TJ Bowl

SNOWPACK OBSERVATION
Tour From Old Mammoth Road to TJ Bowl
Submission Info
Volunteer Observer
Thursday, December 22, 2016 - 3:45pm
Red Flags: 
Obvious avalanche path
TJ Bowl 37° 34' 51.5352" N, 119° 0' 28.1232" W
Snowpit Observations
More detailed information about the snowpack: 

Observed widespread surface hoar (2-3 mm) along Old Mammoth Road (mid-sherwins elevation) and Lake Mary Road en route to Lake Mary. See photos of large surface hoar on Lake Mary itself (some upwards of 1"). Surface hoar noted in trees on Lake Mary Ridge to about 9200'. At treeline beneath TJ Bowl we found 125cm HS in sheltered areas with the old ice crust @ 100cm found by probing. Variable ski penetration near and above treeline depending on previous wind effect (5cm to shin deep). Probing revealed a rightside up snowpack with the exception of shallow windslabs/wind board above treeline. At approx. 10700' we found shallow wind slab on top of an otherwise rightside up snowpack with a HS of 240cm. CTN. No cracking or whumphing while skinning up. Kick turn tests did not shear off any of this wind layer. At approx 10800' beneath the rocks we found 75cm wind deposited snow on old ice layer at this location. This was in an area that had slid during the last storm...old crown visible beneath rocks and much old debris on bench above the lower portion of TJ Bowl. Ice layer visible around rocks throughout TJ Bowl area. Evidence of widespread natural avalanche activity during last storm throughout the area as well. Much old debris in gullies and on benches. Old crowns still visible beneath rocks from Ships Prow past TJ Bowl. Snow surface was a mixed bag of supportable and breakable windboard and textured powder. Near surface faceting evident everywhere there was soft snow. SW winds increased (Light) above treeline while we were out, but no visible snow transport at ridgetop at that time. Variable skiing conditions in upper bowl and all the way to TJ Lake. We found more widespread surface hoar in the afternoon in the TJ Lake area and near Lake Mary (2-4mm). See photos. 

Snowpack photos: 
Weather Observations
Cloud Cover: 
Clear
Air temperature: 
Below Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
None
More detailed information about the weather: 

Cold temperatures in Old Mammoth this morning. 17 F at 0730. Increasing SW winds above treeline while we travelled in and around TJ Bowl. Sunny aspects were getting cooked with some surface snow melting and some sun crusts. 

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