Fresh deep slab on Penrose
Location Name: Forecaster Observation- Flathead Range Observation date: Friday, February 21, 2020 - 18:15 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Thursday, February 20, 2020 - 15:30
Number of avalanches:
1
Avalanche Type:
Hard Slab
Failure Plane/Weak Layer:
Old snow
Trigger:
natural
Trigger Modifier:
Cornice Fall Triggered
Aspect:
Northeast
Starting Elevation:
above-treeline
Destructive Size:
D2.5
Relative Size:
unknown
Avalanche Location:
Date and Time of Avalanche:
Thursday, February 20, 2020 - 15:30
Number of avalanches:
1
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Unknown
More information or comments about the avalanche:
Viewed from Highway 2. Crown looked to be a few feet thick.
Trigger:
natural
Trigger Modifier:
Cornice Fall Triggered
Aspect:
Northeast
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:
Thursday, February 20, 2020 - 13:30
Number of avalanches:
2
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
Trigger:
natural
Aspect:
South
Starting Elevation:
near-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Avalanche Length (Vertical Run):
1500ft.
Avalanche Location:
Date and Time of Avalanche:
Thursday, February 20, 2020 - 13:30
Number of avalanches:
10
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
These likely ran 2/20. Maybe 2/19 though.
Trigger:
natural
Aspect:
South
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Avalanche Location:
Date and Time of Avalanche:
Friday, February 21, 2020 - 13:30
Number of avalanches:
4
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
SE aspects a bit more active today, perhaps because they were wetting for the first time, whereas south has been in the action now for a day or two.
Trigger:
natural
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Avalanche Location:
Date and Time of Avalanche:
Thursday, February 20, 2020 - 13:45
Number of avalanches:
2
Avalanche Type:
Cornice
Trigger:
natural
Aspect:
Northeast
Starting Elevation:
above-treeline
Destructive Size:
D1.5
Avalanche Location:
Crown observed from Hwy 2. Could only see the start zone. D size estimated with limited vantage.