Colorado, 2010

Winter Storm and Avalanche in Colorado, November 15 to 16, 2010

November 15 to 16, 2010 · NWS BOU · 6 events in 4 counties and zones

A winter storm brought heavy snow to the North Central Mountains of Colorado. 5 inches at Grizzly Peak and Stillwater Creek; and 10 inches near Grand Lake.

Where it happened

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.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
1
Property damage
None recorded
Crop damage
None recorded
Events
6

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.

What happened

The episode as NWS BOU wrote it up.

A winter storm brought heavy snow to the North Central Mountains of Colorado. Storm totals included: 19.5 inches at Columbine SNOTEL, 16.5 inches at Never Summer, 15 inches at Joe Wright, 13.5 inches at Jones Pass and Phantom Valley SNOTEL, 12 inches at the Loveland, Tower and Zirkel SNOTEL sites; 10.5 inches at Grizzly Peak and Stillwater Creek; and 10 inches near Grand Lake. Lesser amounts of 4 to 9 inches were observed elsewhere. In addition, a snowboarder was injured in an avalanche over Berthoud Pass.

What forecasters said that day

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 Denver/Boulder, CO wrote its last area forecast discussion before the first event at Nov 14, 5:35 PM MST, 6 hours 25 minutes earlier.

Area forecast discussion, Nov 14, 5:35 PM MST, 6 hours 25 minutes before
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Hazardous weather outlook, Nov 14, 10:55 AM MST, 13 hours 5 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DENVER CO
1055 AM MST SUN NOV 14 2010

COZ030>051-151300-
JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND
COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000
FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/
NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST
GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/
SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND
BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST
DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK
COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER
COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON
COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS
COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/
EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES
ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD
COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-
NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN
COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN
COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS
COUNTY-
1055 AM MST SUN NOV 14 2010

...WINTER WEATHER ADVISORY FOR THE NORTHERN MOUNTAINS MIDNIGHT
TONIGHT UNTIL MIDNIGHT MONDAY NIGHT...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL
COLORADO.

.DAY ONE...TODAY AND TONIGHT

OCCASIONAL LIGHT SNOW SHOWERS WILL CONTINUE ACROSS THE MOUNTAINS
THROUGH THIS EVENING...WITH ADDITIONAL SNOW ACCUMULATIONS UP TO 2
INCHES. THE MOUNTAIN SNOWFALL IS EXPECTED TO INCREASE IN INTENSITY
BY MIDNIGHT TONIGHT. THE SNOWFALL...ALONG WITH GUSTY WINDS ABOVE
TIMBERLINE...WILL PRODUCE HAZARDOUS TRAVEL IN THE HIGH COUNTRY WITH
SNOWPACKED ROADS...AREAS OF BLOWING SNOW...AND REDUCED VISIBILITIES.
ACROSS THE PLAINS...DRY CONDITIONS WILL PREVAIL.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WITH STRONG MOIST NORTHWESTERLY FLOW ALOFT...THE MOUNTAINS CAN
EXPECTED SNOW LIKELY MONDAY INTO WEDNESDAY MORNING.  A MAJOR
SNOWFALL IS NOT EXPECTED...BUT SEVERAL INCHES ARE POSSIBLE ON THE
NORTHWEST FACING SLOPES THROUGH THAT PERIOD.  THE EASTERN PLAINS CAN
EXPECT A SLIGHT CHANCE OF SNOW SHOWERS WITH DRY CONDITIONS NEAR FOR
THE URBAN CORRIDOR THROUGH EARLY WEDNESDAY.  WINDY CONDITIONS ARE
ALSO EXPECTED ON THE PLAINS INTO WEDNESDAY.  FROM WEDNESDAY
AFTERNOON THROUGH SATURDAY...DRY CONDITIONS ARE EXPECTED OVER ALL
THE FORECAST AREA...WITH WARMING TEMPERATURES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT...BUT ANY
REPORTS OF MOUNTAIN SNOWFALL WOULD BE APPRECIATED.

D_L/RJK

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

4 winter weather, 1 winter storm, 1 avalanche. Local standard time, as filed.

Winter Weather, West Jackson & West Grand Counties Above 9000 Feet

When
November 15, 12:00 AM MST to 2:27 AM MST
Where
West Jackson & West Grand Counties Above 9000 Feet forecast zone
Reported by
SNOTEL
Coordinates
40.385, -106.230 (the zone’s center; the record gives no point)

Winter Weather, Grand & Summit Counties Below 9000 Feet

When
November 15, 12:00 AM MST to November 16, 12:00 AM MST
Where
Grand & Summit Counties Below 9000 Feet forecast zone
Reported by
Mesonet
Coordinates
39.869, -106.117 (the zone’s center; the record gives no point)

Winter Weather, S & E Jackson / Larimer / N & Ne Grand / Nw Boulder Counties Above 9000 Feet

When
November 15, 12:00 AM MST to November 16, 12:00 AM MST
Where
S & E Jackson / Larimer / N & Ne Grand / Nw Boulder Counties Above 9000 Feet forecast zone
Reported by
SNOTEL
Coordinates
40.382, -105.820 (the zone’s center; the record gives no point)

Winter Weather, S & Se Grand / W Central & Sw Boulder / Gilpin / Clear Creek / Summit / N & W Park Counties Above 9000 Feet

When
November 15, 12:00 AM MST to November 16, 12:00 AM MST
Where
S & Se Grand / W Central & Sw Boulder / Gilpin / Clear Creek / Summit / N & W Park Counties Above 9000 Feet forecast zone
Reported by
SNOTEL
Coordinates
39.726, -105.675 (the zone’s center; the record gives no point)

Winter Storm, West Jackson & West Grand Counties Above 9000 Feet

When
November 15, 2:28 AM MST to November 16, 12:00 AM MST
Where
West Jackson & West Grand Counties Above 9000 Feet forecast zone
Reported by
SNOTEL
Coordinates
40.385, -106.230 (the zone’s center; the record gives no point)

Avalanche, S & Se Grand / W Central & Sw Boulder / Gilpin / Clear Creek / Summit / N & W Park Counties Above 9000 Feet

When
November 16, 9:15 AM MST
Where
S & Se Grand / W Central & Sw Boulder / Gilpin / Clear Creek / Summit / N & W Park Counties Above 9000 Feet forecast zone
Injuries
1 direct, 0 indirect
Reported by
State Official
Coordinates
39.726, -105.675 (the zone’s center; the record gives no point)

A snowboarder was injured when he triggered an avalanche at the Nitro Chute on Berthoud Pass. He suffered a back injury when he was transported over a cliff band. The severity of his injuries was unknown.

What these are

Winter Weather
Snow, sleet or freezing rain below warning levels that still caused disruption, damage or casualties.
Winter Storm
A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
Avalanche
A mass of snow sliding down a mountainside that caused a death, an injury or damage.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Colorado in 2010Every state in 2010This day in weather historyWarnings in Colorado, November 2010

Sources

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: 267183, 267184, 267185, 267186, 267661, 268191.