Colorado, 2017

Winter Weather in Colorado, April 28 to 29, 2017

April 28 to 29, 2017 · NWS GJT · 5 events in 5 counties and zones

An upper level low pressure system centered over the San Juan Mountains advected plenty of moisture northwards which resulted in many mountain locations having received significant late season snowfall.

Where it happened

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.

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

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The toll

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.

What happened

The episode as NWS GJT wrote it up.

An upper level low pressure system centered over the San Juan Mountains advected plenty of moisture northwards which resulted in many mountain locations having received significant late season snowfall.

The radar

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

Open the radar archive at this moment

Event by event

5 winter weather. Local standard time, as filed.

Winter Weather, Southwestern San Juan Mountains

When
April 28, 4:00 PM MST to April 29, 12:00 PM MST
Where
Southwestern San Juan Mountains forecast zone
Reported by
Department of Highways
Coordinates
37.594, -107.912 (the zone’s center; the record gives no point)

Generally 3 to 6 inches of snow fell across the area with up to 7 inches measured at the Red Mountain Pass SNOTEL site.

Winter Weather, Northwestern San Juan Mountains

When
April 28, 5:00 PM MST to April 29, 6:00 AM MST
Where
Northwestern San Juan Mountains forecast zone
Reported by
Trained Spotter
Coordinates
38.210, -107.755 (the zone’s center; the record gives no point)

Snowfall amounts of 3 to 6 inches were measured across the area with up to 9 inches reported by a spotter 7 miles northeast of Sawpit.

Winter Weather, Gore and Elk Mountains/Central Mountain Valleys

When
April 28, 8:00 PM MST to April 29, 1:00 PM MST
Where
Gore and Elk Mountains/Central Mountain Valleys forecast zone
Reported by
SNOTEL
Coordinates
39.481, -107.172 (the zone’s center; the record gives no point)

Snowfall amounts of 3 to 5 inches were measured across the area which resulted in many roads that became snowpacked overnight.

Winter Weather, West Elk and Sawatch Mountains

When
April 28, 9:00 PM MST to April 29, 4:00 AM MST
Where
West Elk and Sawatch Mountains forecast zone
Reported by
SNOTEL
Coordinates
38.643, -107.721 (the zone’s center; the record gives no point)

Up to 8 inches of snow fell at the Porphyry Creek SNOTEL site, with lesser amounts elsewhere within the zone. Strong winds accompanied snow showers with a peak wind gust of 52 mph measured at Monarch Pass which led to periods of blowing snow.

Winter Weather, Grand and Battlement Mesas

When
April 28, 11:00 PM MST to April 29, 4:00 AM MST
Where
Grand and Battlement Mesas forecast zone
Reported by
SNOTEL
Coordinates
39.159, -108.078 (the zone’s center; the record gives no point)

Snowfall amounts of 2 to 4 inches were measured across the area with caused many roads to become snowpacked overnight.

What these are

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.

The same day elsewhere

More

Every storm in Colorado in 2017Every state in 2017This day in weather historyWarnings in Colorado, April 2017

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: 691262, 691260, 691261, 691258, 691259.