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Crested Butte Avalanche Center

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March 20, 2023

Sluffy storm snow

Date of Observation: 03/20/2023
Name: Zach Guy

Zone: Southeast Mountains
Route Description: Rec tour, several northeast facing slopes BTL

Observed avalanche activity: Yes
Avalanches: Skier triggered a loose dry avalanche that was large enough to push someone into a tree or terrain trap, entraining about 10″ of loose snow.
Weather: Snowfall rates alternated between light and moderate. Calm winds BTL.
Snowpack: About 6″ of pleasantly fluffy new snow by 4 p.m., on top of a low density, faceted interface. The upper 10″ or so sluffed easily on slopes steeper than about 38 degrees. No slab formation yet in the new snow, but once it does, there is a decent amount of snow for entrainment.

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Estimated avalanche date: 03/20/2023
Number of Avalanches: 1

Location

Location:
Location Specific:
Start Zone Elevation: BTL: Below Tree Line
Aspect: NE

Characteristics

Trigger: Skier
Trigger modifier: Controlled
Type: Loose
Failure Plane: Old snow

Size

Relative Size: R1 very small
Destructive Size: D1- Relatively harmless to people
Avg. crown height (inches): 10
Avg. width (feet):
Avg. vertical run (feet):

Involvements

# of people caught:
# of partial burials:
# of full burials:

Additional comments: Sluff involving old snow from last week’s storm

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