Date of Observation: 12/12/2021
Name: Irwin Guides
Zone: Northwest Mountains
Route Description: Thornton’s Glade
Observed avalanche activity: Yes
Avalanches: SS-ASc-R2/D2-G 70-100cm x 10-20m x 100m running on moist basal FC. West aspect NTL.
Triggered on an ~36 deg planar slope that harbored a nice swath of pre-12/6 FC.
Location: Lake Irwin (Robinson Basin, Owen, Ruby)
Location Specific:
Start Zone Elevation: NTL: Near Tree Line
Aspect: W
Trigger: Skier
Trigger modifier: Controlled
Type: Soft Slab
Failure Plane: Ground
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: Thorton’s Glade
