NW Leavitt Cirque

Location Name: 
NW Leavitt Cirque
Region: 
BWRA
Date and time of avalanche (best estimate if unknown): 
Tue, 01/01/2019 - 23:08
Location Map: 


Red Flags: 
Recent loading by new snow, wind, or rain
Rapid warming
Obvious avalanche path
Terrain Trap

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Dry
Slab
Slope: 
50degrees
Trigger type: 
Natural
Crown Height: 
3 ft
Aspect: 
Northwest
Weak Layer: 
Other - explain below
Avalanche Width: 
70ft.
Terrain: 
Above Treeline
Elevation: 
10 400ft.
Bed Surface: 
Old Snow
Avalanche Length: 
600ft.
Number of people caught: 
0
Number of partial burials: 
0
Number of full burials: 
0
Did the avalanche hit a building, vehicle, or structure?: 
No
More detailed information about the avalanche: 

The Leavitt Lake cirque cornice that grew over the recent duration of strong winds could not sustain. The mass released from the ridgeline cirque & crashed into isolated layers of windpacked snow. The event caused a 3' step-down failure in old wind loaded slabs, avalanching more snow. R1D2 with chunks the size of refrigerators.

Snowpit or crown profile photo or graph: 
Full view
Big chunks
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Above Freezing
Wind Speed: 
Calm
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
South
Accumulation rate: 
None
More detailed information about the weather: 

Sunny with increasing whispy cirrus clouds 3.4C. NO Wind, amazing!