Avalanche

Rock Creek: Even Skin Wax Won't Save You

Clancy NelsonEastside Region
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Observation photo 1Observation photo 2

Quick report

Collapsing
isolated

Dry snow transitioning to wet on solar slopes led to many loose wet instabilities and slow, heavy, sticky travel.

The snow stayed dry on northerly slopes.

Localized collapses in facets under a thin crust buried on 3/2. Crust/facet combo found above 9500 ft on northwest, north, and northeast aspects.

Weather

Air Temp
40s
Cloud Cover
clear
Wind Loading
none
Snow Avail For Transport
large amounts

Calm, clear spring day with occasional light winds from the northeast. Dry snow is available on northerly aspects.

Snowpack

Average snow depth near treeline: 130 cm.

Old persistent weak layer down an average of 70 cm. Improvement in this layer: see snow profile. 

Crust/facet combo buried 3/2 down average of 25 cm on northwest-north-northeast above 9500 ft. Localized collapses, sudden CTM results. No propagation in ECT or PST tests.

Localized cracking in recently deposited wind slabs.

Avalanche

Size
D2 R2
Type
WL
Count
4
Aspect
SE
Trigger
N
Elevation
11000 ft