Observation: Maybird Chute

Observation Date
1/1/2015
Observer Name
Tyler Falk
Region
Salt Lake » Little Cottonwood Canyon » Maybird Chute
Location Name or Route
Maybird Chute, LCC
Weather
Sky
Clear
Wind Direction
Northwest
Wind Speed
Light
Weather Comments
Light to moderate wind on ridges with some transport going on at times.
Snow Characteristics
New Snow Depth
20"
New Snow Density
Medium
Snow Surface Conditions
Powder
Dense Loose
Wind Crust
Melt-Freeze Crust
Damp
Snow Characteristics Comments

Variable snow surface conditions with moist snow up to 9,500 on S,SW,SE aspects this morning.

Red Flags
Red Flags
Heavy Snowfall
Wind Loading
Avalanche Problem #1
Problem
Wind Drifted Snow
Trend
Decreasing Danger
Problem #1 Comments

A few small wind slabs a few inches thick out there today on southwest through southeast aspects.

Avalanche Problem #2
Problem
Persistent Weak Layer
Trend
Same
Problem #2 Comments

We stuck to southerly aspects to avoid the persistent slab problem. I am sure it is out there and I am not jumping onto any aspect other than south for right now. It can be most likely triggered on thinner areas possibly outside the upper Cottonwoods in my opinion.

Comments

Our travels today were on the southern aspects. Damp snow with a variety of crusts to 9,500. A few small wet slides were on the southwest aspects down low in Maybird from yesterday. Around 155cm of snow of at 10k on south aspects. ECTN and PST 82/125 End at 55cm on a south aspect at 10k. Light to moderate wind transport going on along the highest ridges from the northwest but not all day.

I have not dug a ton on shady aspects lately but the few I have looked at the past few days, I have found stronger snow than expected. A few ECTN's and CTN's . I'm sure there is plenty of areas out there that you could get a Q1 shear. I assume that you would find this problem in a thin area shady aspect, outside the upper cottonwoods, and maybe on a slope that has already avalanched. As others have said, it is a low probability high consequence persistent slab problem out there right now. There is a lot of spacial variability out there. In my opinion, the southern aspects from where we were today has high strength, moderate to strong structure, and low energy.

Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate