Tincan up to 2,300’ – storm day with intense precip and poor visibility
Easily triggered ski cuts on steep test slopes. Slabs were barely forming and only found on wind loaded rolls.
|Cracking (Shooting cracks)?||Yes|
Cracking on wind affected steep slopes no greater than 15’ long
Ski cuts produced 10-12” soft slabs on 40 degree test slopes (see video)
Snow, heavy at times, accumulation ~6” between 11am and 3pm
Rain/snow line steady @ 500ft
Moderate NE winds
Mild temps, 32 F @ 1,000’
8-16” new snow total above 2,000’ with variability due to winds
12” total at road level by 3pm
Parking lots obs: Tincan 12”, Sunburst 6-8”, Johnson Pass 2”
Multiple hand shears on all aspects showed a lack of cohesion in the new snow (no slabs) and good bonding between the new snow and underlying surfaces.
Underlying surfaces - 3-4” crust above 2,000 , 3-12” wet layer 1,000’-2,000
Test result in a pit @ 2,100’ showed advanced melt freeze grains that were mostly in the melt phase (Fist hardness). This structure could cause problems in the form of new slabs stepping into this wet layer and producing deep wet loose avalanches. A major heat up or intense rain would precipitate this scenario. The presence of the crust at the present time is preventing this from happening.