Northwest Avalanche Center

Observation: Public

All Observations

Observation Details

Observation Date:
March 3, 2021
Submitted:
March 3, 2021
Zone or Region:
East Central
Activity:
Skiing/Snowboarding
Location:
Grindstone, Snowgrass

Observed Avalanches

Did you observe any avalanches? 
Yes
Avalanche Type:
Hard Slab
Size:
Size 3: Could bury and destroy a car, damage a truck, destroy a wood frame house, or break a few trees
Elevation:
ATL
Aspect:
NE
Comments:
Multiple large deep persistent slab avalanches from the 2/22 or 2/25-26 cycle are visible across the Chiwaukum Range. These were largely above treeline, but we also saw NTL persistent slab slides to D3 on multiple aspects around the Jay Creek, Big Slide Creek, Chatter Creek, and Hoxsley Creek drainages.
Photo:

Signs of Unstable Snow

None reported

Observations

Remnants of the 2/22 and 2/26-27 cycles are everywhere in the east central zone. Warming and cornice fall could continue to test the January persistent weak layer/deep persistent slabs.

Media

Avalanche crowns in the core Chiwaukum.

Advanced Observations

Observed Avalanche Problem #1: 
Wet Loose
Comments: 
Southerly aspects were opening up and shedding rapidly mid-day.
Observed Avalanche Problem #2: 
Cornice
Comments: 
Getting big and going to be tested by warming.
Observed Avalanche Problem #3: 
Deep Persistent Slab
Comments: 
Evidence of deep persistent slabs all over the east central zones.
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