Date of Observation: 01/26/2023
Name: Irwin Guides
Zone: Northwest Mountains
Route Description: Irwin Guides Cat-Ski tenure
Observed avalanche activity: Yes
Avalanches: 1st shot of the season in Eyes of the World ran O/G with a 3# hand charge on an
unsupported slope skiers left below the rock band. Impressive hard slab with car size blocks smoking small
trees.
New World HS-AE-R3-D2.5-O FC (180cm x 40m x 180m)
Weather:
Snowpack:
Photos:
Estimated avalanche date: 01/26/2023
Number of Avalanches: 1
Location
Location: Lake Irwin (Robinson Basin, Owen, Ruby)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: SW
Characteristics
Trigger: Explosive
Trigger modifier:
Type: Hard Slab
Failure Plane: Old snow
Size
Relative Size: R3 medium
Destructive Size: D2.5
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
Involvements
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Control results from Irwin tenure. First pass through this terrain of the year. 3# shot. unsuporrted slope.
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