Koenig Lake

Location Name: 
Koenig Lake
Region: 
BWRA
Date and time of avalanche (best estimate if unknown): 
Mon, 04/02/2018 - 11:48
Location Map: 


Red Flags: 
Obvious avalanche path

Observation made by: Avalanche Specialist
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
48degrees
Trigger type: 
Natural
Crown Height: 
4 ft
Aspect: 
East
Weak Layer: 
Old Snow
Avalanche Width: 
200ft.
Terrain: 
Above Treeline
Elevation: 
10 000ft.
Bed Surface: 
Old Snow
Avalanche Length: 
155ft.
Number of similar avalanches: 
5-10
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: 

None of these avalanches are very recent but they are also not small. The first photo is of a Wind slab avalanche that is at least 4 days old R2D2. The slab looks to have failed at an interface 2' deep then stepped down into another Slab an additional 2' deep. Interestingly there are anti-tracks on the old bed surface now reexposed. The next two photos are of a large slab that broke above the Virginia Lakes road, likely helping to keep the road closed. The wind accumulations on this feature at this location get dramatically deep. This R2D3 Wind slab avalanche was likely triggered naturally by the addition of rain on snow during the last storm. It had the potential to bury a vehicle & even destroy a small building.

Avalanche Photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Moderate
Precipitation: 
None
Air temperature trend: 
Static
Wind Direction: 
West
Accumulation rate: 
None
More detailed information about the weather: 

Patchy clouds with moderate winds from the west. Around 40F degrees at 10,000'