Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 272040

Area Forecast Discussion
National Weather Service Cheyenne WY
240 PM MDT TUE SEP 27 2016

.SHORT TERM...(This evening through Thursday Night)
Issued at 230 PM MDT Tue Sep 27 2016

Pretty tranquil early fall weather to continue over the CWA
through Thursday with mild temperatures. Mainly clear skies
will persist through Wednesday with upper ridging extending
north over the CWA between an upper low around Lake Michigan
and a weaker low over the extreme sw CONUS. The sw upper low
will weaken and open Wednesday night then shear out over the
central Rocky mtn region later Thursday into Thursday night.
This should allow for at least a few showers over mainly the
mtns late Thursday as some moisture gets drawn into the area.
Otherwise a developing lee trof over the high plains Thursday
will create some gusty winds at that time.

.LONG TERM...(Friday through Monday)
Issued at 230 PM MDT Tue Sep 27 2016

Midlvl ridge axis will be located across central Nebraska on
Friday with a weak shortwave lifting northeastward across the CWA.
Isolated aftn showers/tstms will be possible in areas along the
Colorado border. A repeat will occur on Saturday as there is just
enough midlvl moisture to promote a slight chance of storms for
areas along and west of the Laramie Range. Winds will be weak and
temperatures slightly above normal through Saturday. A change in
the pattern will occur by Sunday as a longwave trough moves into
Idaho/Utah. Southwesterly flow aloft will strengthen ahead of it
on Sunday with an increase in winds, mainly to the west of the
Laramie Range. The consensus between the GFS/ECMWF has a fropa
sometime on Monday with cooler temps and gusty winds behind it.
Isolated to scattered storms may spread across the plains on
Sunday night in the upper level divergence.


.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1141 AM MDT Tue Sep 27 2016

Vfr conditions through the taf period. Winds will mostly be below
15 kts and cloud cover will be limited.


Issued at 230 PM MDT Tue Sep 27 2016

Concerns expected to remain low for the rest of the week with
mostly non-critical weather conditions. Some breezy conditions
on Wednesday otherwise mainly dry and mild.


.CYS Watches/Warnings/Advisories...


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