Avalanche: Cardiac Bowl

Observer Name
Matt sterbenz
Observation Date
Wednesday, March 8, 2017
Avalanche Date
Wednesday, March 8, 2017
Region
Salt Lake » Big Cottonwood Canyon » Cardiff Fork » Cardiac Bowl
Location Name or Route
Lower Cardiac Bowl
Elevation
10,200'
Aspect
Northeast
Slope Angle
40°
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Wind Drifted Snow
Weak Layer
Density Change
Depth
16"
Width
250'
Vertical
350'
Caught
1
Comments
Traversing out to Cardiac. 1 skier already through. Fractured occurred with 2 trailing skiers on slope. No injuries, one caught, the other skied it through skins on. Upside down wind packed snow. Sketchy.
Comments

UAC comments


We visited this avalanche today (March 9th). What really stood out to me was the width of this slide. It was easily 250 feet wide or more. It was the result of down slope winds that formed a wind slab on top of soft snow that fell during the Sunday/Monday storm (March 5/6). As we approached the site, the stratigraphy was obvious (always is in hindsight) as our skis punched through the wind slab into the softer snow underneath it.

The wind slab was really hard and the snow underneath was really soft. This combination alone can makes good avalanches; however..... I don't think we heard of or observed any faceting of the new snow on Tuesday, but it's entirely possible. This place can get warm then cool significantly which could have faceted the snow surface just a little bit. It was hard to tell looking at the snow crystals. They were mostly broken, decomposing stellars.

Isolated problem and I would be surprised to see more like it.

Photos by A. Nassetta

Coordinates