Mores Creek Summit Observations

Location Name: 
Below Round the World Bowl
Region: 
Mores Creek Summit
Date and time of observation: 
Mon, 01/18/2016 - 12:00
Location Map: 
United States
43° 56' 50.6832" N, 115° 40' 28.632" W
US


Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Recent loading by new snow, wind, or rain

Observation made by: Public
Snowpit Observations
More detailed information about the snowpack: 

Triggering and propagation evidence seen without slip on E and SE aspects just above 7000'.  A significant wumph event triggered high on a SE aspect, 28 degree slope, but with no resulting slide.  Tests and profiles indicate that a thick weak layer starts about 25cm deep in the snow pack, underlying 8-10cm of recent new snow and a 15cm slab.  Slab hardness seems to change based on distance below (softer slab further below) an exposed ridgeline with possible wind deposition.   CT and ECT indicate this layer is easily triggered, little propagation, and no slip.  Similar aspects (E and SE) with steeper slope angle should be approached with extreme caution.  South, East, and West slopes are seeing a lot of sun, making for some heavy snow turns and will be making for crusty morning conditions, softening into afternoon, at least until new snow arrives mid week.

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

Pit at marked location (SE aspect) as well as slightly higher on the ridge (E aspect) in an area with higher likelihood of wind loading.  In both case a very thick weak layer existed about 25 centimeters below the snow surface.  Weak layer was greater than 15 cm thick.  Pack above this weak layer consisted of the most recent new snow (8-10cm) and a soft slab (15cm thick).  A compression test failed the weak layer (with no slip) in one of the pits (E, 30 degrees) on isolation, and CT6, but no slip in the lower pit (SE, 28 degrees).  On the east aspect an ECT12 with no propation was seen.  Pulling the failed column and extended column resulted in a Q2 shear.  There are other layers lower in the snowpack (60cm and 1m), but these layers were non reactive.

Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
Accumulation rate: 
None
More detailed information about the weather: 

Warm sunny day.  Temperature at the Mores Creek Summit parking area was slightly above freezing.  Temps at 7400 foot elevation hovered around freezing.