Avalanches on Nyack
Location Name: Forecaster Observation - Flathead Range Observation date: Tuesday, March 23, 2021 - 21:00 |
Is this an Avalanche Observation: Yes |
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Observation made by: Forecaster
Location
Tabs
Avalanche Details:
Date and Time of Avalanche:
Tuesday, March 23, 2021 - 10:00
Number of avalanches:
10
Avalanche Type:
Wet Loose
Failure Plane/Weak Layer:
Within storm snow
Trigger:
natural
Start Zone Slope Angle:
35
Aspect:
Southeast
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Avalanche Length (Vertical Run):
150ft.
Avalanche Width (Average width):
25ft.
Avalanche Location:
Date and Time of Avalanche:
Monday, March 22, 2021 - 22:00
Number of avalanches:
5
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
These appeared to have run during the storm.
Trigger:
natural
Start Zone Slope Angle:
40
Aspect:
North
Starting Elevation:
near-treeline
Destructive Size:
D1 Relatively harmless to people.
Relative Size:
R1 Very Small
Avalanche Length (Vertical Run):
100ft.
Avalanche Width (Average width):
20ft.
Avalanche Location:
Date and Time of Avalanche:
Tuesday, March 23, 2021 - 16:00
Number of avalanches:
6
Avalanche Type:
Loose Dry/ Sluff
Failure Plane/Weak Layer:
Within storm snow
More information or comments about the avalanche:
It was impossible not to trigger sluffs on steep northerly slopes we traveled. None of these appeared to slide on or step down to the crust.
Trigger:
skier
Trigger Modifier:
Intentionally Triggered
Start Zone Slope Angle:
40
Aspect:
Northeast
Starting Elevation:
near-treeline
Destructive Size:
D1.5
Relative Size:
R1 Very Small
Avalanche Length (Vertical Run):
300ft.
Avalanche Width (Average width):
20ft.
Avalanche Location:
These occurred early in the day from solar input.