Another Pacific Storm to Impact Western Wyoming

The National Weather Service
Building a Weather-Ready Nation

Summary | Forecast | Monitoring & Reporting Snowfall | Safety

Another significant pacific storm system is expected to impact much of western Wyoming through the day on the 29th of February. Snowfall is expected to begin to impact the western mountains early Wednesday morning, as daybreak begins on the leap year day. Snowfall, which may be heavy at times, will then continue through the overnight hours...and begin tapering off early Thursday morning. The area which is expected to see the most impact from this upcoming event is the Teton and Gros Ventre mountain ranges, along with the Jackson Hole and Star Valley areas.  Other portions of the west will also see moderately significant snow, though are expected to see less than those areas in the highest impact. The Teton and Gros Ventre mountains are expected to see widespread snowfall tallies of 12 to 15 inches by Thursday morning, with local amounts up to 18 inches possible. The Jackson Hole and Stary Valley areas can expect to see 5 to 8 inches across the valley, though amounts of up to 10 inches will be possible across the northern portion of each valley.

Other areas, including Yellowstone, the Wind River Mountains, the Absaroka Mountains, the Upper Green River Basin Foothills, the Wyoming and Salt Ranges, and southern Lincoln county are expected to see lesser, though not unimpressive, snow amounts. Amounts of 6 to 10 inches are anticipated over the mountains, with local amounts of 12 inches possible over the higher peaks, and especially across the southwestern section of Yellowstone National Park. The lower elevations, including the Upper Green River Basin Foothills, and southern Lincoln county can expect to see 3 to 6 inches of snowfall by Thursday morning.

In additional to snowfall, increased southerly to southwesterly wind will impact western Wyoming. This increased wind will combine with ongoing snowfall...resulting in severely limited visibilities in open areas and over mountain passes. Expect treacherous traveling conditions across western Wyoming throughout the day on Thursday.  Detailed summaries of location, expected snowfall amounts, and impacts can be seen on our Winter Weather Highlights product. 

As mentioned above, the primary meteorological elements of this upcoming storm are the snowfall and the wind. Graphics of anticipated snowfall between Wednesday morning and Thursday morning are shown below, along with anticipated wind speed during the afternoon hours of Wednesday.

Expected Snowfall Anticipated Wind Speed Anticipated Wind Gusts


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