Ski Lake Drainage

Location Name: 
Ski Lake Drainage
Region: 
BWRA
Date and time of observation: 
Tue, 04/03/2018 - 14:02
Location Map: 


Red Flags: 
Obvious avalanche path

Observation made by: Avalanche Specialist
Snowpit Observations
More detailed information about the snowpack: 

Lately we've been seeing the remnants of avalanches that occurred mid & post-storm, now over a week ago. Multiple Wind slab, Cornice fall, & a couple Deep slab avalanches were visible in my area. Evidence of Loose wet activity was seen on aspects receiving direct intense solar radiation. The N aspect that I dug into has a surface melt-freeze crust (2cm) that was frozen & fairly plastic. Below that mfc a thin layer of Near-Surface Facets had developed, possibly due to the temperature inversions during a few nights lately. My layer of concern is buried 30cm deep & is not easily detected. Amidst a thick layer of wind-broken precip particles, deposited in a drainage feature, is a very thin layer of buried factes. With hard force (21-22 taps) a resistant planar fracture occurs & is repeatable. Looking more closely at the nearby avalanches a keen eye can see this has been an interface where Wind slab avalanches have propagated.

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
None
More detailed information about the weather: 

Warm & sunny day with a light breeze from the WSW. The previous few days have had a temperature inversion. Last evening it was 28F degrees & surface snow (2cm) was frozen.