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Taos Avalanche Center

Professional Observation

Basic Information

Observation Details

Observation Date:
February 25, 2021
Submitted:
February 25, 2021
Observer:
TAC - Andy Bond
Zone or Region:
Taos Area
Location:
Williams Lake Area

Signs of Unstable Snow

Recent Avalanches? 
None Observed
Cracking? 
None Experienced
Collapsing? 
None Experienced

Snow Stability

Stability Rating: 
Good
Confidence in Rating: 
Moderate
Stability Trend: 
Worsening

Bottom Line

Faceted weak layers deeper down in the snowpack continue to linger especially in shallow snowpacks less than 2m in depth. It's becoming more and more difficult to trigger an avalanche but the consequences would be incredibly high if you did get a slope to release. The weak layers of concern are mainly near the ground and would produce an avalanche that would take with it, the entire season's snowpack.

Media

Shallow snowpacks like this one below treeline continue to have facets lingering deeper down in the snowpack with settling stiffening slabs on top from last week's snowstorm.  These facets have been slow to heal and gain strength.
A natural persistent slab avalanche from last weekend. It's a good reminder before this next storm and loading event of how large a deeper persistent slab avalanche can be.

Advanced Information

Weather Summary

Cloud Cover:
Mostly Cloudy
Temperature:
12 - 30
Wind:
Moderate , SW

A mix of sun, clouds and light flurries this morning that was not amounting to any snow accumulation. A little bit of transport going on at ridgetops from the 1 to 2 inches that fell in the early morning hours.

Snowpack Observations

1 to 2 inches of low-density snow fell early this morning creating dust on crust conditions on solar aspects and pretty good skiing on northerly aspects. Warm temperatures and sun last week have created varying degrees of crusts near and below treeline.

Continue to find shallow snowpacks with lingering faceted weak layers deeper down in the snowpack. It's these shallower snowpacks (less than 2 meters) that facets have been slow to heal. Stability tests in multiple tests was producing moderate to hard results to get these weak layers to fail and propagate.

Avalanche Problems

Problem Location Distribution Sensitivity Size Comments
Persistent Slab
Isolated
Specific
Widespread
Unreactive
Stubborn
Reactive
Touchy
D1
D1.5
D2
D2.5
D3
D3.5
D4
D4.5
D5
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