Route & General Observations
Standard Tenderfoot uptrack to first knob above treeline (~2,500′). Observation is from Saturday, December 17.
|Trigger||Natural||Avalanche Type||Soft Slab||Aspect||West|
|Elevation||2500ft||Slope Angle||36deg||Crown Depth||4in|
Numerous natural avalanches observed around Summit Lake - all on W-SW aspects and believed to have released sometime during the Dec. 15-16th storm. Bed surface was a 2mm crust that formed during the dry spell. This crust was observed on all aspects, at all elevations in advance of the storm.
Obvious signs of instability
|Recent Avalanches?||Yes||Collapsing (Whumphing)?||No||Cracking (Shooting cracks)?||Yes|
Small, shallow, touchy wind slabs in obviously loaded areas.
Clearing skies throughout the day, calm winds. 30*F at the lodge in the morning, dropping to 20* by sunset.
4-6" unconsolidated powder (in leeward areas, localized soft wind slabs >1' deep were observed)
Melt-freeze grains on the ground giving way to facets, capped with the aforementioned 2mm crust, now topped with 4-8" new powder. The shallow snowpack here got pretty hosed with the dry spell. Snow depth quite variable - 4-6" near ridges, over 3' in protected areas lower down.