Area Forecast Discussion
Issued by NWS Cheyenne, WY

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
FXUS65 KCYS 132335

Area Forecast Discussion
National Weather Service Cheyenne WY
535 PM MDT Fri Apr 13 2018

.SHORT TERM...(This evening through Sunday)
Issued at 245 PM MDT Fri Apr 13 2018

Heaviest snow has stayed more over the southeast part of the NE
Panhandle so far where several reports over 4 inches has been received.
Some problems due to the wet/sticky nature of snow and strong winds.
Snow will persist into this evening as the upper low currently
over northwest Kansas drifts east slowly and pulls the pcpn shield
slowly eastward as well. Gusty winds will also ease slowly this
evening as a surface ridge builds down the high plains and reduces
the pressure gradient. Made small changes to current hilites
given trends otherwise things should be pretty much wound down by
late this evening.

Much quieter weather expected for the weekend as upper ridging sets
up over the area. Temperatures still cool, especially east of the
mtns saturday as the cool surface high holds over the northern and
central Plains. Milder conditions on Sunday with some increase in
high cloudiness topping the upper ridge.

.LONG TERM...(Sunday night through Friday)
Issued at 245 PM MDT Fri Apr 13 2018

Medium range models/ensembles in decent agreement with a large scale
ridge dominating the CWA early in the week. It will be breezy, with
windy conditions across Carbon County Monday due to a tightening low
level pressure gradient. Low humidities and warm temperatures will
elevate the fire danger along the lee of the Laramie Range Monday
afternoon. A progressive upper low pressure trough and cold front
will advance east through the CWA Tuesday, accompanied by gusty west
to northwest winds and scattered rain/snow showers. High temperatures
Tuesday will be 10-20 degrees colder. Snow levels drop from 8500 to
5000 feet by Tuesday evening. Upwards of a tenth of an inch liquid
equivalent precipitation is expected. Cooler than normal temperatures
will continue Wednesday with breezy west to northwest winds.
Southeasterly winds will increase Thursday along and east of the
Laramie Range, with milder temperatures. Need to keep our eyes on
the next Pacific upper low as it tracks east into the Desert Southwest
late Thursday, and northeast in Colorado Friday. Could be dealing
with more winter weather headlines for parts of our CWA.


.AVIATION...(For the 00Z TAFS through 00Z Saturday afternoon)
Issued at 535 PM MDT Fri Apr 13 2018

IFR-LIFR CIG/VIS in snow/blowing snow will linger through this evening
at KSNY, KAIA and KCDR. MVFR-IFR CIG/VIS in light snow through 03Z at
KLAR and 06Z at KCYS. Gusty N-NW winds of 25-45 kt will diminish this
evening and overnight tonight. Snowfall ends after 06Z, with MVFR CIGS
through Saturday morning east of the Laramie Range.


Issued at 245 PM MDT Fri Apr 13 2018

See no concerns into early next week with weather factors expected
to remain non-critical due to cooler temperatures and less wind.
Milder and windier conditions return towards Tuesday.


WY...Winter Storm Warning until midnight MDT tonight for WYZ102.

     Winter Weather Advisory until midnight MDT tonight for WYZ107-

     High Wind Warning until midnight MDT tonight for WYZ117>119.

NE...Winter Storm Warning until midnight MDT tonight for NEZ002-003-



RE WEATHER...RE is the U.S. government's official web portal to all federal, state and local government web resources and services.