Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Wil Henkel
Observation Date:
March 20, 2021
Submitted:
March 20, 2021
Zone or Region:
West North
Activity:
Skiing/Snowboarding
Location:
Iceberg Lake

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Soft Slab
Size:
Size 1: Relatively harmless to people
Elevation:
5200
Aspect:
SW
Comments:
Small skier triggered wind slab on Osama on way down to Hayes lake, triggered on small but steeper convexity over 35 degrees.
Photo:

Signs of Unstable Snow

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

Observations

Stormy but good travel and skiing conditions. We skied a second lap on Iceberg Bowl and found a recent small d1- d2 slab that had slide just below the Table Mountain ice climb. Crust found from last week's high pressure in varying places and depths due to wind loading. We were finding an interface in our hasty pits at about 7 inches down in many places that were having clean planar shears with relatively little force needed to pop. One incident of minor collapsing on the top of the East Gully on mt Herman on the same interface about 7 inches down. Good early spring storm riding.

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