Location: Crested Butte Area
Date of Observation: 02/15/2018
Name: Ben Pritchett
Aspect: North, North East
Saw 4 D2’s on Schuylkill that ran sometime between Tuesday afternoon and Wednesday mid-day. SS – N – R1/D2 – O
Weather: Snowed pretty much all afternoon, steady. Didn’t accumulate to that much, only an addition 3″ in the PM hours, but certainly made the surfaces soft. HN24 7-10″, measured .7″ SWE. No significant wind transport observed in the sheltered terrain where we were, but west winds really don’t hit Pittsburg. Probably quite windy elsewhere.
Snowpack: Didn’t get any cracking or collapsing in the new snow, but by mid-afternoon sloughs were running in steep terrain over 40 degrees.
Dug in two places.
1) 10,400′ NE – in a path that avalanched January 12th below the holiday slab (12/23 interface). total HS was ~135cm. ECTP moderate, popping into our pit with a lot of umpf. Scary structure and represents a similar structure to the avalanches observed below, and the recent mention of skier triggered activity in the last 10 days.
2) 10,600′ NE – in a path that had not avalanched this season. Total HS was 170cm. ECTN. Just too deep and slab too stiff for ECT results. PST End 40/135 repeated in a couple tests, with identical results. Also tested both the 12/23 interface (below holiday slab), and the 1/6 interface just above it. Both produced 40/135 results twice, but the block collapsed and slid on the 12/23 interface. These weak layers are pretty deep and not reacting right now, but worrisome if we get a really big load at once. This slow steady snowfall over the past week hasn’t triggered any slides on these weak layers locally.