Dirty diapers
Location Name: Forecaster Observation - Flathead Range Observation date: Friday, March 22, 2019 - 17:30 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Tabs
Avalanche Details:
Date and Time of Avalanche:
Thursday, March 21, 2019 - 14:30
Avalanche Type:
Wet Slab
Failure Plane/Weak Layer:
Old snow
Trigger:
natural
Aspect:
Southeast
Starting Elevation:
above-treeline
Destructive Size:
D4 - Could destroy a rail car, large truck, buildings, or swaths of forest
Relative Size:
R4 Large
Crown Height:
3 ft
Avalanche Length (Vertical Run):
2800ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, March 21, 2019 - 15:00
Avalanche Type:
Unknown
Failure Plane/Weak Layer:
Old snow
More information or comments about the avalanche:
Could not see start zone. Either a wet loose or wet slab from N/ATL. Debris pile was a day or two old.
Trigger:
natural
Aspect:
Southeast
Starting Elevation:
above-treeline
Destructive Size:
D3.5
Relative Size:
R3 Medium
Avalanche Length (Vertical Run):
2700ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, March 21, 2019 - 15:00
Avalanche Type:
Wet Slab
Failure Plane/Weak Layer:
Old snow
More information or comments about the avalanche:
Mix of WL and WS in start zone, breaking on 2/2 crust or down to ground.
Trigger:
natural
Aspect:
South
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 Length (Vertical Run):
2400ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, March 21, 2019 - 15:00
Avalanche Type:
Wet Slab
Failure Plane/Weak Layer:
Old snow
Trigger:
natural
Aspect:
South
Starting Elevation:
near-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Crown Height:
3 ft
Avalanche Length (Vertical Run):
500ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, March 21, 2019 - 11:00
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
Moist loose on E/NE aspects. One triggered a 1' soft dryish slab.
Trigger:
natural
Aspect:
East
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:
Friday, March 15, 2019 - 13:15
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
Trigger:
skier
Aspect:
East
Starting Elevation:
above-treeline
Destructive Size:
D1.5
Relative Size:
R1 Very Small
Crown Height:
Less than 1 ft
Avalanche Location:
Date and Time of Avalanche:
Thursday, March 21, 2019 - 13:15
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Ground
More information or comments about the avalanche:
Various slides to the ground in Glacier Park on sunny aspects, mostly starting around 6-6.5k', running full track. Viewed from afar.
Trigger:
natural
Destructive Size:
D3 - Could destroy a car, a wood house, or snap trees
Relative Size:
R3 Medium
Avalanche Location:
Date and Time of Avalanche:
Friday, March 22, 2019 - 15:15
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Ground
More information or comments about the avalanche:
New slide off of Stanton, either ran today or yesterday late afternoon. Looks like it probably started as a WL and pulled in some WS.
Trigger:
natural
Aspect:
Southwest
Starting Elevation:
above-treeline
Destructive Size:
D3.5
Relative Size:
R3 Medium
Avalanche Length (Vertical Run):
3400ft.
Avalanche Location:
Date and Time of Avalanche:
Friday, March 22, 2019 - 15:15
Avalanche Type:
Wet Slab
Failure Plane/Weak Layer:
Old snow
More information or comments about the avalanche:
Estimated from afar. Crown and debris looked fresh.
Trigger:
natural
Aspect:
West
Starting Elevation:
near-treeline
Destructive Size:
D3 - Could destroy a car, a wood house, or snap trees
Relative Size:
R4 Large
Crown Height:
4 ft
Avalanche Location:
Date and Time of Avalanche:
Friday, March 22, 2019 - 15:00
Avalanche Type:
Wet Slab
Failure Plane/Weak Layer:
Ground
More information or comments about the avalanche:
Acros the Middle Fork River
Trigger:
natural
Aspect:
West
Starting Elevation:
near-treeline
Destructive Size:
D3 - Could destroy a car, a wood house, or snap trees
Relative Size:
R3 Medium
Date and Time of Avalanche:
Thursday, March 21, 2019 - 17:00
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Ground
More information or comments about the avalanche:
Trigger:
natural
Aspect:
South
Starting Elevation:
above-treeline
Destructive Size:
D3 - Could destroy a car, a wood house, or snap trees
Relative Size:
R3 Medium
Date and Time of Avalanche:
Thursday, March 21, 2019 - 14:00
Avalanche Type:
Wet Loose
More information or comments about the avalanche:
Trigger:
natural
Starting Elevation:
above-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Viewed from debris pile at valley bottom. Start zone mostly obscured by terrain. Could make out a ~3' crown at about 6000', probably triggered by a wet loose from higher up. Snapped mature trees. Towers of wet debris 20' tall.