Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 250518

Area Forecast Discussion
National Weather Service Cheyenne WY
1118 PM MDT Fri Mar 24 2017

.SHORT TERM...(This evening through Sunday)
Issued at 255 PM MDT Fri Mar 24 2017

Filling surface/upper low moving into western Oklahoma with
northerly flow over the CWA this afternoon. Clouds gradually
breaking up over the CWA as drier air advects into the region.
Expect clear skies across the CWA overnight into Saturday as a
short upper ridge passes across...with swly flow aloft returning
to the area by Saturday afternoon. After a cool night it will be
warmer again Saturday with highs attaining the 60s over most areas
outside of the mtns. A bit breezy out west Saturday afternoon in
favorable southwesterly flow. Next upper system then moves into
the region Saturday night into Sunday bringing sctd rain and snow
showers. Like this last system snow levels should be confined
mainly to the mtns with a little snow possibly reaching the
adjacent high plains by Sunday morning. Upper trof axis passes
across Sunday morning with clearing conditions Sunday afternoon.
Cooler Sunday with max temps about 10 degrees or so less from

.LONG TERM...(Sunday night through Friday)
Issued at 255 PM MDT Fri Mar 24 2017

Weak upper trough associated with the larger upper low tracking
east across New Mexico and Northern Texas will move east of our
area Sunday night with weak ridging aloft going southwesterly
Monday. A chance for some mountain snow and lower elevation rain
showers west of Interstate 25 Monday afternoon...with rain
spreading east out onto the plains Monday night possibly mixed
with snow by Tuesday another upper trough moves east
across our region in association with another strong upper low
tracking well to our south over the 4 Corners Region. Tuesday into
Wednesday we are expected fairly light snowfall accumulations
below 9000 ft elevation but higher peaks in the Snowy Range could
see several inches of snowfall but still looking to be below
Winter Storm Warning criteria (may eventually need some headlines
for areas above 9000 ft elevation out there...something to keep an
eye on). The third in this series of upper troughs moves east of
our area Thursday with another system moving in by Friday.


.AVIATION...(For the 06Z TAFS through 06Z Saturday night)
Issued at 1115 PM MDT Fri Mar 24 2017

VFR conditions and light winds expected through tonight. Minor
shortwave approaching the western terminals late tomorrow
afternoon will be enough to introduce a chance of showers starting
as early as 00z. Scattered showers will spread eastward through
the evening but VFR will continue to prevail. Winds will be
generally southerly or southwesterly tomorrow at 10 to 15 kt.


Issued at 255 PM MDT Fri Mar 24 2017

See no real concerns through the weekend into early next week with
mild temperatures and sufficiently high min humidities. Unsettled
weather pattern will bring chances for pcpn to the area every
couple of days into next week.




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