A shortwave trough dropped into western Colorado from the northern Rockies and produced significant snowfall over the northwest mountains.
Every event with a place to put it; 3 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 shortwave trough dropped into western Colorado from the northern Rockies and produced significant snowfall over the northwest mountains.
The national radar mosaic for the moment the first event began.
3 winter weather. Local standard time, as filed.
Generally 3 to 6 inches of snow fell across the area. Locally higher amounts included 8 inches at Vail Mountain. Roads became slippery along Interstate 70 which resulted in some safety closures.
Generally 4 to 7 inches of snow fell across the area. Locally higher amounts included 14 inches at the Tower SNOTEL site.
Generally 3 to 6 inches of snow fell across the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2018Every state in 2018This day in weather historyWarnings in Colorado, December 2018
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: 790633, 790632, 790634.