Sound the alarms, avalanche activity escalating in Flathead Range
Location Name: Forecaster Observation - Crystal Creek, Flathead Range Observation date: Monday, December 18, 2017 - 17:15 |
Is this an Avalanche Observation: No |
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Observation made by: Forecaster
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Monday, December 18, 2017 - 14:00
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Old snow
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Aspect:
Northeast
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Crown Height:
1 ft
Avalanche Length (Vertical Run):
50ft.
Avalanche Width (Average width):
100ft.
Number of people caught:
0
Number of partial burials:
0
Number of full burials:
0
Avalanche Location:
Date and Time of Avalanche:
Monday, December 18, 2017 - 05:30
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Old snow
Trigger:
natural
Aspect:
North
Starting Elevation:
below-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Crown Height:
1 ft
Avalanche Location:
Date and Time of Avalanche:
Monday, December 18, 2017 - 18:45
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
Old snow
Trigger:
natural
Aspect:
Northeast
Starting Elevation:
near-treeline
Destructive Size:
D2 Could bury, injure, or kill a person.
Relative Size:
R2 Small
Crown Height:
1 ft
Avalanche Length (Vertical Run):
1000ft.
Avalanche Width (Average width):
300ft.
Avalanche Location:
Also a few similar avalanches on southerly aspects across the valley.