Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 252047

Area Forecast Discussion
National Weather Service Cheyenne WY
247 PM MDT Tue Oct 25 2016

.SHORT TERM...(This evening through Thursday)
Issued at 247 PM MDT Tue Oct 25 2016

Radar depicting just a few light sprinkles over parts of the CWA
early this afternoon in association with a weak shortwave passing
across the area. Back edge of mid/high cloud deck continuing to
slide east across the CWA and should move east of the Panhandle
early this evening leaving mainly clear skies for the night.

Upper ridging builds back over the region Weds through Thursday
and will return dry and unseasonably warm weather to the CWA.
Quite warm on Thursday with some record or near record highs
looking likely with max temps in the 70s to lower 80s over lower
elevations. There will be some breezy conditions mainly around the
southeast Wy mtns both afternoons in response to lee troffing over
the high plains increasing the pressure gradient.

.LONG TERM...(Thursday night through Tuesday)
Issued at 247 PM MDT Tue Oct 25 2016

Winds will pick up again Friday and periodically through the
course of the weekend as a lee side trough deepens increasing the
pressure gradient ahead of an approaching shortwave coming east
out of the desert southwest. We could see gusts 40 to 60 mph for
elevations above 5500 ft msl potentially impacting travel across
the I-80 and I-25 corridors at times. Something we will have to
watch for going towards the weekend. Otherwise...advertising small
pops for rain and brief snow (higher elevations) Friday night
ahead of that shortwave, then again with slightly higher PoPs out
west across parts of Carbon county for Sunday night ahead of
another shortwave ejecting out of a rather persistent west coast


.AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon)
Issued at 1119 AM MDT Tue Oct 25 2016

Breezy west winds 20 to 30 knots today across southeast Wyoming
with lighter but still increasing winds this afternoon from the
west and northwest across the western Nebraska Panhandle. Minor
upper disturbance tracking slowly east across eastern Wyoming
producing a mid-deck ceiling around 10,000 ft msl for Laramie,
Cheyenne, Scottsbluff, Chadron, Alliance and Sidney with a few
sprinkles possible but most precipitation falling out of that mid-
deck likely not reaching the ground. Upper level winds start to
pick up quite a bit tonight as a 90 knot 250 mb jetmax moves
across southeastern Wyoming. With sufficiently dry mid to low
level airmass about all that we expect from that upper jetmax to
generate are some standing wave clouds at or above 20,000 ft msl
on the west side of the mountains with no impacts to ground,
takeoff or landing operations at our area airports tonight into
tomorrow. VFR category expected over the next 24 hours.


Issued at 247 PM MDT Tue Oct 25 2016

See no real concerns for fire weather for the rest of the week.
Conditions may approach critical conditions for a short time
just east of the mtns Thursday afternoon otherwise min rhs
expected to stay sufficiently above critical levels. Some gusty
winds in the afternoon over western districts.




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