Avalanche

Mt. Henderson

B. FredlundCooke City
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Quick report

Collapsing
widespread

Widespread natural avalanche activity from last 24 hrs. All persistent slab avalanches, failing on snow near the ground. All avalanches observed were in mid and upper elevation terrain, east through north aspects. Numerous collapses- but not obvious unless you were listening closely. Multiple collapses while recycling our skin track, and not while setting the skin track (bridging). HS ranged from 120-170cms where we were traveling. On a north aspect at 9500' we had a HS135, and ECTN25 at 43 (4F, 2mm rounding facets were LOC).

Weather

Cloud Cover
overcast
Wind Loading
moderate
Recent Snowfall
10-15
Snow Avail For Transport
large amounts

Mostly cloudy with snow flurries. Blustery west winds, transporting a lot of snow in the exposed locations. 3-5cms of accumulation during our ski tour.

Avalanche

Size
D2
Count
3
Aspect
NE
Trigger
N
Elevation
9300 ft

Photo by Brain Boyle. Brain also noted another half dozen persistent slab, natural avalanches up near Lulu Pass today.