Snow develop during the early morning hours of December 3rd and spread southeast during the early morning hours. This produced slippery and hazardous road conditions through out the area, including I-25, I-76, and I-70.
Every event with a place to put it; 7 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 BOU wrote it up.
Snow develop during the early morning hours of December 3rd and spread southeast during the early morning hours. This produced slippery and hazardous road conditions through out the area, including I-25, I-76, and I-70. From the Denver Post...through 6:45 PM Wednesday, 939 flights at DIA were delayed and 11 were canceled, according to flight-tracking website FlightAware. Several school districts delayed opening due to treacherous travel conditions.
The national radar mosaic for the moment the first event began.
7 winter weather. Local standard time, as filed.
CoCoRaHS and spotter reports indicated 3 to 8 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel.
CoCoRaHS and spotter reports indicated 4 to 7 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel.
CoCoRaHS and spotter reports indicated 7 to 12 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel.
CoCoRaHS and spotter reports indicated 5 to 9 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel.
CoCoRaHS and spotter reports indicated 4 to 7 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel through out the Denver area.
CoCoRaHS and spotter reports indicated 5 to 8 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel, including I-25 south of Denver.
CoCoRaHS and spotter reports indicated 5 to 10 inches fell across the area. This caused road to become snow covered, which led to slow and hazardous travel.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2025Every state in 2025This day in weather historyWarnings in Colorado, December 2025
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 2026-09-24. Each event’s entry at NCEI: 1296378, 1296381, 1296379, 1296382, 1296383, 1296384, 1296380.