Glidden Ridge Remote Trigger

Location Name: 
Glidden Ridge Remote Trigger
Region: 
Silver Valley Area
Date and time of avalanche (best estimate if unknown): 
Thu, 02/04/2021 - 10:30
Location Map: 
United States
47° 32' 4.1856" N, 115° 42' 11.1996" W
US


Red Flags: 
Recent avalanche activity
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain
Obvious avalanche path
Terrain Trap

Observation made by: Forecaster
Avalanche Observations
Avalanche Type: 
Slab
Slope: 
35degrees
Trigger type: 
Skier
Crown Height: 
1 ft
Aspect: 
North
Weak Layer: 
Old Snow
Avalanche Width: 
200ft.
Terrain: 
Near Treeline
Elevation: 
6 200ft.
Bed Surface: 
Old Snow
Number of people caught: 
0
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

We were touring up the low angle slope to the south and just about to crest the ridge top (still in large, well spaced timber) and felt a whumph.  Saw a shooting crach and a small hemlock about a 100 yds away lost the snow that was holding the top under the surface. We toured further and had a view of the the gully that slid.  The crown started from the tree bomb and wrapped around the gully, approzimately 200ft across and a crown between 1-2 ft deep.  In the center of the gully there was still about 100' of hangfire above the main crown.  We couldn't see to the bottom of the slope to know how far it ran, our visual was only 300' or so, which was still bed surface. 

Avalanche Photos: 
Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Moderate
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
Southwest
Accumulation rate: 
Less than 1 in. per hour