Avalanche observations northern whitefish
Location Name: Forecaster Observation: Northern Whitefish Observation date: Sunday, December 15, 2019 - 13:00 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Tabs
Avalanche Details:
Date and Time of Avalanche:
Friday, December 13, 2019 - 12:00
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
unknown
Aspect:
Northwest
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Width (Average width):
150ft.
Avalanche Location:
Date and Time of Avalanche:
Friday, December 13, 2019 - 12:00
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
unknown
Aspect:
Northwest
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Width (Average width):
100ft.
Avalanche Location:
Date and Time of Avalanche:
Friday, December 13, 2019 - 12:00
Number of avalanches:
1
Avalanche Type:
Hard Slab
Failure Plane/Weak Layer:
Old snow
More information or comments about the avalanche:
This was the one candidate to be a possible persistent slab avalanche. It appeared to be deeper than the rest and have some rock in the upper part of the bed surface (lookers left in the photo with numerous crowns).
Trigger:
unknown
Aspect:
Northwest
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Width (Average width):
200ft.
Avalanche Location:
Date and Time of Avalanche:
Friday, December 13, 2019 - 12:00
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
More information or comments about the avalanche:
This avalanche appeared to be the widest that we observed. Photo with the single crown line.
Trigger:
unknown
Aspect:
North
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R3 Medium
Avalanche Width (Average width):
300ft.
Avalanche Location:
Poor visibility made it difficult to gather detailed information.