Avalanche

Cave Bowl

Noah McCorkelTetons
View on map
Observation photo 1Observation photo 2Observation photo 3Observation photo 4

Quick report

Cracking
specific
Collapsing
specific

We observed 5 small (D1) avalanches on the approach and one larger (R3-D2) avalanche in Cave Bowl. 2-3 inches of new snow deposited on top of the debris piles indicate that the avalanches released sometime in the early evening on 12/2. The avalanche in Cave Bowl was about 15-20 inches deep and failed at the old/new snow interface. The avalanche propagated several hundred feet across the slope (see photo). Stability test results from a pit dug adjacent to the avalanche yielded an ECT P 14 at the old/new interface (see attached pit). Warm temps associated with the most recent snow pulse made for "upside down conditions".

Observed 5 small (D1) natural avalanches on the approach. One crossed the skin track. Experienced multiple collapses traveling from the Windy Ridge summit to Cave Bowl.

Weather

Air Temp
30
Cloud Cover
overcast
Wind Loading
none
Recent Snowfall
20
Snow Avail For Transport
moderate amounts

Lightly snowing (S1), calm winds, and temps near 30 deg F.

Snowpack

Observed storm totals of about 20 inches (50cm) at 9,000'.  Noted settlement cones around tree trunks. 

Avalanche

Size
D2 R3
Type
SS
Aspect
NE
Trigger
N
Elevation
9000 ft