Quick report
- Slope Angle
- 39°
Avalanche
- Slab Width
- 15 m
- Weak Layer
- Facets
- Trigger Type
- Snowboarder
- Vertical Fall
- 76 m
- Avalanche Type
- Hard Slab
- Slab Thickness
- 41 cm
- Trigger Detail
- Remotely Triggered
- Start Zone Aspect
- East
- Avalanche Problem
- Persistent Weak Layer
- Start Zone Elevation
- 2957 m
This turned out to be a very interesting avalanche and possibly near miss.
Raymond Shoulder. Elevation 9740' at 096°East facing with just a touch of south. Crown height ranged from 25-65cm; average 40cm. 50' wide. Reportedly triggered by splitboard party of two. Wind not a factor.
Remotely triggered, though just barely - 5 to 10' away. There were probably a dozen tracks off the shoulder into Mill A basin prior to the avalanche. Avalanche looks similar to the Toots to Boot avalanche from Monday with similar layering/history though accounting for aspect.
Weakness was 2cm of .5-1mm rounding but loose facets sandwiched between two mf crusts. Third photo has the red line along this weakness. Only two of six ECT tests elicited full propagation in the moderate and hard category. No collapsing or cracking noted.
Overall height of snow was roughly 115cm with various crusts and plenty of very weak facets and depth hoar. Could be an interesting wet avalanche cycle this spring.
It's late; will upload a crown profile tomorrow.