A moist northwest flow aloft produced significant snowfall in many mountain areas of western Colorado.
Every event with a place to put it; 6 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 GJT wrote it up.
A moist northwest flow aloft produced significant snowfall in many mountain areas of western Colorado.
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 Grand Junction, CO wrote its last area forecast discussion before the first event at Dec 10, 3:13 AM MST, 47 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
3 winter weather, 3 winter storm. Local standard time, as filed.
Snowfall accumulations of 5-10 inches was measured across the area.
Snowfall accumulations of 8 to 14 inches were measured across the zone. Wind gusts of 30 to 65 mph produced widespread blowing and drifting snow, along with local blizzard conditions.
Snowfall accumulations of 10-13 inches was measured across most of the area. Wind gusts of 20 to 40 mph produced areas of blowing and drifting snow.
Snowfall accumulations of 4-8 inches was measured across the area. Wind gusts of 20 to 30 mph produced local areas of blowing and drifting snow.
Snowfall accumulations of 8 to 13 inches were measured across the zone. Wind gusts of 30 to 45 mph produced areas of blowing and drifting snow.
Snowfall accumulations of 4-8 inches was measured across the area. Wind gusts of 30 to 60 mph produced areas of blowing and drifting snow, along with localized blizzard conditions.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2010Every state in 2010This day in weather historyWarnings in Colorado, December 2010
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 2026-09-30. Each event’s entry at NCEI: 270769, 270764, 270766, 270770, 270765, 270771.