Leavitt Road Slidepath #1

Location Name: 
Repeat Offender
Date and time of avalanche (best estimate if unknown): 
Tue, 01/09/2018 - 13:37
Location Map: 

Red Flags: 
Recent avalanche activity
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Obvious avalanche path
Terrain Trap

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Trigger type: 
Crown Height: 
2 ft
Avalanche Width: 
Below Treeline
9 360ft.
Bed Surface: 
Old Snow
Avalanche Length: 
Did the avalanche hit a building, vehicle, or structure?: 
More detailed information about the avalanche: 

Rain made it way up to just below 10,000' & a wet snow mixture all across the BWRA reigned. Rain dominated the sky until 9000' & a saturated snow surface was visible. The depth of wetter snow increased as you descended. At my pit location, just above the elevation of this slide, the snow was moist for almost 7cm (2.5") & it sat on drier snow. A perfect loose wet avalanche scenario had taken shape with the ability to see +25 wet slides & roller balls. My particular wet slab avalanche I saw was the only one of its kind to be seen. The location is NW of Leavitt Road & is the first suspect slide-path you encounter as you climb, I call it the "Repeat Offender." Last season this path created some historically large slab avalanches that were pictured in "The Avalanche Review." Yesterdays event was not as dramatic as the previous but it is interesting to us nonetheless. For scale the R2D2 avalanche had a crown height of <2', was almost 200' wide & ran nearly 500'. The debris is still 600' from touching the road & looks to be 20' deep. This avalanche could easily bury a human after the trauma of being tossed through rocks & trees. Lots of loud whumphing occured throughout my travels & you could hear it propagate through the snowpack as you stepped.

Avalanche Photos: 
Snowpit or crown profile photo or graph: 
Weather Observations
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Above Freezing
Mixed rain and snow
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Rain made its way up to just below 10,000' & a wet snow mixture fell all across the BWRA. Temperatures were 2.6C & cooling to near freezing as I worked. Rain changed to a mixture of snow & rime than large clusters of stellars were falling as I left. No winds to report. The fog that was there upon arrival was descending & a moisture rich cloud was taking its place.