National Weather Service United States Department of Commerce

Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

  Overview

Periods of heavy snowfall occurred across Yellowstone
National Park, and the Absaroka Mountains from Thursday
night through Saturday morning. At the same time very
strong mountain top winds were observed as well as between
Rock Springs to Casper. An Arctic cold front pushed south,
east of the Divide Friday with bitter cold temperatures in
the single digits above and below zero. South of this Arctic
front unseasonably warm temperatures were observed Friday with
Rock Springs tying a record high of 47 degrees. Another surge
of Arctic air on Saturday combining with a disturbance aloft 
produced a line of moderate to heavy snow east of the Divide
with most areas seeing 1 to 3 inches of new snowfall. 

 

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Snowfall Totals for December 29th and 30th
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Cody Snow Picture (courtesy of Jeremy J.)  Heavy snow in Casper Saturday Evening Contrast of temperatures at 3 PM Friday
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