Big Kahuna Avalanche

Quick report

mostynliam · Dec 15, 2024 · White Pass West

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Quick report

Weather
cloudy, windy
Ride Type
alpineSlopes, convexSlopes
Riding Quality
terrible
Snow Conditions
crusty, hard, windAffected

Snowpack

Obs Type
summary
Site Aspect
NE
Site Elevation
1780
Site Elevation Band
alp
Surface Conditions
crust, surfaceHoar, variable

Avalanche

Run Length
60
Slab Width
8
Trigger Type
skier
Wind Exposure
leeSlope
Avalanche Size
1.5
Slab Thickness
17
Trigger Sub Type
accidental
Start Zone Aspect
NE
Vegetation Cover
openSlope
Start Zone Incline
40
Avalanche Character
looseDry, windSlab
Crust Near Weak Layer
1
Number Of Avalanches
1
Start Zone Elevation
1500
Runout Zone Elevation
1440
Avalanche Observation
12hrsAgo
Start Zone Elevation Band
alp
Avalanche Occurrence Datetime
2024-12-15T22:20:00.000Z

Incident

Group Size
3
Terrain Trap
noTrap
Group Activity
skiing
Number Injured
0
Number Involved
1
Number Caught Only
1
Number Fully Buried
0
Snow Depth Trigger Point
variable
Terrain Shape Trigger Point
convex
Number Partly Buried Able Breathing
0
Number Partly Buried Impaired Breathing
0

Triggered a size 1.5 avalanche while skiing the big Kahuna at around 3pm. As the slope gets to its steepest a wind slab popped and a skier was caught and brought 50-60m through the chute and stopped on the open part of the slope ~20-30 meters below where the chute ends. The skier was not buried or injured and the 2 other group members behind reported a crown of ~15-20cm. The summit had high southwest wind which was depositing more snow than anticipated.