Avalanche: Turnagain

Location: Lipps

Route & General Observations

Lipps to 3300′.

Avalanche Details
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Trigger NaturalRemote Trigger No
Avalanche Type GlideAspect Southwest
ElevationunknownSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Rununknown  
Avalanche Details

Large glide avalanche on SW shoulder of Cornbiscuit, happened sometime between 11:30am and 2:30pm. It looked to have entrained a shallow slab along its way down. There is also a glide crack further down along the slope and to viewer's right. See attached photo.

Some debris piles scattered around the mountains, looking to have ran mid storm. Most notable was a slab avalanche crown on the north face of Petes south, around 500 feet wide and 1-2 feet deep (rough estimates, hard to tell from so far away).

Red Flags
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Observer Comments

None observed

Weather & Snow Characteristics
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Partly cloudy. Hardly any wind. Valley fog hung around throughout the day around 1000'.

Snow surface

Areas of light wind affect. 2-4mm surface hoar from 1400' up to ridgetops.


We dug a pit at 2200' on a SW aspect. Snow height at pit location was 165cm.
Our compression tests failed with moderate force 30cm down and hard force at 52cm down, both at density changes (CT18PC @30cm , CT23RP @52cm). Our extended column tests failed with similar forces at the same layers, but the breaks did not propagate (ECTN11 @ 30cm, ECTN22 @52cm).
We looked hard for any buried surface hoar in our pit, but we could only identify stellar and decomposing particles in our fracture planes.

Photos & Video
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