Date of Observation: 01/04/2023
Name: Dave Kozlowski
Zone: Northwest Mountains
Route Description: Robinson Basin
Observed avalanche activity: Yes
Avalanches: See photos of a very wide propagating persistent slab avalanche in Robinson Basin, likely ran the night of 1/3 to 1/4.
Location: Lake Irwin (Robinson Basin, Owen, Ruby)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: SE
Trigger: Natural
Trigger modifier:
Type: Soft Slab
Failure Plane: Old snow
Relative Size: R4 large
Destructive Size: D2.5
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Robinson Basin
