Chilly day with mostly calm winds, except for some light downslope winds in Old Man’s Bowl proper. No clouds.
|4||Older than a week||
Mini-Morrison aka Mono Jim easterly chutes and Old Man's Bowl
Went to investigate this avalanche crown that likely released during the snowfall and wind event on 12/29 to see if wind slab released on basal facets, or just a normal wind slab. R3-D2.5. Crown was on NE aspect at 10,750′, and ran 2/3 of a mile and nearly 1,500′ vertical with tree debris deposited at 9,300′. Avalanche did indeed release on basal facets. Total snow depth at crown is 1meter, top 50cm pencil hard wind slab ontop of 40cm of 2cm facets varying in hardness from fist pus to 4finger plus, ontop of 10cm of basal ice. Crown ranged from 1-2ft deep and ~40meters wide. Lots of open cracks still visible to lookers right of crown that didn’t actually slide, even a couple hundred feet downslope. CT27Q1 and ECTP26 in snow remaining above crown, 5-10cm down in facet layer.
-Evidence of several other D2.5 avalanches that ran down east slopes of Mini-Morrison as well.