Avalanche: Oscar Mayer-east

Observer Name
Michael Ward
Observation Date
Friday, March 5, 2010
Avalanche Date
Friday, March 5, 2010
Region
Logan » Logan Dry Canyon » Oscar Mayer-east
Location Name or Route
Elevation
8,200'
Aspect
North
Slope Angle
40°
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Weak Layer
Surface Hoar
Depth
14"
Width
100'
Vertical
300'
Caught
1
Comments

East of Oscar Mayer in the glades about mid-slope (8,200’), I unintentionally, but not surprisingly, triggered a soft slab while up tracking across the top of a regularly skied slope. I quickly dug into the bed surface of this slow moving slide and was not caught. The slide had a 100’ crown and was on a north aspect. This slide sympathetically triggered another slide 100’ down slope. The crown on the second slide was around 75’. The slides together ran about 300’. The fracture from the first slide occurred on the top of a small 40 degree rollover. The second slide occurred on a slope of about 35 degrees. Both slid on the surface hoar layer 14” down. A few minutes before the slide, I dug a quick pit on a 33 degree north facing slope after seeing a shooting crack propagate 6’ from my ski tip. The results were CT16/Q2 and then CT14/Q1. Both tests failed on the surface hoar layer. The increased slope angle was obviously enough to get things going.

Comments

We'll want to remember this as an involvement, perhaps not an accident ...... Nice job self-arresting in the bed surface and not getting carried down with this dangerous avalanche....

Coordinates