Stevens Pass Avalanche Preliminary Report

NWAC has the preliminary report [pdf] for the Stevens Pass – Tunnel Creek avalanche that killed 3.

Here’s the high level overview:

Slope specifics: starting zone elevation 5800 ft, SSW exposure, 42 degree slope

Fracture line details: SS-AS-O-R2-D3; Slab size and structure—32 inch deep x 200 ft. wide soft slab (Fist to 4F hardness) released to surface hoar layer above early February crust (Pencil hardness)

Avalanche details: Slide caught 5, one of whom was able to arrest by holding onto tree; remaining 4 caught were carried about 2650 vertical feet through a twisting, tree ringed chute

Fatalities / Injuries: Three skier fatalities, one skier caught, deployed air bag, partially buried, uninjured, and extricated with the help of rescuers

Leave a Reply

Your email address will not be published. Required fields are marked *