Photos

Displaying page 3 of photos 41 - 60 of 401
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

Link to Avalanche Details
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

Link to Avalanche Details
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

Link to Avalanche Details
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

Link to Avalanche Details
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. 

Link to Avalanche Details
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

Link to Avalanche Details
Bridger Range, 2020-02-11

Photo: @letemrun23

Link to Avalanche Details
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
Northern Gallatin, 2020-02-11

"I observed this collapse & propagation as I stepped over some wood in the skinner on the north ridge of Mount Ellis this morning, ~8000’, due East. I was tailing Chabot and his partner, and they had passed this way just minutes before." Photo: D. Rider

Link to Avalanche Details
Northern Madison, 2020-02-11

I observed some good size crowns from Beehive Basin Road this afternoon. They were on the west side of the ridge dividing Beehive Basin and Jack Creek. They were not down to the ground but big and wide looked like probably all the recent snow from the storm. Photo: T Grande

Link to Avalanche Details
Northern Madison, 2020-02-11

I observed some good size crowns from Beehive Basin Road this afternoon. They were on the west side of the ridge dividing Beehive Basin and Jack Creek. They were not down to the ground but big and wide looked like probably all the recent snow from the storm. Photo: T Grande

Link to Avalanche Details
Cooke City, 2020-02-11

Natural avalanches on a west aspect at about 8300' a few miles west of Cooke City. These slides are about 2' deep and 30-50' wide. Photo: B Fredlund

Bridger Range, 2020-02-11

One large avalanche (photos attached) ripped mid-storm and deposited debris into the meadow to approximately 50m of the temporary WX station. Estimated as "SS-N-R3-D3-S” with multiple snapped trees in the debris (one 20’+ tall). Couldn’t get eyes on the whole crown, but it appeared to have ripped up near the ridge 3-4’ deep and cascaded over the cliffs triggering deeper avalanches in the aprons below before running well into the flats. A foot of new snow has covered the debris making it harder to clearly delineate its extent. Photo: Z Miller

Link to Avalanche Details
Bridger Range, 2020-02-11

One large avalanche (photos attached) ripped mid-storm and deposited debris into the meadow to approximately 50m of the temporary WX station. Estimated as "SS-N-R3-D3-S” with multiple snapped trees in the debris (one 20’+ tall). Couldn’t get eyes on the whole crown, but it appeared to have ripped up near the ridge 3-4’ deep and cascaded over the cliffs triggering deeper avalanches in the aprons below before running well into the flats. A foot of new snow has covered the debris making it harder to clearly delineate its extent. Photo: Z Miller

Link to Avalanche Details
Northern Madison, 2020-02-10

This large natural slide broke during the storm on Feb 7. It is at the top of Muddy Creek on Buck Ridge. Photo: Jake Tocco

Link to Avalanche Details
Northern Madison, 2020-02-10

This large natural slide broke during the storm on Feb 7. It is at the top of Muddy Creek on Buck Ridge. Photo: Jake Tocco

Link to Avalanche Details