Mammoth Crest

Submission Info
Volunteer Observer
Wednesday, December 5, 2018 - 3:15pm
Red Flags: 
Recent loading by new snow, wind, or rain
Obvious avalanche path
Mammoth Crest 37° 34' 36.5916" N, 119° 0' 22.446" W
Snowpit Observations
More detailed information about the snowpack: 

Toured from Twin Lakes up Lake Mary Ridge to the TJ Bowl area. Trees still held snow on branches and noted settlement cones BTL and NTL. Winds were still or light throughout tour. Less wind affected snow near and above treeline than we expected. Easy travel in soft snow with ski penetration varying between 6" and 1 foot. Slope cuts on small, steep, windloaded features negative. Kick turn tests negative throughout. Dug many small hand pits with insignificant results with hand shears, and probed to find rightside up snowpack. HS 160cm ATL where we dug a small pit on our ascent. Test results included CTM Q3x2 down 6 inches or so within the recent storm snow. ATL in a sheltered colouir we noted a rimed snow surface which formed a slight skin that shed easily when skiing, but did not entrain much snow. Signs pointed toward this chute having been windloaded, but the wind affect was minimal and a slab was not noted while climbing. This chute which we skied had obviously slid, perhaps during the last round of heavy snow, but the debris was obscured by new snow and skied well. Boot penetration while climbing the upper portion of the chute was approx. thigh deep. Excellent skiing in the trees above Lake Mary, but many sizable logs lurk just beneath the snow surface.

Weather Observations
Blowing Snow: 
Cloud Cover: 
100% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Rose above the cloud bank at Mammoth Pack Station around 9 a.m., then in and out of clouds, blue sky and light snow throughout our tour.

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