Multiple sz 2.5-3 Avalanches Blackcomb Glacier

Map for Mountain Information Network report: Multiple sz 2.5-3 Avalanches Blackcomb Glacier

Information

Avalanche date/time
Thursday, April 27, 2023 at 01:00
Estimated occurrence time of avalanche
More than 48 hours ago
Number of avalanches in this report
6 to 10
The size of avalanche
3
Run length
300m
Avalanche Character
  • Persistent slab
Trigger type
Natural
Start zone aspect
  • S
  • SW
Start zone elevation band
  • Alpine
  • Treeline
Weak layer burial date
Friday, March 31, 2023
Weak layer crystal type
  • Facets
Crust near weak layer
Yes
Wind exposure
Cross-loaded slope
Vegetation cover
Open slope

Comments

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.