Public Observation #2023-1175
Submitted:May 24, 2023 8:30 PM
Observation Date:May 22, 2023
Zone or Region:Central Cascades
Location:Middle and North Sister
Did you trigger any avalanches?Yes
Was it intentional?Yes
Avalanche Type:Wet Loose
Size:D1: Relatively harmless to people
Comments:Diller Headwall sz 0.5 very small and slow moving loose avalanche, ran 1000 ft.
Did you observe any avalanches?Yes
Avalanche Type:Wet Slab
Size:D3: Could bury and destroy a car, damage a truck, destroy a wood frame house, or break a few trees
Comments:East face of Middle Sister. Ran 1200+ feet. Approximately 400 feet wide. Crown depth varied from approximately 5-10 feet. Would call this a size 3.5.
Signs of Unstable Snow