Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 140513
AFDCYS

Area Forecast Discussion
National Weather Service Cheyenne WY
1013 PM MST Sat Jan 13 2018

.UPDATE...
Issued at 839 PM MST Sat Jan 13 2018

Getting snow reported at Kimball and Sidney at this time and we
did have some flurries here at Cheyenne, so went ahead and added
some PoPs into the forecast for the southern Panhandle and Laramie
County this evening. Latest IR imagery showing some cooling cloud
tops out across the southern Panhandle and radar is showing an
area over that same area. Thought it was time to add some snow in
the forecast through early morning. Updates sent.

&&

.SHORT TERM...(This evening through Monday)
Issued at 235 PM MST Sat Jan 13 2018

Shortwave dropping southeast across the Dakotas clipping the CWA
with a little snow/flurries noted from northeast Niobrara into
the far northern Neb Panhandle this afternoon. This should end
this evening as the wave continues southeast and out of the area.
A mild day across the CWA Sunday then the arctic front drops south
over much of the CWA Sunday night as a shortwave rotates around
an upper low over the western Great Lakes area. Should see an area
of mainly light snow behind the front Sunday night over the
northeast part of the CWa then over southeast Wy and the southern
Panhandle Monday, tapering off in the afternoon. Accumulations
over the plains look to be around and inch or so with abut 2 to 4
inches over the mtns. Much colder Monday as the cold surface high
builds into the northern plains with highs only in the teens to
lower 20s east of the mtns.

.LONG TERM...(Monday night through Saturday)
Issued at 235 PM MST Sat Jan 13 2018

Clearing Monday night allowing for very cold temperatures. Mins in
the -5 to -15F range expected over the Panhandle into east-central
Wy with very low winds chills possible. Milder temperatures should
begin their return Tuesday as the cold surface high moves
southeast and return flow ensues over the CWA. Mainly dry and
Mild Weds through Friday as upper ridging becomes predominant over
the region. By late Friday the next upper trough moves into the
region with cooler conditions and sctd snow showers late Friday
into Saturday.

&&

.AVIATION...(For the 06Z TAFS through 06Z Sunday night)
Issued at 1008 PM MST Sat Jan 13 2018

For most part, VFR conditions expected. We are seeing MVFR
conditions for our eastern nebraska Panhandle airports...mainly
KCDR this evening. Latest HRRR shows these ceilings lifting though
over the next couple hours. We have another arctic boundary moving
into the area from the north Sunday evening that will bring
widespread light snow and IFR conditions to the Panhandle and
airports east of the Laramie Range. Started trending these TAFs
down towards 00Z Sunday.

&&

.FIRE WEATHER...
Issued at 235 PM MST Sat Jan 13 2018

No fire weather concerns expected into next week with weather
factors non-critical. Mild Sunday then an arctic cold front will
move across most of the area Sunday night with some light snow
into Monday.  Slow warmup then expected through mid-week.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...None.
NE...None.
&&

$$

UPDATE...GCC
SHORT TERM...RE
LONG TERM...RE
AVIATION...GCC
FIRE WEATHER...RE



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