Date of Observation: 01/25/2023
Name: Irwin Guides
Zone: Northwest Mountains
Route Description: Upper Upper Westwall mitigation work.
Observed avalanche activity: Yes
Avalanches: Shallow wind slabs (4-6″ deep) ATL on W aspects specific to terrain features. Large HE tests in the New World produced cracking to the ground in loaded pockets in the Thimble. In Thread/ Needle the AB only released surface snow which picked up enough speed to almost run full track. 1 large collapse with 3# covershot in the entrance to Thread.