Slab avalanche on NE facing slope at 7,500 feet - slid to the ground.
Large avalanche crown across the east facing saddle off the north side of Electric Peak. Roughy around 10,500 ft, around 800 feet across the crown, looked to have broke around 1-2 feet deep and would guess it happened in the last few days. Lots of active wind loading happening.
Dug two pits on Texas Meadow north of Bridger Bowl. Generally good stability. Main concern is recent snow which appeared well bonded in pits. Deeper weak layers were stubborn to non-reactive, but a few deeper layers exist enough to create a deep slab concern if there is more loading, or when things start to melt...
Recent avalanche activity along the range (from Bridger Peak to The Throne) was confined to loose snow avalanches involving the most recent storm snow. A few natural, and many skier triggered which were large and probably occurred a day or two ago after 8-11" of heavy snow fell. There was minimal recent wet snow activity. Slopes that face the sun had a 3 cm crust which started to get damp this afternoon, but cooled off before it became weak enough to create any wet snow hazard.
Shady slopes stayed dry, and there was evidence of near surface faceting on shady slopes, and a thin dry layer of facets formed above the crust on slopes facing the sun.
From obs 3/18/23: "Watched two riders on the north side of Henderson / Daisy pass high marking. One triggered an large avalanche and got stuck at the crown. Crown was taller than him. Guessing 8-10’ deep and 200+ yards wide. His friend had his back turned to the slide and didn’t see it happen. We were across around the sheep mtn/ Scotch Bonnet area and watched the whole thing happen. We boogied over there as fast as possible to help."
More media and story: https://www.instagram.com/p/Cp8qvlfO4sM/ (Credit: C. Diffley)
From 3/18/23: "Watched two riders on the north side of Henderson / Daisy pass high marking. One triggered a large avalanche and got stuck at the crown. Crown was taller than him. Guessing 8-10’ deep and 200+ yards wide.... We were across around the sheep mtn/ Scotch Bonnet area and watched the whole thing happen. We boogied over there as fast as possible to help." Photo: C. Diffley
From 3/18/23: "Watched two riders on the north side of Henderson / Daisy pass high marking. One triggered a large avalanche and got stuck at the crown. Crown was taller than him. Guessing 8-10’ deep and 200+ yards wide.... We were across around the sheep mtn/ Scotch Bonnet area and watched the whole thing happen. We boogied over there as fast as possible to help." Photo: C. Diffley
Big scary avalanche on a wind loaded slope on mount Bole.
Large avalanche on Mt. Bole seen by skiers on 3/17/23.
