232 PM MST Tue Dec 12 2017

Quiet weather will be over the County Warning Area overnight into weds with mainly
clear skies. A clipper-type system will dive southeast across the
northern plains overnight and push a cold front across the County Warning Area but
only effect will be a breezy to windy day across the plains weds
with Max temps about 10-15 degrees cooler than today. Another
shortwave will then pass across the County Warning Area weds night and should
bring some snow showers to mainly western parts as well as another
push of cooler air. Thursday looks to be cool and blustery
especially over the plains under fast northerly mid-level flow.
Some mtn snow showers also expected.

Long term...(thursday night through tuesday)
issued at 232 PM MST Tue Dec 12 2017

Dry and warmer conditions for Friday as a short upper ridge passes
across the region. Could be some strong winds in the wind prone
areas Friday as Lee troughing increases the pressure gradient over
the High Plains. A stronger shortwave then passes across Saturday
and should bring more widespread rain and snow to the County Warning Area along
with the next cold front. Not looking like a lot of snow as the
system will be fast-moving. Clearing Saturday night as the
shortwave moves southeast and away from the area. Mainly dry
Sunday through Tuesday with some windy periods especially Monday
as a fast west-northwesterly flow sets up over the region. Chilly
on Sunday then warming Monday through Tuesday.


Aviation...(for the 00z tafs through 00z Wednesday afternoon)
issued at 430 PM MST Tue Dec 12 2017

West to northwest winds will be breezy through Wednesday east of the
Laramie range with gusts 25 to 35 knots. Winds will be lighter at krwl
and klar. Clouds will increase and lower from west to east Wednesday
as a clipper system and cold front approach Wednesday afternoon. Ceilings
will remain VFR, but may lower to MVFR along and west of the Laramie
range after 00z Thursday.


Fire weather...
issued at 232 PM MST Tue Dec 12 2017

Fire weather concerns will be low for the rest of the week as a
trend towards cooler temperatures sets up and min humidities
remain well above critical levels. A fast moving system should
bring some snow showers mainly around the mtns late weds with the
next system due on Saturday. There will be some windy periods
mainly around the mtns through the rest of the week.


Cys watches/warnings/advisories...


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