Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 110538

Area Forecast Discussion
National Weather Service Cheyenne WY
1038 PM MST Sat Feb 10 2018

.SHORT TERM...(This evening through Monday)
Issued at 156 PM MST Sat Feb 10 2018

Tonight...Shortwave trough along the Colorado state line will move
to southeast Colorado late. We may see some light snow this evening
along the Wyoming-Colorado state line, otherwise dry. Even with
limited cloud cover, not expecting much fog development with
boundary layer winds from the west at decent speeds. Winds will
limit cooling, though still will see lows in the single digits.

Sunday...Our flow aloft turns westerly with warmer temperatures as
the cold air is scoured mostly to the east.

Sunday night...As the flow aloft backs to southwest in advance of
the next shortwave trough aloft, the low level cold air will surge
back westward into much of our counties, producing areas of freezing
fog along and east of the mountains. Will also see some light snow
developing north of a Douglas to Alliance line.

Monday...Considerably colder in the Canadian airmass behind the
front along with a chance of light snow on moist southwest flow

.LONG TERM...(Monday night through Saturday)
Issued at 156 PM MST Sat Feb 10 2018

Tuesday...Nice warming trend develops as the cold air is scoured out
with maximum temperatures in the mid 30s to upper 40s with 700 mb
temperatures near -4 Celsius.

Wednesday...As the flow aloft turns more northwest, relatively mild
temperatures will continue with a warming trend, though it looks
windy based on progged low and mid level gradients.

Thursday...Somewhat cooler with more cloud cover and brisk west
northwest flow aloft producing another windy day.

Friday...Windy again based on low and mid level gradients and deep
unidirectional northwest flow. Temperatures near normal.

Saturday...Flow aloft backs to westerly, producing a slight warming
trend. Continued windy with strong low and mid level gradients.


.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1035 PM MST Sat Feb 10 2018

In general, VFR prevails w/ SKC conditions. There is potential for
MVFR ceilings at KCDR/KAIA late in the period, after 00z Monday.


Issued at 156 PM MST Sat Feb 10 2018

Minimal concerns based on projected winds and humidities.




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