Stepping Out In The Sunshine
Location Name: Forecaster Observation: Norther Whitefish Range Observation date: Monday, February 10, 2020 - 18:15 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Tabs
Avalanche Details:
Date and Time of Avalanche:
Saturday, February 8, 2020 - 11:00
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Unknown
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
Northwest
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Length (Vertical Run):
1500ft.
Avalanche Width (Average width):
50ft.
Avalanche Location:
Date and Time of Avalanche:
Monday, February 10, 2020 - 12:00
Number of avalanches:
12
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
New/old snow interface
More information or comments about the avalanche:
Solar trigger
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
Southeast
Starting Elevation:
above-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Crown Height:
Less than 1 ft
Avalanche Length (Vertical Run):
25ft.
Avalanche Width (Average width):
15ft.
Avalanche Location:
Date and Time of Avalanche:
Monday, February 10, 2020 - 11:30
Number of avalanches:
5
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
natural
Start Zone Slope Angle:
45
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):
25ft.
Avalanche Width (Average width):
10ft.
Avalanche Location:
Date and Time of Avalanche:
Monday, February 10, 2020 - 14:30
Number of avalanches:
10
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
Cornice drops onto previously wind loaded slopes resulted in only small sluffs.
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Start Zone Slope Angle:
45
Aspect:
Northeast
Starting Elevation:
above-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):
25ft.
Avalanche Location:
Blocky debris crashed onto the lake. Crown no longer visible.