Naturals, remote triggers, and forecasters tackled by wind slabs, Oh My!
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      Location Name:  Forecaster Observation - Flathead Range Observation date:  Saturday, February 8, 2020 - 19:30  | 
   
        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: 
3
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
Unknown
Trigger: 
natural
Aspect: 
Northeast
Starting Elevation: 
above-treeline
Destructive Size: 
D2 Could bury, injure, or kill a person.
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, February 8, 2020 - 13:30
Number of avalanches: 
3
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 
Wind slabs triggered by cornice drops, ski cuts, etc. One was remotely triggered. These all failed on small NSF a few inches above the 2/1 crust.
Trigger: 
skier
Trigger Modifier: 
Intentionally Triggered
Aspect: 
East
Starting Elevation: 
near-treeline
Destructive Size: 
D1.5
Relative Size: 
R2 Small
Crown Height: 
1 ft
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, February 8, 2020 - 14:30
Number of avalanches: 
1
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 
Failed on NSF above 2/1 crust.
Trigger: 
skier
Trigger Modifier: 
Cornice Fall Triggered
Aspect: 
East
Starting Elevation: 
near-treeline
Destructive Size: 
D2 Could bury, injure, or kill a person.
Relative Size: 
R2 Small
Avalanche Length (Vertical Run): 
800ft.
Avalanche Width (Average width): 
1ft.
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, February 8, 2020 - 13:00
Number of avalanches: 
5
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
Within storm snow
More information or comments about the avalanche: 
A handful of D1 to 1.5's ran during period of increased wind speeds mid day.
Trigger: 
natural
Starting Elevation: 
near-treeline
Destructive Size: 
D1.5
Relative Size: 
R1 Very Small
Crown Height: 
Less than 1 ft
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, February 8, 2020 - 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: 
Small rollover, while ascending. Slab broke higher than expected and carried me a few yards.
Trigger: 
skier
Trigger Modifier: 
Accidentally Triggered
Starting Elevation: 
near-treeline
Destructive Size: 
D1 Relatively harmless to people.
Relative Size: 
R1 Very Small
Crown Height: 
1 ft
Avalanche Length (Vertical Run): 
15ft.
Avalanche Width (Average width): 
20ft.
Number of people caught: 
1
Number of partial burials: 
0
Number of full burials: 
0
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, February 8, 2020 - 14:30
Number of avalanches: 
5
Avalanche Type: 
Loose Dry/ Sluff
Failure Plane/Weak Layer: 
Within storm snow
More information or comments about the avalanche: 
Sluffing in steep, wind protected terrain at mid and low elevations.
Trigger: 
skier
Starting Elevation: 
near-treeline
Destructive Size: 
D1 Relatively harmless to people.
Relative Size: 
R1 Very Small
Avalanche Location: 










Observed from a distance, on Nyack