Avalanchy in the Middle Fork
Location Name: Forecaster Observation - Flathead Range Observation date: Sunday, April 19, 2020 - 12:30 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Sunday, April 19, 2020 - 11:00
Number of avalanches:
2
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Aspect:
Northwest
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Location:
Date and Time of Avalanche:
Saturday, April 18, 2020 - 16:30
Number of avalanches:
4
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
More information or comments about the avalanche:
One crown visible, other start zones obscured by clouds but assuming same wind slab issue based on characteristics of slides.
Trigger:
natural
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Crown Height:
Less than 1 ft
Avalanche Location:
Date and Time of Avalanche:
Saturday, April 18, 2020 - 13:30
Number of avalanches:
10
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
Mostly D1-D1.5. A few D2s. Various aspects. Dry sluffs that entrained some moist snow near runouts.
Trigger:
natural
Starting Elevation:
above-treeline
Destructive Size:
D1.5
Avalanche Location:
Date and Time of Avalanche:
Thursday, April 9, 2020 - 15:30
Number of avalanches:
3
Avalanche Type:
Wet Slab
Failure Plane/Weak Layer:
Old snow
More information or comments about the avalanche:
Several D2.5 to D3. The debris looked wet. Slabs could have been wet or wetting.
Trigger:
natural
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D3 - Could destroy a car, a wood house, or snap trees
Relative Size:
R3 Medium
Crown Height:
3 ft
Avalanche Location: