Wind slab hunters
Location Name: Forecaster Observation - Flathead Range Observation date: Wednesday, February 12, 2020 - 15:45 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Wednesday, February 12, 2020 - 12:15
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D1.5
Relative Size:
R3 Medium
Crown Height:
1 ft
Avalanche Length (Vertical Run):
10ft.
Avalanche Width (Average width):
20ft.
Avalanche Location:
Date and Time of Avalanche:
Wednesday, February 12, 2020 - 13:30
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
6" fist+ hard slab, likely formed from northerly winds last night.
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Aspect:
South
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Crown Height:
Less than 1 ft
Avalanche Length (Vertical Run):
200ft.
Avalanche Width (Average width):
20ft.
Avalanche Location:
Date and Time of Avalanche:
Tuesday, February 11, 2020 - 13:30
Number of avalanches:
1
Avalanche Type:
Soft Slab
More information or comments about the avalanche:
Natural likely ran yesterday. Could only see the debris, but likely a wind slab
Trigger:
natural
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D1.5
Relative Size:
R1 Very Small
Avalanche Location:
Date and Time of Avalanche:
Wednesday, February 12, 2020 - 13:30
Number of avalanches:
3
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
A few harmless sluffs triggered by brief periods of solar today.
Trigger:
natural
Aspect:
South
Starting Elevation:
below-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Crown Height:
Less than 1 ft
Avalanche Length (Vertical Run):
80ft.
Avalanche Location:
Small test slope result