Moist air overran a cold surface airmass and produced heavy snowfall amounts over parts of southeast Wyoming over a 2-3 day period.
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.
Moist air overran a cold surface airmass and produced heavy snowfall amounts over parts of southeast Wyoming over a 2-3 day period.
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 Jan 24, 1:48 PM MST, 12 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
5 winter weather, 4 winter storm. Local standard time, as filed.
An estimated 12 to 20 inches of snow fell during the period with over 2 feet estimated to have fallen at the Snowy Range Ski Resort near Centennial, WY.
Total snowfall from 7 to 10 inches was reported in an around Cheyenne, WY.
Total snowfall during the period estimated to be from 8 to 10 inches at Douglas and Bill, WY.
Total snowfall during the period estimated to be from 9 to 12 inches at Lusk, WY.
Total snowfall during the period estimated to be around 8 inches at Pine Bluffs, WY.
Total snowfall during the period was estimated to be from 6 to 8 inches over the area.
An estimated 10 to 16 inches of snow fell during the period.
An estimated 12 inches of snow fell during the period.
An estimated 12 inches of snow fell in Chugwater, WY. during the period with about 9 inches of snow in Wheatland, WY.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2009Every state in 2009This day in weather historyWarnings in Wyoming, January 2009
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: 144912, 144913, 144914, 144915, 144916, 144917, 144909, 144910, 144911.