Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 251157

Area Forecast Discussion
National Weather Service Cheyenne WY
557 AM MDT Fri May 25 2018

.SHORT TERM...(Today through Sunday)
Issued at 253 AM MDT Fri May 25 2018

An upper ridge will build over the area today then move slowly
east over the plains on Saturday while at the same time an upper
low moves into the southwestern part of the country. The building
ridge will allow for a warm and dry day across the CWA today under
mainly clear skies with max temps in the 80s common. Clear and
mild tonight then quite warm Saturday with max temps about 5
degrees warmer. Subtle changes begin late Saturday as a weak
impulse lifts northward ahead of the upper low and sets off
isolated showers and tstms mainly over northern parts of the CWA
late Saturday. A greater coverage of convection is expected Sunday
as the upper low drifts closer and a push of cooler air sinks down
the high plains. Could be a few stronger storms over the plains
Sunday with decent instability but shear not looking too great.

.LONG TERM...(Sunday night through Thursday)
Issued at 253 AM MDT Fri May 25 2018

Forecast guidance continues in good agreement with a slow moving
low moving through the area Monday and Tuesday. Monday still looks
pretty wet with likely rain showers and thunderstorms. Probably
need to start messaging a wet forecast for Memorial Day outdoor

Unsettled weather to continue with afternoon showers/thunderstorms
Tuesday as upper low slowly moves through. Upper low finally moves
east Tuesday night/Wednesday morning with warmer temperatures and
drier conditions returning.


.AVIATION...(For the 12Z TAFS through 12Z Saturday morning)
Issued at 556 AM MDT Fri May 25 2018

VFR conditions expected next 24 hours as high pressure builds
over eastern Wyoming. Dry westerly winds expected. Turning
northeast across the Nebraska Panhandle this evening. No weather
impacts to aviation expected.


Issued at 253 AM MDT Fri May 25 2018

High pressure building over the region will produce very warm and
mainly dry weather over the districts today and Saturday. Fire
weather concerns should be low given green fuels but lowest
afternoon humidities will be low over western districts today and
saturday, below 15 percent. Cooler temperatures will return Sunday
into early next week with increasing chances for showers and




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