Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Craig
Observation Date:
December 29, 2022
Submitted:
December 29, 2022
Zone or Region:
Snoqualmie Pass
Activity:
Skiing/Snowboarding
Location:
Avalanche Mnt

Signs of Unstable Snow

Did you see shooting cracks? 
Yes, Isolated
Did you experience collapsing or whumpfing? 
No

Observations

traveled up to 5k' on Avalanceh Mnt via Source Lake and Snowlake Divide . The switch from W to S winds noted late morning, and while most stransport seemed to be on lee N slopes, we observed crossloading and wind effected snow on all aspects. We observed widespread 5-20 cm windslab formation with small skin track cracks - test slopes were unreactive. We were curious about some of the easier, clean hand shears on a mid storm interface about an inch above the Christmas crust . @ 5000ft, W aspect, HS 145 cm, 38 cm storm snow resting above 1cm Christmas crust above 10cm melt forms, above wet grains that went well below a meter down - potentially to the ground. ECTN down 35 cm (mid storm interface - potentially some graupel).

Advanced Observations

Observed Avalanche Problem #1: 
Wind Slab
Comments: 
NTL/ATL , 10-20cm , all aspects, likely, D1-D2
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