Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 122132

Area Forecast Discussion
National Weather Service Cheyenne WY
232 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 CWA 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 CWA 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 CWA 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 CWA 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 18Z TAFS through Wednesday morning)

VFR conditions are expected through tonight. Although winds will be
relatively light compared to the last several days, gusts up to 30
kts are possible for a few hours this afternoon across the eastern


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.




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