Observation: NWAC Forecaster

All Observations

Basic Information

Observation Details

Observation Date:
March 21, 2022
Submitted:
March 21, 2022
Observer:
NWAC Forecaster - Matt Primomo
Zone or Region:
Stevens Pass
Location:
Stevens Pass

Signs of Unstable Snow

Recent Avalanches? 
Yes
Cracking? 
Isolated
Collapsing? 
None Experienced

Media/Attachments

Large slide beneath the north side of Susan Jane Peak.

Advanced Information

Weather Summary

Wind:
Light , W
New/Recent Snowfall:
~20cm new snow

Observed light snow in the morning, with rain below 3,500ft or so east of the pass by 11am.

Avalanche Observations

 #  Date Location Size Type Bed Sfc Depth Trigger Photos Details
1 Mar 21, 2022 10:00 am
() 		Fleur de Lis
N 5000ft 		D1.5 U-Unknown
Large slide beneath the north side of Susan Jane Peak.
Report
Fleur de Lis

Was able to easily release small loose slides from steeper features below 5,000ft by 10am, and noticed a number of mostly small, very recent natural loose wet slides from steep NTL/BTL terrain. One slide was larger (D1.5 in Fleur de Lis) but unknown if it initiated as a storm slab or loose slide with poor visibility.

Snowpack Observations

Slightly upside-down new snow in the morning, but was not super dramatic. Tilt tests did highlight the new/old interface about 20cm down on a NW aspect at 5,400ft. I also found the 3/8 layer containing small dry facets above the early March crust, 30cm down in this location, on a windward aspect.

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