Date of Observation: 12/23/2022
Name: Irwin Guides
Zone: Northwest Mountains
Route Description: Irwin Tenure, East Barkmarker to Sunny Shoulder zone.
Observed avalanche activity: Yes
Avalanches: Triggered two additional D2s w/ HE. Same character as yesterday, running on 6-8″ of FCs.
Hollywood & Vine HS-AE-R2-D2-O FC (35cm x 20m x 100m)
Land of the Lost HS-AE-R2-D2-O FC (35cm x 15m x 75m)
Location: Lake Irwin (Robinson Basin, Owen, Ruby)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: SE
Trigger: Explosive
Trigger modifier:
Type: Hard Slab
Failure Plane: Old snow
Relative Size: R2 small
Destructive Size: D2 – could bury, injure, or kill a person
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Hollywood and Vine
Location: Lake Irwin (Robinson Basin, Owen, Ruby)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: S
Trigger: Explosive
Trigger modifier:
Type: Hard Slab
Failure Plane: Old snow
Relative Size: R2 small
Destructive Size: D2 – could bury, injure, or kill a person
Avg. crown height (inches):
Avg. width (feet):
Avg. vertical run (feet):
# of people caught:
# of partial burials:
# of full burials:
Additional comments: Sunny Shoulder Left
