Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 252224 AAA

Area Forecast Discussion...UPDATED
National Weather Service Cheyenne WY
424 PM MDT SUN SEP 25 2016

.SHORT TERM...(Tonight - Tuesday Night)

A gradual warming trend can be expected during the next few days as
upper-level ridging continues to build into the region. Chances for
precipitation through Tuesday night will be virtually zero along w/
mostly clear skies. The models show H7 temperatures climbing to +10
deg C or so by Tuesday afternoon, so expect daytime highs in the 75
to 85 degree range to the east of the Laramie Range.

.LONG TERM...(Wednesday through Sunday)
Issued at 255 PM MDT Sun Sep 25 2016

All models in generally good agreement into next weekend...showing
the upper level ridge axis remaining over Great Plains through
Thursday before some shortwave energy begins to lift northeast across
the Central Rockies by Friday and into next weekend. Models do show
some differences in timing with these the low
confidence is reflected with the POP forecast. High temperatures
will generally be in the 70`s to around 80 across most of the
forecast area...with the warmest temperatures across the lower
elevations of western Nebraska and far eastern Wyoming. Highs may
remain in the upper 60`s west of Interstate 25 later in the week
as some mid to high clouds enter the region. Kept POP around 20
percent late Friday through Sunday...mainly in the afternoon...for
some shower activity and isolated thunder across the mountains and
eastern plains as two shortwave disturbances move out of the Great
Basin region. The strongest one appears to move across southeast
Wyoming on sunday...ahead of the main Pacific trough digging
southeast into the Great Basin region. Will have to keep an eye on
this system as we head into the weekend...with long range models
showing 700mb temperatures ranging from -4c to -8c behind the cold
front and a greater chance of widespread precipitation.


.AVIATION...(For the 00Z TAFS through 00Z Monday evening)
Issued at 420 PM MDT Sun Sep 25 2016

VFR. Northwest-west winds 10-15 kt become light and variable early
this evening, then increase to 10-15 kt late Monday morning. Gusts
up to 20 kt for terminals east of the Laramie Range.


Issued at 211 PM MDT Sun Sep 25 2016

No major concerns with projected minimum RH values above 20 percent
through mid-week. It will be breezy at times, especially across the
typical wind corridors of southeast Wyoming, but overall conditions
will remain non-critical.


.CYS Watches/Warnings/Advisories...


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