Blower but not quite ripe.
Location Name: Northern Swan Range Observation date: Monday, February 8, 2021 - 17:45 |
Is this an Avalanche Observation: Yes |
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Observation made by: Professional Observer
Tabs
Avalanche Details:
Date and Time of Avalanche:
Friday, February 5, 2021 - 12:15
Number of avalanches:
1
Avalanche Type:
Hard Slab
Failure Plane/Weak Layer:
Other - explain below
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
Northwest
Starting Elevation:
near-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Crown Height:
2 ft
Avalanche Width (Average width):
300ft.
Avalanche Location:
The crown had obviously been filled in with recent snow, so the crown depth is a guess. We could not see the runout and couldn't tell how far the slide ran. Assume this was a Persistent Slab that failed on buried surface hoar or facets. Despite what it looks like it on the map, it really is a WNW aspect. We feel there were many other slides in the neighborhood, but they had been erased by snow and wind. Assorted debris piles here and there.