Happy Holidays!! We depend on your support, please consider including the UAC in your holiday giving.

Avalanche: Diamond

Observer Name
David Rosenberg
Observation Date
Sunday, December 1, 2019
Avalanche Date
Sunday, December 1, 2019
Region
Logan » Logan Dry Canyon » Logan Peak » Diamond
Location Name or Route
Logan Peak - Diamond (west face)
Elevation
9,500'
Aspect
Northwest
Slope Angle
Unknown
Trigger
Natural
Avalanche Type
Soft Slab
Avalanche Problem
Wind Drifted Snow
Weak Layer
New Snow/Old Snow Interface
Depth
12"
Width
300'
Vertical
200'
Comments
Lots of wind actions last night and today. Skin and ski tracks from yesterday in the area were covered up this afternoon. Even covered up in places on the second lap. This avalanche broke on Logan Peak's west face near where the summer trail meets the ridge. The slide was about 300' wide and only ran 200 vertical feet -- not even close to the full path length. The slide stepped down only 1' or so, no brush or ground visible in the bed. Snow depth in nearby areas was 2' to 3'. The crown had an oblong V shape, like it broke at the apex and the spread laterally 150' in each direction. A week ago or so, this area was bare or had a very small amount of ground snow. My working assumption is that the overnight wind blew a soft wind slab that then broke last night or early this morning. Folks in town can probably get better photos with their high-zoom cameras, if of course the wind doesn't fill the whole thing back in tonight.
Coordinates

Support the Avalanche Center through your purchases

Discount lift tickets
All proceeds from ticket sales benefit the UAC when you purchase your next lift tickets.
Need new gear?
Make your next purchase from our Affiliate Partners and the UAC will receive a portion of the sales.
Shop
Sign up for our newsletters, emails and daily forecasts to stay up to date.
Subscribe