Photos

Displaying page 14 of photos 261 - 280 of 629
Southern Madison, 2020-02-16

Slide in Taylor’s Fork, crown of about 5-6’ and about 100' wide. Human triggered. Photo: Matt Seifert

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Northern Gallatin, 2020-02-16

From an observation, "This activity appears to have occurred naturally. No signs of a skin track or skiing. No accurate indication of when it happened, tho appeared fairly recent with no new wind loading." Photo: R. Siberrel

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Northern Gallatin, 2020-02-16

From an observation, "This activity appears to have occurred naturally. No signs of a skin track or skiing. No accurate indication of when it happened, tho appeared fairly recent with no new wind loading." Photo: R. Siberrel

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Northern Gallatin, 2020-02-16

Picture taken on Alex Lowe Peak from Mount Blackmore. This is the second time this avalanche path released. See a photo from 1/25/20 HERE.  Photo: Zane Heaton

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Northern Gallatin, 2020-02-16

Picture taken on Alex Lowe Peak from Mount Blackmore. This is the second time this avalanche path released. See a photo from 1/25/20 HERE.  Photo: Zane Heaton

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Northern Gallatin, 2020-02-16

Observed a sizable deep slab in the Divide basin which appeared to have run within the last few days. The crown extended from the southern end of the basin (northeast facing) through the summit run off Divide (southeast facing)--maybe around a mile. Slab height varied, with the upper end pushing 10 feet and the lower closer to a foot or two. On Divide, the crown approached the summit and debris had run across the flat to the mature trees. Looked like it may have been cornice triggered at the southern end on thinner cover in rocky terrain. Also observed a similar slide at the head of the Storm Castle drainage. Pretty wild. Photo: Nick VandenBos

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Northern Gallatin, 2020-02-16

Observed a sizable deep slab in the Divide basin which appeared to have run within the last few days. The crown extended from the southern end of the basin (northeast facing) through the summit run off Divide (southeast facing)--maybe around a mile. Slab height varied, with the upper end pushing 10 feet and the lower closer to a foot or two. On Divide, the crown approached the summit and debris had run across the flat to the mature trees. Looked like it may have been cornice triggered at the southern end on thinner cover in rocky terrain. Also observed a similar slide at the head of the Storm Castle drainage. Pretty wild. Photo: Nick VandenBos

Link to Avalanche Details
Northern Gallatin, 2020-02-16

Observed a sizable deep slab in the Divide basin which appeared to have run within the last few days. The crown extended from the southern end of the basin (northeast facing) through the summit run off Divide (southeast facing)--maybe around a mile. Slab height varied, with the upper end pushing 10 feet and the lower closer to a foot or two. On Divide, the crown approached the summit and debris had run across the flat to the mature trees. Looked like it may have been cornice triggered at the southern end on thinner cover in rocky terrain. Also observed a similar slide at the head of the Storm Castle drainage. Pretty wild. Photo: Nick VandenBos

Link to Avalanche Details
Northern Madison, 2020-02-16

We encountered a natural avalanche that appears to have been triggered by a cornice drop. There seemed to be very little fresh snow on the slide surface so we suspect it occurred recently (Feb 14?). The slide occurred on the west side (east facing side) of Bear Basin (pinpoint on the map below). The avalanche was probably 200 feet wide at the top so it clearly propagate across the slope. Crown was 2 to 5 feet tall. We did not hike in there to investigate more carefully. There is a fair amount of trees on this part of the ridge. The picture shows how some large chunks got hung up on trees but we could see that the slide ran across the creek below (almost 1000 vertical feet). We had planned on skiing this slope and/or the open meadow (talus field) a hundred yards north but in light of this observation we turned around, skied back down in Middle Basin in the trees. Side note: we dug a pit earlier on an almost identical aspect (on the Beehive/Middle basin ridge) and obtained ECTN 16 @ 12" below the surface, ECTN 23 @4" below that, ECTN 28 @ 6" below that... Basically some definition between the latest storm layers but no propagation, and a right-side up snow pack. We only dug about 3 feet deep so this pit did not assess the ground level facets, which we figure are wide spread. The natural slide we encountered one ridge over seemed to be a case where a thin area was triggered by a cornice drop. Photo: Alex Lussier

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Northern Gallatin, 2020-02-16

Skied the NE shoulder of Divide Peak. Spotted a 1/4 to 1/2 mile long crown spotted along the NE face of Peak 10,024, between Divide Peak and Hyalite Peak. We could not directly determine the crown height, but it was highly visible from our location ~1 mile away. Photo: Tom Kalakay

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Lionhead Range, 2020-02-15

We rode into Lionhead and found good stability. A sledder highmarked up the hill and then came down right next to us, confirming our results. Wind-loading from yesterday is still a concern, and so are the facets near the ground, although less so than a couple weeks ago. Photo: GNFAC

Southern Madison, 2020-02-15

Surface Hoar in Taylor Fork on 2/13/2020.

Northern Madison, 2020-02-15

Cornice fall triggered a soft slab avalanche in the Spanish Peaks on the afternoon of 2/13/2020.

From email: "100 feet wide, slid the new snow layer maybe 2-3 feet deep, made a pretty good runnel, and went close to full path , so it must have entrained a decent amount of snow to travel that far .."

Photo: R. Hollow

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Northern Madison, 2020-02-14

From observation: "My riding group came upon a group of three riders from out of state digging out a sled. A single rider had been side hilling a steep slope above a deep creek drainage. This is where the trail leaves Third Yellow mule and drops into McAtee. The slope broke with a single rider high on the slope completely burying the sled. The rider managed to stay on top of the debris. The debris was very deep (~12'-15') as it filled in the drainage below."

Photo: R. Smith

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Northern Gallatin, 2020-02-14

An avalanche on Garnet Mountain that was was remotely triggered by skiers on Wednesday, 2/12/2020. It broke 4 ft deep on facets at the ground. 

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Northern Madison, 2020-02-13

Explore Big Sky wrote an article on the new beacon checker at the Beehive Trailhead near Big Sky. It was a collaboration between the Friends of the Avalanche Center, the GNFAC and the Big Sky Community Organization.

Bridger Range, 2020-02-11

Photo: @letemrun23

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Bridger Range, 2020-02-11

Photo: @letemrun23

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Bridger Range, 2020-02-11
"looks like this likely released from a cornice drop on the football field. Broke across second rock band level, leaving all the snow above intact." Photo: BBSP Link to Avalanche Details
Northern Madison, 2020-02-11

"...today we toured into an east aspect in the N. Madison. Winds were stronger than we anticipated, already western sides of ridges had been scoured to near bare ground. While skinning along the ridge we intentionally triggered large wind drifts and small cornices. We dug a pit on a south/south east aspect and got ectp 25. While skiing a low angle meadow back out to the ridge a member of our party remote triggered a small slide on a wind loaded pocket on an east aspect. According to my partner it was 75 ft wide and maybe a 1-2 feet deep. Conditions seemed to become more touchy thru out the day due to the high winds." Photo: Alex Palombo

Link to Avalanche Details