whumpfing on jughandle

Location Name: 
Lady bug
Region: 
Boulder/Jughandle Area
Date and time of observation: 
Sat, 12/14/2019 - 13:40
Location Map: 
United States
44° 49' 47.5896" N, 115° 57' 53.6004" W
US


Red Flags: 
Whumphing noises, shooting cracks, or collapsing

Observation made by: Public
Any other comments about the observation or links to outside pages that have more info on the observation: 

Toured up Jughandle in thin early season conditions.  Had several collapses and whumpfs in the lower meadows.  We dug a pit to find the layer of concern on a NW aspect mid slope.  An inch of weak facets sitting on top of an ice crust (old october snow) buried underneath 20 inches of the snow since thanksgiving.  We had this layer fail during isolation during our tests and showed the ability to propagate. 

We stayed out of avalanche terrain and made note of the wind slabs developing near the ridge.  Overall depth of snowpack was 75 cms on the western aspect, but was relatively supportive.  Lots of stumps, rocks, and logs still lurking to underneath the surface.  We looked at the eastern side, but visibility was poor and we were spooked of steeper terrain. 

The snowpack structure will have us making conservative calls and staying out of any avalanche terrain and has us very concerned for when it does snow more.  

Weather Observations
Blowing Snow: 
Yes
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
None
Wind Direction: 
Northwest
More detailed information about the weather: 

Some small sun breaks, but snow surface was not affected.