Snowpit and observations from Lincoln Ridge

Location Name: 
Lincoln Ridge
Region: 
Yuba Pass Area
Date and time of observation: 
Sun, 02/19/2012 - 12:30
Location Map: 
United States
39° 35' 37.176" N, 120° 29' 35.016" W
See map: Google Maps
US


Red Flags: 
Whumphing noises, shooting cracks, or collapsing
Observation made by: Forecaster
Snowpit Observations
More detailed information about the snowpack: 

Collapsing of the upper facet/crust layer was highly localized an inconsistent on NW-N-NE aspects in the area. Weak layer propagation tests at the snowpit indicated that propagation was unlikely. Minor cracking associated with collapse of the weak layer was noted around 100' east of the pit location along the ridgetop. An isolated whumph occurred just to the north and down slope of the pit location at around 7,200'. A quick test pit at this location revealed ECTP-21 on the crust/facet layer. A number of ski and snowmobile cuts on NW-N-NE aspect 32 to 42 degree slopes in the area did not produce any observable snowpack failure.

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Below Freezing
Wind Speed: 
Calm
Precipitation: 
Air temperature trend: 
Warming
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: