Gale force winds and sensitive wind slabs

Location Name: 
South Dickey
Observation date: 
Saturday, March 12, 2022 - 20:15

Is this an Avalanche Observation: 
Yes
Observation made by: Public

Location

Tabs

Quick Observation

Traveled from 4800'-7200' on mainly N-NW terrain. Wind was swirling in lower elevation basin with stiffer wind slabs developing. Some audible collapses were heard on lower angle slopes with no visible collapses. Wind at north facing saddle around 7k was absolutely ripping. Gusts into the 60's easily.  
 

Descended steep north facing terrain from 7200' to 5600'. Upper ridgelines were loaded and fat. Skiing was generally spectacular but skier triggered storm slab around 6k' on hard underlying crust. Crown was approx 10-12", and slab entrained impressive amount of storm snow and ran to valley floor around 5400' with highly visible powder cloud. Several other slabs were intentionally triggered on the remainder of the descent. 
 

Multiple other large to very slab avalanches were observed in upper elevation aspects. Seemed to be mainly easterly terrain.  See pictures!

Lower elevation solar aspects were becoming warm and stickey....

Snowpack, Avalanche, Weather Images: 
Travel Details
Region: 
Flathead Range - Middle Fork Corridor
Activity: 
Skiing
Avalanche Details
Avalanche Details: 
Date and Time of Avalanche: 
Saturday, March 12, 2022 - 14:30
Number of avalanches: 
1
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 
Hide Trigger
Trigger: 
skier
Trigger Modifier: 
Accidentally Triggered
Hide Terrain
Start Zone Slope Angle: 
40
Aspect: 
North
Starting Elevation: 
6000'
Hide Size
Destructive Size: 
D2 Could bury, injure, or kill a person.
Relative Size: 
R2 Small
Crown Height: 
1 ft
Avalanche Length (Vertical Run): 
600ft.
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, March 12, 2022 - 14:30
Number of avalanches: 
2
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 
Hide Trigger
Trigger: 
skier
Trigger Modifier: 
Intentionally Triggered
Hide Terrain
Start Zone Slope Angle: 
40
Aspect: 
North
Starting Elevation: 
near-treeline
Hide Size
Destructive Size: 
D1.5
Relative Size: 
R1 Very Small
Crown Height: 
1 ft
Avalanche Length (Vertical Run): 
200ft.
Avalanche Location: 
Date and Time of Avalanche: 
Saturday, March 12, 2022 - 08:30
Number of avalanches: 
3
Avalanche Type: 
Soft Slab
Failure Plane/Weak Layer: 
New/old snow interface
More information or comments about the avalanche: 
Hide Trigger
Trigger: 
natural
Hide Terrain
Start Zone Slope Angle: 
40
Aspect: 
East
Starting Elevation: 
above-treeline
Hide Size
Destructive Size: 
D2.5
Relative Size: 
R3 Medium
Crown Height: 
1 ft
Avalanche Length (Vertical Run): 
1000ft.
Avalanche Width (Average width): 
200ft.
Avalanche Location: