Speedy dry sloughs near treeline

CB Avalanche Center 2018-19 Observations

Location: Kebler Pass Area
Date of Observation: 04/03/2019
Name: Eric Murrow

Subject: Speedy dry sloughs near treeline
Aspect: North, North East
Elevation: 9200′-12000′


Observed several natural, tree bomb triggered, dry loose. Skier triggered numerous dry loose in steep, NTL terrain.

Weather: Cloudy skies with periods of snow, heavy at times. New snow accumulations at 12,000 feet, 1pm was 4 inches. Winds were lighter than expected, under 15mph while in open terrain at 12k. Visibility was limited but hung out for 30 minutes in open ATL terrain and observed almost no transport.

Snowpack: Visibility was too poor to venture into terrain with possible Wind Slab development. Skiing in steep NTL protected terrain produced fast moving shallow sloughs. Sloughs were able to entrain just a small amount of old snow at NTL elevation. Snow surface remained dry on northerly slopes down to about 10,400′ before becoming moist.