Lawine

Avalanche: Snowbasin Backcountry

Hardesty, Chenoweth, FalleyOgden
Auf der Karte ansehen

Quick report

Slope Angle
42°

Avalanche

Slab Width
12 m
Weak Layer
Facets
Trigger Type
Skier
Vertical Fall
18 m
Avalanche Type
Soft Slab
Slab Thickness
41 cm
Trigger Detail
Intentionally Triggered
Start Zone Aspect
Northeast
Avalanche Problem
Persistent Weak Layer
Start Zone Elevation
2195 m

Steep rollover at 7200' in uncompacted terrain. Cracking noted in similar terrain. This slab had no wind effect and just enough cohesion to propagate 40' wide and 16" deep. Weakness was 1mm facets sitting just above an inch thick temperature crust.

Total snowpack there was 2-2.5'.

Very poor snowpack structure - 12" new above 4" very weak cohesionless squares above a 1" thick temp crust - as well described by Evelyn here the day before. Any significant storm at this elevation would produce a significant avalanche cycle. Unfortunately, the weather forecast looks a bit grim.