Black Mountain

Black Mountain
Submission Info
Thursday, December 7, 2017 - 3:15pm
Red Flags: 
Obvious avalanche path
Black Mtn 38° 2' 40.92" N, 119° 16' 30" W
Snowpit Observations
More detailed information about the snowpack: 

A noticeable warm-up over the past few days. Solar aspects: the surface snow is warming and getting moist, a light melt / freeze crust forms as they cool. Some areas showing a visible retreat given the mild daily highs and clear skies. Shaded aspects: temperature gradient has eased quite a bit slowing facet growth but facets remain in the upper pack, especially where the snow is soft. This may become an issue once buried by windslabs or subsequent snowfall. Windslabs are widely distributed with the potential for triggering on steeper terrain where slabs overlay loose facets. Stability Tests: Compression tests yielded no results. Open water at most lake outlets. Lake ice becoming more exposed as snow is blown off. Snow surface varies between patches of soft facets in shelter locations and gullies, sastrugi, windslabs, wind scour, and melt / freeze crusts. Snow coverage is fair to good from 9500’ to 10,500’ where sheltered. Where exposed variable and patchy, especially in wind prone areas. A refill would be nice. Crank up the AR machine. 

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
More detailed information about the weather: 

Mild daily temperatures with coolish nights. 

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