Fernie Factor

Avalanche

Run Length

2

Slab Width

3

Trigger Type

snowmobile

Avalanche Size

2

Slab Thickness

25

Trigger Sub Type

accidental

Start Zone Aspect

S, SW

Vegetation Cover

sparseTrees

Start Zone Incline

60

Avalanche Character

persistentSlab

Crust Near Weak Layer

1

Number Of Avalanches

1

Avalanche Observation

12to24hrsAgo

Weak Layer Crystal Type

depthHoar

Start Zone Elevation Band

tln

Avalanche Occurrence Datetime

2021-02-03T14:00:00

We were in a drainage and came across a previously triggered slab avalanche that had been triggered by a sled earlier in the day. Tracks I dictated that a snow machine had climbed the side of the drainage and likely broke the slab without even knowing. Although the amount of snow that had slid was size 1, it had potential to propagate more, cause a larger amount of snow to come down, and end up in the drainage (big terrain trap)