Lower elevation snowpack 01/30/2012

Date: 
01/30/2012
Title: 
Lower elevation snowpack
Observer Name: 
Evelyn
Forecaster Reviewed: 
Yes
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Location

40° 33' 47.1132" N, 111° 41' 33.3276" W

I figured I'd take a quick look at lower elevation snow after spending most of the past week above 10,000'.  I had remembered Mark Hammond's observation form the 23rd and didn't have to get far to see one of the "in tree" slides on Pink Pine ridge - ENE facing, about 8,600', probably originally 2-3 feet deep, and several 100 feet wide.  Could have been a natural, or remotely triggered from the standard up track.  The slope angle of some sections of the crown were as low as 33 degrees, with blocks that cracked and moved a short distance on 26 degree slopes.

pink pine one.jpg

It ran through and/or initiated in trees much thicker than one would expect.   It's certainly given me a different perspective of our recent slide cycle, thoughts about "safe terrain" during a major storm and the unusually low slope angles that some slides could release or pull back on to..

pink pine 2.jpg

I dug a pit in an undisturbed area to the side of part of the crown.  ECT results similar to other places - requiring a lot of force to fail, but full propagation with a Q1 shear.  Also similar to the higher elevations, there were still facets remaining on the ground below the bed surface everywhere I looked.  

Surface snow was moist today, and it was just possible to trigger very small, damp sluffs on steep slopes. 

pink pin 4.jpg

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