Avalanche Activity
SS-ARu-R2-D2-O
Elevation: 9,000
Aspect: NE
Coordinates: 44.7145, -111.3180
Caught: 0 ; Buried: 0
Was splitboarding up near lions head ridge today. Made some bad decisions and kicked off a good slide in a NE facing chute. Was with 2 buddies, 1 of which skied the line 3 weeks ago. Underneath about a foot of new powder snow there was a firm crust that seemed like it was old hard windslab in the gut of the chute, and I think a sun crust on the riders left side(East aspect). We had 2 spots where we were planning to re group at, first was a small cubby area right before a slight rollover about 75 ft from the top. I dropped first, made some turns down toward the pulloff, as I pulled in, I triggered a good size slab that propagated maybe 40-50 ft across, at the rollover as I carved into the pulloff. Pulled all snow out of the chute down to the ground. Seemed to have failed on sugary facets on ground/ice crust close to the ground...
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Coordinates: 45.0202, -109.9380
Caught: 0 ; Buried: 0
Skied around Mt. Henderson today. Was finding around 28-35 cm of new snow at 9k'. Perhaps 10cms in town. Light density. Minor wind effect. Partly cloudy morning, turning mostly cloudy. Cold temps. Calm to light winds where I was, but lots of snow was being transported off the exposed ridgelines south of town. Quite a bit of cracking of the new snow this morning while breaking trail and while skiing, even though the wind effect was still Fist hardness. A couple of collapses noted as well in the deeper drifts.
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Coordinates: 45.0607, -111.2720
Caught: 0 ; Buried: 0
Went into the Lightning/Taylor Creek area of the Southern Madison’s in search of some powder skiing with the new snow. On our ascent toward Woodward Mountain via the backside, we found fresh snow varying from 2 inches at the trailhead to foot deep lightly drifted areas in the upper elevations. In the protected low angle gully we ascended this new snow sat atop either rocks or a very stout wind crust. The latter of which made for great skiing. We descended Woodward top down and assessed the possibility of thin (3”) wind slabs being reactive on the stout wind crust as the Woodward side seemed to have received a lot more loading from the storm’s E winds. As we rolled over to slightly steeper terrain, I noticed the snow stiffening just below my skis and gave it a few hops where I intentionally popped the pictured slab. With this information, we decided to carefully traverse to more protected trees and descend via a less wind loaded and hazardous route. We ski cut from tree to tree triggering a few more of these very small slabs before finding wonderful powder skiing lower on the mountain where the wind had significantly less effect.
All of the slabs were 1 to 4 inches deep and propagated 5 to 15 feet wide. None of them possessed the mass or were on steep enough terrain to overcome and slide over the stauch wall. Overall was a great lesson in mitigating hazard and we were rewarded with some great turns.
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N
Aspect: E
Coordinates: 45.4402, -110.9310
Caught: 0 ; Buried: 0
From FB message: "Hi! I’d like to report 2 natural slides that were witnessed in the Flanders fork of Hyalite on Friday 11/24 on the east facing aspect of the canyon. Both avalanches came from a single snow field above “Bobo Like” ice climb. These slides happened at approximately 7:45am and 8:15am"
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ASu-R2-D2-O
Elevation: 9,750
Aspect: E
Coordinates: 45.4443, -111.0020
Caught: 0 ; Buried: 0
Skiers reported triggering an avalanche on the east face of Mt. Blackmore on Sunday.
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N-R2-D2
Coordinates: 45.0524, -109.9450
Caught: 0 ; Buried: 0
Avalanches on Henderson Mountain near Cooke City were reported via instagram on 11/9/2023. Estimating they occurred a day earlier.
From message: "on Henderson in Cooke just above the lulu trail. It was surprising to see so much activity"
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HS-ASu-R1-D1.5-O
Elevation: 9,000
Aspect: N
Coordinates: 45.8926, -110.9620
Caught: 1 ; Buried: 0
From observation: "Skier triggered windslab in the Great One off of Naya Nuki peak, skier was carried 15-20ft before arresting. Slide was triggered roughly halfway down the couloir where the right wall dips away exposing the snow to wind. Hard consolidated snow over facets, roughly 1-1.5 ft thick, ran about 50-100 ft before pouring over the cliff faces below. North- northeast aspect." 11/8/2023
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L-N-R1-D1-O
Elevation: 8,200
Aspect: NE
Coordinates: 45.8156, -110.9230
Caught: 0 ; Buried: 0
A hiker at Bridger Bowl noticed a small, loose snow avalanche near the Apron. Noting that it was a, "Good reminder as to how little snow is required to have an avalanche!"
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WL-N-R2-D2-G
Elevation: 9,500
Aspect: NW
Coordinates: 45.1628, -111.5290
Caught: 0 ; Buried: 0
From IG: “Pine creek today, some small wind slabs and a full depth wet slide off black mountain”
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WL-N-R1-D2-O
Elevation: 9,900
Aspect: N
Coordinates: 45.4457, -111.0040
Caught: 0 ; Buried: 0
From obs. (10/21): "Was out alpine climbing today and observed the north face of Blackmore had slid already."
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