Thar Bowl Small Avalanche

Incident

tom23p · Feb 8, 2020 · Coquihalla

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Observation photo 1

Quick report

Weather
sunny, windy
Ride Type
sunnySlopes, openTrees, alpineSlopes, mellowSlopes, steepSlopes
Riding Quality
good
Snow Conditions
windAffected, powder
Avalanche Conditions
avalancheConditionSlab

Weather

Avg Temp
-9
Wind Speed
windSpeedModerate
Blowing Snow
light
Sky Condition
fewClouds
Temperature Trend
rising
Precipitation Type
none

Snowpack

Obs Type
summary
Site Aspect
SE
Test Initiation
moderate
Cracking Observed
1
Site Elevation Band
alp, tln
Surface Conditions
newSnow, variable

Avalanche

Run Length
50
Slab Width
25
Trigger Type
skier
Wind Exposure
crossLoadedSlope
Avalanche Size
1
Slab Thickness
20
Trigger Sub Type
accidental
Start Zone Aspect
SE
Start Zone Incline
50
Avalanche Character
stormSlab
Crust Near Weak Layer
1
Number Of Avalanches
2-5
Start Zone Elevation
1850
Avalanche Observation
12to24hrsAgo
Weak Layer Crystal Type
stormSnow
Start Zone Elevation Band
alp
Avalanche Occurrence Datetime
2020-02-08T13:00:00

Incident

Group Size
3
Terrain Trap
trees
Group Activity
skiing
Number Injured
2
Number Involved
2
Number Caught Only
0
Number Fully Buried
0
Snow Depth Trigger Point
shallow
Terrain Shape Trigger Point
planar
Number Partly Buried Able Breathing
0

Triggered a small (size 1) on a steep (50 ish) SE aspect just above TL. 20cm has of storm/wind slab on rain crust. 2 skiers caught, slid 10m, one partial (Knee height) burial. Slab was not very dense but did propagate above trigger point and 25m wide. Lots of evidence further down of similar slides, mostly on steeper terrain and same aspect all the way through tree line.