A moist Pacific trough moved west to east across northwest Colorado and produced significant early season snowfall in the mountains and some valley locations.
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 Pacific trough moved west to east across northwest Colorado and produced significant early season snowfall in the mountains and some valley locations.
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 Nov 4, 4:48 PM MST, 21 hours 12 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
6 winter weather. Local standard time, as filed.
Snowfall amounts of 4 to 12 inches were measured across the zone. Snowpacked roads occurred on Highway 40 over Rabbit Ears Pass, where locally higher snowfall amounts to 14 inches occurred.
Snowfall amounts of 3 to 8 inches were measured across the zone.
Snowfall amounts of 3 to 7 inches were measured across the zone. Locally higher amounts included 10 inches around Clark.
Snowfall amounts of 1 to 2 inches were measured across the zone during rush hour.
Snowfall amounts of 3 to 7 inches were measured mainly in the Eagle County portion of the zone. Interstate 70 was closed during the first half of the morning from Avon to Vail Pass where numerous vehicle accidents occurred.
Snowfall amounts of 1 to 3 inches were measured across the zone during rush hour.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2015Every state in 2015This day in weather historyWarnings in Colorado, November 2015
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: 608475, 608477, 608478, 608479, 608476, 608480.