The avalanches had a good day
Location Name: Flathead Range Observation date: Thursday, April 9, 2020 - 19:15 |
Is this an Avalanche Observation: Yes |
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Observation made by: Public
Tabs
Avalanche Details:
Date and Time of Avalanche:
Thursday, April 9, 2020 - 12:15
Number of avalanches:
3
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Other - explain below
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
Southeast
Starting Elevation:
6700'
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Crown Height:
2 ft
Avalanche Length (Vertical Run):
2000ft.
Avalanche Width (Average width):
75ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, April 9, 2020 - 12:00
Number of avalanches:
10
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
At least 5 D2 wet loose slides on the south-facing slopes above Great Bear Creek as of 2:00.
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Length (Vertical Run):
2000ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, April 9, 2020 - 12:15
Number of avalanches:
10
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
We had a limited view of other south-facing terrains in this valley besides the slopes on this face. 1 D2 and the rest 1.5.
Trigger:
natural
Start Zone Slope Angle:
35
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Length (Vertical Run):
1500ft.
Avalanche Width (Average width):
100ft.
Avalanche Location:
Date and Time of Avalanche:
Sunday, April 5, 2020 - 00:15
Number of avalanches:
4
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
One of these may have been triggered by a cornice fall. The date is a rough estimate.
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
North
Starting Elevation:
7100
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Crown Height:
2 ft
Avalanche Length (Vertical Run):
800ft.
Avalanche Width (Average width):
100ft.
Avalanche Location:
I watched 2 of the 3 run at 12:30 -1:00. One of these released 300' above a recent slab in the same gulley.