Collapsing around Cooke City
We skied from Henderson Mtn over to Daisy Pass and had numerous large, thunderous whumps, bother there and back.
We skied from Henderson Mtn over to Daisy Pass and had numerous large, thunderous whumps, bother there and back.
We dug in the flank at about 10,100' to confirm that it released on facets under a wind slab. Photo: GNFAC
We skied onto the debris of the Henderson Mountain avalanche. It went as wide as it could and broke under the dense wind slab on facets (not surface hoar). We dug in the flank at about 10,100' to confirm that it released on facets under a wind slab. Afterward we skied over to Daisy Pass and had numerous large, thunderous whumps, both there and back. At Daisy Pass/Chimney Rock avalanche (from 1/25) we had poor visibility and could not see the debris or paths. I skied out looking for signs, but decided that wandering in runout zones with no visibility was a bad idea, so we returned back to the sleds on Henderson Bench.
30+ whumps on any slope with wind slab deeper than 5”. Happened on slopes from 0-30 degrees stayed off of and away from anything steeper.
Slide triggered from above (ridge line) onto east facing slide path on Bridger Ridge. Knocked off microwave-sized cornice while skinning which fell and triggered the slope below. We had zero intention of skiing that slope or any like it on todays tour. Slide seemed to start very slowly and then propagated North (to the left in the pictures) before running down the slide path. Looking at the slope no parties or individuals were present around us or in the run out to the best of our observations. Not surprised by the instability at play and yet another reason to heed to the forecast.
From BBSP: "a jug of ANFO released an R2D2 avalanche that was 16" deep and 150ft wide that ran down to near the upper gate traverse level. It broke on the basal crust that had 4mm facets above."