| Trigger | Natural | Remote Trigger | No |
| Avalanche Type | Glide | Aspect | Southwest |
| Elevation | unknown | Slope Angle | unknown |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | unknown |
Avalanche: Turnagain
Location: Lipps
Lipps to 3300′.
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).
Observer Comments
None observed
Weather
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.
Snowpack
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.
Glide avalanche on Cornbiscuit, as seen from Lipps.
Just a sliver of Pete's South. If you zoom WAY in you can make out an avalanche crown.
Small surface hoar (and sunshine!) found at the ridgetop.
Another view of the Cornbiscuit glide during our descent.