Colorado, 2024Winter Weather in Colorado, December 9, 2024
December 9, 2024 · NWS BOU · 5 events in 5 counties and zones
A band of snow of developed during the morning hours on December 9th over the Palmer Divide. Even though snowfall was light, pavement and air temperatures were the right combination for snowfall to melt on paved surfaces and then freeze.
Every event with a place to put it; 5 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 5
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.
A band of snow of developed during the morning hours on December 9th over the Palmer Divide. Even though snowfall was light, pavement and air temperatures were the right combination for snowfall to melt on paved surfaces and then freeze. This produced very slippery roads, which resulting car accidents and long traffic delays. A more organized area of snow fell during the late afternoon and evening hours of the 9th. Again the snow melted and then froze to the roadways creating very slippery conditions. Between 5 p.m. Monday and 9 a.m. Tuesday, Denver Police responded to 150 crashes nearly triple the 57 crashes reported during the same timeframe earlier this week when the roads were dry.
Winter Weather, Elbert / C & E Douglas Counties Above 6000 Feet
- When
- December 9, 8:00 AM MST to 11:00 PM MST
- Where
- Elbert / C & E Douglas Counties Above 6000 Feet forecast zone
- Reported by
- Mesonet
- Coordinates
- 39.422, -104.468 (the zone’s center; the record gives no point)
Generally 1 to 4 inches of snow fell across the area. Here are some received reports, Sedalia 6.8 S 3.5 inches, Castle Rock 8.6 SSE 3.2 inches, and Castle Pines 2.8 ENE 1.8 inches. I-25 became congested with traffic due to accidents and slow travel during the morning and afternoon peak traffic times.
Winter Weather, Jefferson & W Douglas Counties Above 6000 Feet / Gilpin / Clear Creek / Ne Park Counties Below 9000 Feet
- When
- December 9, 12:00 PM MST to 9:30 PM MST
- Where
- Jefferson & W Douglas Counties Above 6000 Feet / Gilpin / Clear Creek / Ne Park Counties Below 9000 Feet forecast zone
- Reported by
- Mesonet
- Coordinates
- 39.516, -105.413 (the zone’s center; the record gives no point)
There we no reports of increased accidents or traffic issues, though there were likely some given the melting and refreezing of snow on roadways. Snowfall amounts ranged 3 to 7 inches. Here are some of the snowfall reports, 1 SSW Crescent Village 6.0 inches, 1 NNE Evergreen 5.9 inches, 1 SE Kassler 4.5 inches, and 2.6 W Roxborough Park 4.0 inches.
Winter Weather, C & Se Park County
- When
- December 9, 2:00 PM MST to 10:00 PM MST
- Where
- C & Se Park County forecast zone
- Reported by
- Mesonet
- Coordinates
- 39.119, -105.717 (the zone’s center; the record gives no point)
Zero to 5 inches of snow fell across the area. Here are some snowfall reports received, 0.7 E 11-Mile Canyon Reservoir 5.0 inches, 3 NNE Bailey 3.9 inches, 1 NNW Lake George 3.0 inches, 5 N Alma 3.0 inches, and Grant 1 W 2.0 inches.
Winter Weather, Boulder & Jefferson Counties Below 6000 Feet / W Broomfield County
- When
- December 9, 4:30 PM MST to 11:00 PM MST
- Where
- Boulder & Jefferson Counties Below 6000 Feet / W Broomfield County forecast zone
- Reported by
- Mesonet
- Coordinates
- 39.878, -105.220 (the zone’s center; the record gives no point)
Snowfall amounts ranged from zero over the north in Longmont to 4-5 inches south in Golden and Lakewood. Roads became very slippery resulting in slow traffic and accidents. Here are a few snowfall reports, Littleton 6.4 W 5.0 inches, Golden 1.2 NW 4.1 inches, and Arvada 1.4 NNW 1.8 inches.
Winter Weather, N Douglas County Below 6000 Feet / Denver / W Adams & Arapahoe Counties / E Broomfield County
- When
- December 9, 5:00 PM MST to 10:30 PM MST
- Where
- N Douglas County Below 6000 Feet / Denver / W Adams & Arapahoe Counties / E Broomfield County forecast zone
- Reported by
- Broadcast Media
- Coordinates
- 39.714, -104.707 (the zone’s center; the record gives no point)
Even though only an inch or two fell in Denver. Roads became very slippery causing numerous accidents. Between 5 p.m. Monday and 9 a.m. Tuesday, Denver Police responded to 150 crashes nearly triple the 57 crashes reported during the same timeframe earlier this week when the roads were dry. Lakewood police reported 15 crashes in the same period, more than double their usual seven on a non-icy night.
- Winter Weather
- Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- High Wind and Strong Wind in South Dakota, December 9, 202450 kt wind · 14 events
- Dense Fog in New Jersey, December 9 to 10, 202414 events
- Dense Fog in Pennsylvania, December 9 to 10, 202413 events
- Winter Weather in South Dakota, December 9 to 10, 20241 injured · 3 events
- Heavy Snow in Colorado, December 9 to 10, 20249 events
- Flash Flooding in Louisiana, December 9, 20244 events
- Dense Fog in Delaware, December 9 to 10, 20244 events
- Dense Fog in Maryland, December 9 to 10, 20244 events
- Heavy Snow and Winter Weather in South Dakota, December 9 to 11, 20242 events
- Heavy Snow and Winter Weather in Wyoming, December 9 to 11, 20242 events
- High Wind in Alaska, December 9 to 10, 202474 kt wind · 2 events
- Strong Wind in Iowa, December 9, 20242 events
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: 1220040, 1220043, 1220044, 1220042, 1220041.