Area Forecast Discussion
Issued by NWS Cheyenne, WY

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301
FXUS65 KCYS 222204
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
404 PM MDT Wed Mar 22 2017

.SHORT TERM...(This evening through Friday night)
Issued at 357 PM MDT Wed Mar 22 2017

Main focus will be with the storm system that will affect the CWA
mainly late Thursday into Friday. Difficulty will be with snowfall
amounts. Models have nudged the track of this system a little
farther south again and are not quite as cold thus snow amounts
look to be a little less overall. Over the plains snowfall likely will
be greater than what accumulates given warm ground and marginal
temperatures. The worst conditions look like they will be later
Thursday evening into Friday morning over the South Laramie Range
where combination of snow and stronger winds may make for quite
difficult driving conditions. Have opted to post a Winter Storm
Watch for that area as a general 4-6 inches of snow looks a decent
bet along with winds gusting to around 40 mph at that time. Some
accumulating snows should also extend east along the I-80 corridor
into the far southwestern Neb Panhandle but amounts less with a
little warmer temperatures. Will still have to watch that area as
heavier snow could occur if temperatures turn out a little cooler
than expected.

Conditions will improve during the day Friday as the surface/upper
lows move into the Kansas/Oklahoma area with clearing skies and
subsiding winds. Short upper ridge moves across Friday and Friday
night boding for clear and dry weather.

.LONG TERM...(Saturday through Tuesday)
Issued at 404 PM MDT Wed Mar 22 2017

A series of upper level low pressure systems will keep the weather
relatively active for southeast Wyoming and western Nebraska
Panhandle through the weekend. The first system will track across
the Desert Southwest Saturday into Sunday with a mix of rain/snow
possible across our forecast area Saturday evening through
Sunday. Monday looks mostly dry, but the next system will track
across the Great Basin and into the Rockies Monday night and
Tuesday, bringing increased chances for precipitation through this
time. Temperatures overall will remain slightly above normal for
this time of year. Winds will remain quite tame across the area as
well.

&&

.AVIATION...(For the 18Z TAFS through 18Z Thursday afternoon)
(Issued at 404 PM MDT Wed Mar 22 2017

South to southwest winds will remain quite breezy this afternoon,
with gusts 20-30 kt will common across the area. Higher speeds
will occur at times at KLAR. Winds will diminish overnight.
Isolated thunderstorms will form over the mountains this
afternoon, with widely scattered showers possible tonight. The
next storm system will bring more widespread chances for precip
and gusty winds on Thursday.

&&

.FIRE WEATHER...
Issued at 404 PM MDT Wed Mar 22 2017

No concerns expected for the most part through the weekend with
cooler and more moist conditions expected. Conditions may approach
critical levels briefly Thursday afternoon over the southern Neb
Panhandle as humidities may lower into the 10-15% range but winds
look too low at that time.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Winter Storm Watch from Thursday evening through Friday morning
     for WYZ116-117.

NE...None.
&&

$$

SHORT TERM...RE
LONG TERM...RJM
AVIATION...RJM
FIRE WEATHER...RE



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