Avalanche

Lower Blue Lake

Travis FeistCentral Sierra Nevada
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Observation photo 1Observation photo 2Observation photo 3

Quick report

We agreed not to go into avalanche terrain today, and then saw several recent avalanches to reinforce that decision. Informal and formal tests showed multiple concerning weak layers in the top 100cm of snow. One of my riding partners unintentionally remote triggered a size D2 avalanche that failed on facets just above the mid-December rain crust. He was in flat terrain when it happened and nobody was caught.

Several recent natural avalanches, unstable snowpack tests, and an unintentional remote triggered avalanche

Weather

Cloud Cover
few
Wind Loading
moderate
Recent Snowfall
30
Snow Avail For Transport
large amounts

Cold and sunny day with increasing winds in the afternoon

Snowpack

Pick your poison of weak layers today: We saw recent wind slab avalanches, and avalanches that failed on deeper facets. A snowpit at 8800ft on a N aspect showed facets above the mid-December rain crust, and the Jan 2nd double facet layer above that. 

Avalanche

Size
D2 R3
Type
SS
Aspect
N
Trigger
AM
Elevation
8800 ft

Remote triggered from above. Failure was facets above mid-December rain crust