Howling wind
Location Name: Forecaster Observation - Flathead Range Observation date: Wednesday, December 22, 2021 - 19:15 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Tabs
Avalanche Details:
Date and Time of Avalanche:
Wednesday, December 22, 2021 - 12:00
Number of avalanches:
5
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Start Zone Slope Angle:
35
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Crown Height:
1 ft
Avalanche Length (Vertical Run):
100ft.
Avalanche Width (Average width):
50ft.
Avalanche Location:
Date and Time of Avalanche:
Wednesday, December 22, 2021 - 12:00
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
Northeast
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R3 Medium
Crown Height:
2 ft
Avalanche Length (Vertical Run):
1000ft.
Avalanche Width (Average width):
500ft.
Avalanche Location:
Two avalanches were remotely triggered while approaching ridgelines from further back. Others were with small cornice triggers. All slopes we triggered were small test slopes. We never approached any larger terrain.