The National Weather Service in Cheyenne has upgraded a Winter Storm Watch to a Winter Storm Warning for higher elevations across southeastern Wyoming.

URGENT - WINTER WEATHER MESSAGE
National Weather Service Cheyenne WY
1205 PM MST Thu Nov 15 2018

...WINTER STORM HEADLINES IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SATURDAY EVENING...

.Snow will develop across the region Friday afternoon and
increase in coverage and intensity through the overnight and much
of Saturday. Periods of moderate to heavy snowfall likely with
snow expected to taper off Saturday evening.

WYZ103>106-110-114-116-117-161200-
/O.UPG.KCYS.WS.A.0014.181117T0000Z-181118T0300Z/
/O.NEW.KCYS.WS.W.0019.181117T0000Z-181118T0300Z/
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-Central Laramie Range and Southwest Platte County-
North Snowy Range Foothills-Snowy Range-South Laramie Range-
South Laramie Range Foothills-
Including the cities of Garrett, Seminoe Dam, Medicine Bow,
Shirley Basin, Bordeaux, Arlington, Elk Mountain, Centennial,
Albany, Buford, Pumpkin Vine, Vedauwoo, Whitaker, Federal,
and Horse Creek
1205 PM MST Thu Nov 15 2018

...WINTER STORM WARNING IN EFFECT FROM 5 PM FRIDAY TO 8 PM MST
SATURDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 8
  inches below 7000 feet and over the Interstate 80 Summit with
  10 to 14 over the North Laramie and Snowy Ranges.

* WHERE...Higher elevations across southeastern Wyoming including
  the Snowy and Laramie Ranges, including the foothills west of
  Cheyenne and the Interstate 80 Summit.

* WHEN...From 5 PM Friday to 8 PM MST Saturday.

* ADDITIONAL DETAILS...Travel could be very difficult. Patchy
  blowing snow could significantly reduce visibility. The
  hazardous conditions could impact the evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.