National Weather Service Weather Forecast Office

Forecasters at the National Weather Service in Riverton, Wyoming have determined a winter storm will affect western Wyoming this afternoon and tonight.

Snow, heavy at times...is expected to develop over far northwest Wyoming this afternoon including Yellowstone and the Teton and Gros Ventre mountains.  The snow is expected to expand southward across western Wyoming late this afternoon into the evening. The rain and/or snow in the western valleys will change to all snow by around sunset.  Snow amounts through Wednesday morning are expected range from 12 to 18 inches over southwest Yellowstone National Park and Teton mountains.  Two to four inches of snow with isolated higher amounts are expected across Jackson Hole, Star Valley and southern Lincoln County with 5 to 10 inches over the Salt River, Wyoming and Western slopes of the Wind River mountains.  One to three inches is expected over the Upper Green River Basin with the highest amounts near Pinedale and Bondurant.  The snow is expected to taper of Wednesday morning.  In addition strong winds will create blowing and drifting of snow with limited visibility. 

Very strong winds are expected over the eastern slopes of the Absaroka and Wind River mountains this afternoon and early evening where westerly winds between 40 and 55 mph are expected to develop.  Gusts around hurricane force can be expected.  Strong winds are also expected over southeast Fremont County and much of Natrona County this afternoon into early evening.

Please refer to the latest winter weather and high wind statements for the latest information on this ongoing winter storm.

A map of current road conditions for roadways across Wyoming can be seen at the Wyoming Department of Transportation’s website. You can also dial 5-1-1 from any Wyoming-based telephone to receive current road closures.

Some reminders about winter weather preparedness:

• Stay indoors if possible.
• If you must go outside, dress appropriately:
  • Multiple layers of loose fitting clothing to promote insulation.
  • Heavy woven materials are ideal.
  • Wear a hat – 50% of your body heat escapes through you head.
  • Wear a scarf or something to cover your mouth and nose.
  • Cover as much of your skin as possible.
  • Mittens are better than gloves.
• Remember, rarely is a trip a “MUST” trip.  Plan accordingly to avoid hazardous winter travel.
• If travelling is absolutely unavoidable, please prepare a winter safety kit for your car. Details regarding what should be included in this kit can be found in this document.  Never leave your vehicle when stranded. It is your only sure source of protection from the elements.
• Additional information about travelling in the winter across Wyoming can be found on our Winter Preparedness website.