Large persistent slab triggered at Irwin

CBAC2020-21 Observations

Date of Observation: 02/21/2021
Name: Irwin Guides


Zone: Northwest Mountains
Location: Irwin
Aspect: West
Elevation: NTL


Avalanches: Field of screams. Single hand shot in a slight gully feature that had been loaded from SW winds left a fractured slope. Fracture ran approx. 100′ and was open to the ground. Tested the slope
after w/ a 10# AB resulting in a size 2 HS braking several medium sized trees and running full track. Field of Screams HS-AB-R2-D2-O (50cm x 30m x 350m). The slab was isolated to that feature Remotely triggered wind slab Castle Valley.