Within a very broad upper trough a moist low pressure circulation moved across the region and produced significant snowfall in some areas within western Colorado.
Every event with a place to put it; 8 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.
Within a very broad upper trough a moist low pressure circulation moved across the region and produced significant snowfall in some areas within 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 2, 4:42 AM MST, 18 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
8 winter weather. Local standard time, as filed.
Snowfall amounts of 5 to 8 inches were measured across the area. During the event, temporary road closures occurred on Highway 550 in the Red Mountain Pass area for avalanche mitigation.
Snowfall amounts of 3 to 6 inches were measured across the area. Locally higher amounts included 8 inches at the Yellowjacket cooperative observer station.
Snowfall amounts of 3 to 5 inches were measured across the area. Locally higher amounts included 6 inches in Breen and Redmesa.
Snowfall amounts of 4 to 6 inches were measured across the area, including 5 inches in Ouray. During the event, temporary road closures occurred on Highway 550 in the Red Mountain Pass area for avalanche mitigation.
Snowfall amounts of 3 to 5 inches were measured across the area.
Snowfall amounts of 4 to 6 inches were measured across most of the zone.
Snowfall amounts of 2 to 4 inches were measured across the Grand Valley, with the lower amounts at the east end of the valley. Numerous vehicle accidents occurred during the evening hours of December 2nd.
Snowfall amounts of 2 to 3 inches were measured across the area. This was the first significant snowfall of the season for most of this zone which resulted in many vehicle accidents due to the slick roads.
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: 789151, 789181, 789162, 789166, 789186, 789224, 789103, 789104.