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Avalanche: Hatcher Pass

Location: Hatch Peak

Date:
Observer:
Route & General Observations

Skied some north facing aspects with dry snow.

Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger SnowmachinerAvalanche Type Soft Slab
Aspect NorthwestElevationunknown
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Rununknown
Avalanche Details

Us 4 skiers didn't trigger or observe anything from where we were on Hatch Peak.

Upon return to the car, there was a party of snowmobilers who were waiting for friends to get dig out a backpack which was buried in an avy. They said the slope had been rode about 8 times already. They switched to riding an adjacent slope, and a combination of the rider snowmachining and a cornice falling triggered a large slide on the old slope. The slide ran far, into the area where they were hanging out and watching from. In sledding away from the incoming slide, a backpack they left was buried. Around Hidden Bowl apparently.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Snowmachine triggered avalanche

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Below freezing, on/off light to moderate winds, mostly cloudy.

Snow surface

Heavy frozen mush at the car, drying with elevation.