Old Man's Bowl - Wind Effect, cold slopes

Submission Info
Monday, March 26, 2018 - 1:00pm
Red Flags: 
37° 34' 9.3972" N, 118° 51' 11.1672" W
Snowpit Observations
More detailed information about the snowpack: 

-Toured up form Convict Lake up to top of Old Man's Bowl (10,800') and back down.

-No clouds, light N gusts at ridgetop and treeline, COLD (-10C / 14deg F at 10,800' at noon).    

-Most everywhere was significantly wind effected, from firm windboard to sastruggi to breakable crust.  

-Snow surfaces even on SE aspects after noon showed no signs of warming above 9600'.  Below 9400', E and SE aspects showed surface melt/freeze.  

-No signs of loose wet insatbilities anywhere before 1:30pm.  

-Test pit dug at 10,200', ENE aspect to check how dense windslab was bonding:  See attached video: ECTP22 down 30cm. 0-30cm=Pencil Plus windslab; 30-37=4finger; 37-50=1 finger.  It would take a WHOLE LOT for this layer to be triggered in this area, but where such a structure was found with a thinner windslab it's concievable that a human could trigger an isolated pocket in steep above treeline terrain.  

-As previously reported IMPRESSIVE debris below E facing slopes from big avalanches which occured during the heavy loading on Thursday March 22. See attached pics.  Smaller crowns visible from post-storm wind-loading likely to have occured on Friday on steep cross -loaded N facing slopes (see attached photo.) 



Snowpack photos: 
Snowpit videos (tests, etc): 
Weather Observations
Blowing Snow: 
Air temperature: 
Wind Speed: 
Air temperature trend: 
Wind Direction: 
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More detailed information about the weather: 
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