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Multiple sz 2.5-3 Avalanches Blackcomb Glacier

Observed Apr 28, 2023, 9:00 a.m. PDT · Southwest Coast

This report was submitted with an older form.

Size 3 Na avalanche Boney Basin. Note patroller upper skiers right for scale. Large unsurvivable debris. Size 3 Boney Basin crown line 1-1.5m deep. Size 2.5 Na phalanx ridge (s-turn area). Note large trees in the debris. Size 2.5-3 cycle Phalanx ridge Size 2.5-3 Na avalanche Poop Chutes. Note crown line up to 3m deep. Size 2.5-3 Na poop chutes. Debris ran down to valley bottom. Size 2.5-3 Way Poopy

Avalanche report

Comment
Starting the evening of Wednesday April 26th and through today, multiple sz 2.5 - 3 Na persistent slab avalanches have released along Phalanx ridge above the Blackcomb Glacier. Most notable was a sz 3 out of Boney Basin which occurred Wednesday evening during the beginning of the warming trend (see photos). Husume, Corona, S-turn and the poop chutes have also ran naturally sz 2.5-3 over the last couple days. Photos attached have been taken by ski patrol documenting the activity which has mostly occurred between the late morning and late evening daily over the last few days. We have also seen Na sz 2-2.5 avalanches running in Lakeside Bowl and have documented up to sz 3 avalanches occurring in Garibaldi provincial park as observed from the ski area. Please pay attention to the current SPAW - there is an active/ongoing wet loose/wet slab/persistent slab natural avalanche cycle occurring in the backcountry.
Run length
300
Trigger type
Natural
Wind exposure
Cross loaded slope
Avalanche size
3
Start zone aspect
S, SW
Vegetation cover
Open slope
Avalanche character
Persistent slab
Crust near weak layer
Yes
Number of avalanches
6-10
Weak layer burial date
2023-03-31
Avalanche observation
More than48hrs ago
Weak layer crystal type
Facets
Start zone elevation band
Alp, Tln
Avalanche occurrence datetime
2023-04-27T01:00:00.000Z