Much colder air aloft following the passage of a cold front produced the season's first snow event across much of southeast Wyoming. Snow accumulations were variable due to initial melting, with amounts from two to five inches.
Every event with a place to put it; 2 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.
Much colder air aloft following the passage of a cold front produced the season's first snow event across much of southeast Wyoming. Snow accumulations were variable due to initial melting, with amounts from two to five inches. Interstate 80 and US Highway 30 were periodically closed between Laramie and Cheyenne during the early morning. There was one traffic accident due to winter weather conditions which occurred around 2:30 AM local time. US Highway 287 from Laramie to the Colorado border was also closed.
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 Nov 4, 2:49 PM MST, 3 hours 11 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
2 winter weather. Local standard time, as filed.
An observer four miles southeast of Buford measured 5.5 inches of snow.
An observer 17 miles west-northwest of Cheyenne reported 3.7 inches of snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2015Every state in 2015This day in weather historyWarnings in Wyoming, November 2015
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: 607208, 601337.