Checkout before the storm in Lost Johnny
Location Name: Lost Johnny Observation date: Monday, January 11, 2021 - 15:15 |
Is this an Avalanche Observation: No |
---|
Observation made by: Professional Observer
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Wednesday, January 6, 2021 - 12:30
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
natural
Trigger Modifier:
Cornice Fall Triggered
Start Zone Slope Angle:
35
Aspect:
East
Starting Elevation:
above-treeline
Destructive Size:
D1.5
Relative Size:
R2 Small
Crown Height:
1 ft
Avalanche Length (Vertical Run):
150ft.
Avalanche Width (Average width):
100ft.
Number of people caught:
0
Number of partial burials:
0
Number of full burials:
0
Avalanche Location:
Date and Time of Avalanche:
Wednesday, January 6, 2021 - 12:30
Number of avalanches:
1
Avalanche Type:
Hard Slab
Failure Plane/Weak Layer:
Old snow
More information or comments about the avalanche:
Triggered by a wind slab avalanche.
Trigger:
natural
Start Zone Slope Angle:
35
Aspect:
East
Starting Elevation:
above-treeline
Destructive Size:
D2.5
Relative Size:
R2 Small
Crown Height:
3 ft
Avalanche Length (Vertical Run):
300ft.
Avalanche Width (Average width):
100ft.
Avalanche Location:
Date and Time of Avalanche:
Wednesday, January 6, 2021 - 12:30
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
More information or comments about the avalanche:
Crown depth is difficult to determine
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:
R2 Small
Crown Height:
1 ft
Avalanche Length (Vertical Run):
300ft.
Avalanche Width (Average width):
200ft.
Avalanche Location:
Wind slab that failed with a cornice fall, and stepped down to a PWL (Dec 22 crust?)