Detailed Observation

Date2021-10-10
LocationEastern Alaska Range
ObserverNathan Fogell
AvalancheN

General Observations

Rainbow Peak climb attempt. 
observation 1:

test pit: 5,074ft South facing

CTN (no fracture)  

32 degree slope, 65cm snow depth, ~63cm knife hard wind slab with facets forming on Rocky bed surface.

Observation 2: 6,650ft

40 degree slope, ~ 66cm snow depth, full depth knife hard wind slab. Facets on Rocky bed surface. stepped forward and heard Whumphing, collapse, and propagation ~20ft in every direction. No visible cracks, retreated down couloir

 

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Weather Observations

Observed Avalanche Activity