After Avalanche Investigation @ Leavitt Creek

Location Name: 
After Avalanche Investigation @ Leavitt Creek
Region: 
BWRA
Date and time of observation: 
Sun, 04/16/2017 - 12:30
Location Map: 


Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path

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

As Thursdays storm entered the BWRA it was pushing out a warm air mass quickly. The arrival of this front brought a long duration of snow in the form of Graupel. Graupel is a supercooled water droplet & is the product of heavy riming. Graupel reminds me of popcorn in appearance & characteristics. The problem with this form of snow is that it holds its shape & does not bond well to itself or the layers of snow around it, creating a lot of air space. After new, better bonding & wind slab forming, snow fell on top of this Graupel layer it became the weakest layer. After a couple turns & a steepening of the slope this snowboarder triggered failure in the wind-slab which sat on this weakness causing an avalanche.

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Graupel Layer
Leavitt Crk Avalanche Investigation
Leavitt Crk Avalanche Investigation
Leavitt Crk Avalanche Investigation
Leavitt Crk Avalanche Investigation
Any other comments about the observation or links to outside pages that have more info on the observation: 

If you happen to see or be involved with an avalanche please send us an observation. This can help us better understand the circumstances with respect to time & space, improving information flow.

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
50% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Moderate
Precipitation: 
None
Air temperature trend: 
Cooling
Wind Direction: 
West
Accumulation rate: 
None
More detailed information about the weather: 

Sunny with moderate winds 5-15 mph. A storm front was rolling into the BWRA & light snow was beginning to fall.