Irwin Area Explosive Results

CBACCBAC Observations

Date of Observation: 03/01/2023

Zone: Northwest Mountains
Route Description: Irwin Area

Observed avalanche activity: Yes
Avalanches: E aspects reactive to AE 4F+ slabs failing on a small grained FC layer from the 2/26
interface. Knocked out some of the hang fire from Pre E and jumped with all our might on the rest but only
got it to inch down but wouldn’t budge.
Premature Evacuation SS-AE-R1-D1.5-I FC (70cm x 23m x 54m)
NC Shooter SS-AE-R1-D1-I FC (40cm x 15m x 53m)
Hollywood & Vine SS-AB-R1-D1-I FC (30cm x 15m x 50m)s

Snowpack: W aspects BTL lacked any slab in the recent storm snow. The 2″ from last night was
reactive and picked up enough speed to run full track on terrain >37 deg. 30-70 cm thick cross loads on EBM .
Buried MFC on Sunny shoulder seem to be breaking down and getting weaker.