A Pacific cold front moved across the region December 27th and brought Periods of moderate to heavy snow to the mountains, with some light snow and gusty winds for the valleys.
Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CYS wrote it up.
A Pacific cold front moved across the region December 27th and brought Periods of moderate to heavy snow to the mountains, with some light snow and gusty winds for the valleys.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Cheyenne, WY wrote its last area forecast discussion before the first event at Dec 26, 10:30 PM MST, 1 hour 30 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 heavy snow, 2 winter weather. Local standard time, as filed.
SNOTEL observation sites across the Sierra Madre Range reported total snow accumulations between 18 to 27 inches. Highest accumulation was at Old Battle SNOTEL which reported 26.7 inches.
A few SNOTEL sites in the Snowy Range showed 20 to 26 inches of snow December 27th and December 28th. Highest snowfall of 25.5 inches was reported at Medicine Bow Peak.
Several reports near Elk Mountain Wyoming of 4 to 6 inches of snow. Two day total. Gusty winds up to 60 MPH were also reported, where blowing and drifting snow was observed on area webcams.
One report of 2.1 inches south of Saratoga, near Encampment Wyoming.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2025Every state in 2025This day in weather historyWarnings in Wyoming, December 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1300402, 1300403, 1300405, 1300404.