Tour de Tunnel
Location Name: Forecaster Observation - Tunnel Ridge, Flathead Range Observation date: Saturday, March 10, 2018 - 13:00 |
Is this an Avalanche Observation: Yes |
---|
Observation made by: Forecaster
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Friday, March 9, 2018 - 19:15
Avalanche Type:
Soft Slab
Failure Plane/Weak Layer:
New/old snow interface
Trigger:
natural
Aspect:
East
Starting Elevation:
above-treeline
Destructive Size:
D2.5
Relative Size:
R3 Medium
Avalanche Length (Vertical Run):
3000ft.
Avalanche Width (Average width):
500ft.
Number of people caught:
0
Avalanche Location:
Date and Time of Avalanche:
Saturday, March 10, 2018 - 15:00
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
Numerous WL avalanches on west to east aspects, but the majority were confined to south aspects.
Trigger:
natural
Aspect:
South
Starting Elevation:
above-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R2 Small
Avalanche Length (Vertical Run):
500ft.
Number of people caught:
0
Spoke with a group camping in Tunnel Creek. Their camp was located approx. 1500' from the toe of the debris associated with a large, natural wind slab. They said they heard the avalanche and felt the powder blast at their camp. Said the avalanche happen at approx. 7:15 pm on 3/9/2018. They hadn't noticed any evidence of natural activity when they skinned in on Friday during the day but woke this morning to find numerous crown lines on upper elevation, leeward slopes.