LARGE AVALANCHE ON MT ROWLEY: LIKELY FROM THE MARCH 17-20th, 2026 ATMOSPHERIC RIVER
Observed Monday March 23rd @ 0900hrs.
Posting for historical reasons (and apologies for the delay - out of range at Campbell Icefield Chalet).
Avalanche seen from outside the front door of the lodge: 23 km away as the crow flies, measured on CalTopo.
Numbers below taken from Google Earth estimates based on the attached photo.
Width: 1300m
Crown: 2m (estimate - if you can see a crown clearly defined from 23km away, I'd guess it's at least 2m high... but it may be 3m +)
Distance: estimate 200m average (range 100-300m). Could not see debris piles from the chalet.
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Mass: 1300m x 2m x 200m x 200 kg/m3 (conservative average snow density) = 104 million kg (~115,000 tons).
Size 5 avalanche defined as greater than 100,000 tons.
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