Avalanche

Mt Emmons

Evan RossGunnison
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Observation photo 1Observation photo 2Observation photo 3Observation photo 4Observation photo 5Observation photo 6Observation photo 7Observation photo 8

Quick report

Cracking
specific
Collapsing
specific

Collapses and shooting cracks on easterly facing terrain. Quieter with fewer collapses on SE-facing slopes.

Weather

Cloud Cover
scattered
Wind Loading
light
Recent Snowfall
75
Snow Avail For Transport
large amounts

A few light snow showers with cloud cover decreasing through the day. Light to moderate northwesterly winds at ridgeline with light drifting.

Snowpack

See specific avalanches or video for a few more details. 

Avalanche

Size
D3
Type
SS
Count
3
Aspect
SE
Trigger
N
Elevation
12300 ft

My best estimate is that this avalanche ran during the early AM hours of 11/27. There was about 6" of new snow on the bed surface of the avalanche. Google Earth measures the crown width at over 4,000ft, spanning multiple aspects from NE to E to SE. The length of the avalanche was around 3,000ft, as it ran from a starting elevation of 12,300ft down to 10,900ft. A quick observation on the SE portion of the crown looked like the avalanche failed by collapsing a thin crust capping 5cm of soft and lightly faceted snow. That snow accumulated last Sunday before being buried on Tuesday, 11/26. Here, the crown was 70cm thick with a total HS of 110cm.