Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Name:
Erik Olson
Observation Date:
February 13, 2021
Submitted:
February 13, 2021
Zone or Region:
Snoqualmie Pass
Activity:
Skiing/Snowboarding
Location:
Near Hyak

Triggered Avalanches

Did you trigger any avalanches? 
Yes
Was it intentional? 
Yes
Avalanche Type:
Soft Slab
Size:
Size 1: Relatively harmless to people
Elevation:
3500
Aspect:
W
Comments:
Multiple remote and ski triggered size 1 slides. Storm snow very touchy to any trigger

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Hard Slab
Size:
Size 1: Relatively harmless to people
Elevation:
3300
Aspect:
W
Comments:
Wind slab triggered remotely on boot pack. 4’ deep near crown. Not a lot of snow moved, but close to a 1.5 size

Signs of Unstable Snow

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

Observations

Widespread cracks on any slope >30. Seemed to be sliding on new/old interface. If you think it could slide, it would slide.

Advanced Observations

Observed Avalanche Problem #1: 
Storm Slab
Comments: 
All aspects and elevations, D1, very likely, 20 cm
Observed Avalanche Problem #2: 
Wind Slab
Comments: 
West aspects for bigger slab, D2, very likely, sliding on 2/6 rain crust
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