Persistent weak layers are still... persisting

Location Name: 
Hellroaring Peak, below Taylor Creek Road
Observation date: 
Sunday, February 28, 2021 - 10:45

Is this an Avalanche Observation: 
No
Observation made by: Public

Tabs

Quick Observation

 

For the final day of the TPF Level 2 class, we stuck to low-angle terrain off Hellroaring Peak and dug a pit below Taylor Creek Road on a 26-degree, western-facing slope at about 6170 ft.

Interestingly, we saw our only propagation in our ECT of the whole course (ECTP30 right above the 1/13 crust). It was at a bit lower of an elevation, so that may have played a role.
 

But it goes to show that we're dealing with an unpredictable persistent weak layer. When it breaks, it will probably result in large and unsurvivable avalanches.

Travel Details
Region: 
Whitefish Range - Southern (south of Coal Creek)
Activity: 
Skiing
Snowpack Details
Snowpack and Weather Details: 
Hide Terrain
Elevation of observation: 
5000-6500 ft
Aspect(s) of observation: 
W
Red Flags: 
Shooting cracks
Persistent Weak Layers: 
Surface Hoar
Facets or Faceted Crust
Depth Hoar
Buried
New Snow in the past 24 hours: 
4.00in.
Total Snow Depth: 
210 cm
More comments about the snowpack and weather: 
ECTPX (6-7 cm above 1/13 crust) at 95 cm below surface PST 40/100 (END) at 95 cm below surface
Blowing Snow: 
Light
Wind Speed: 
Light (Twigs in motion)
Sky Cover: 
Obscured by fog, etc (X)
Highest Precipitation Rate: 
Very Light Snowfall (S-1)