Photos

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Southern Madison, 2023-01-28
Southern Madison, 2023-01-28
Southern Madison, 2023-01-28
Northern Madison, 2023-01-27

We saw this rider triggered avalanche along the road to Buck Ridge. It was triggered today, 1/27/23. Photo: GNFAC

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Cooke City, 2023-01-27

Natural avy on SE aspect 8000 ft 35 to 40 degrees broke on new snow interface today. YNP next to silver falls. Also several slides in gully below falls. Photo: D. Carroll

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Cooke City, 2023-01-27

A natural avalanche near round lake, Cooke City. Photo: S. Reagan

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Lionhead Range, 2023-01-25

Observed two recent natural avalanches on 1/25/23 that broke 1-2 feet deep, presumably on a surface hoar layer. There was a couple of inches of snow on each of these slides, so I would place them between three and five days old. The slides were R1-D1.5 in size - 75-100' wide, 1-2' deep, and 100' vertical fall. Photo: GNFAC

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Lionhead Range, 2023-01-25

Observed two recent natural avalanches on 1/25/23 that broke 1-2 feet deep, presumably on a surface hoar layer. There was a couple of inches of snow on each of these slides, so I would place them between three and five days old. The slides were R1-D1.5 in size - 75-100' wide, 1-2' deep, and 100' vertical fall. Photo: GNFAC

Link to Avalanche Details
Northern Gallatin, 2023-01-23

Skiers near Mt Blackmore noted loose snow avalanches with ski cuts. This one slid for about 50 feet on a 34 degree slope. This location did not present any signs of significant wind loading. Photo: E. Schreier

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Southern Madison, 2023-01-23

Surface hoar can often be seen as a grey stripe on the wall of your snowpit as was the case at Bacon Rind in the Southern Madison Range on 1/23. Photo: GNFAC

Cooke City, 2023-01-22

Observed this cornice fall triggered slide morning of 1/19/23. It was not there the previous morning which was sunny and clear. Photo: GNFAC

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Northern Madison, 2023-01-22

From Big Sky Ski Patrol 1/21/23: "skier triggered a surface wind slab in Wyoming Bowl that broke 8-12” deep. It propagated to an estimated 150’ wide- SS, R1/D1.5... The slide was small, no one was hurt, and the avalanche was reported (which we appreciate), with no further public involvement other than the trigger."

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Northern Gallatin, 2023-01-22

Bad quality but a D2, R3 natural in Flanders cirque. Looked like it was just the new snow, but hard to say.... on a NW aspect around 9,500 feet. Photo: O. Desroches

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Cooke City, 2023-01-19

We dug five snowpits and performed extended column tests in each on 1/19/23 near Cooke City. Four snowpits were on northeast to north facing slopes between 9,200-10,000', and one pit was on a southwest facing slope at 9,200'. In one pit on a NE aspect at 9,200' we had an ECTP 15 on the surface hoar 35 cm below the surface. In all other pits we had ECTN14-19 at the depth of the surface hoar, and no obvious feathery crystals were visible. The layers where the ECTNs broke appeared to be decomposing, preserved dendrites or maybe decomposing surface hoar. Photo: GNFAC

Lionhead Range, 2023-01-19

A natural slide in the back bowls of Lionhead.

Lionhead Range, 2023-01-19

Dave and Doug rode around and saw multiple natural and 1 sledder triggered slide on Lionhead. Some were thin and just involved news snow and others were deeper and broke on the buried surface hoar layer.

Link to Avalanche Details
Lionhead Range, 2023-01-19

Dave and Doug rode around and saw multiple natural and 1 sledder triggered slide on Lionhead. Some were thin and just involved news snow and others were deeper and broke on the buried surface hoar layer.

Link to Avalanche Details
Cooke City, 2023-01-19

Observed a point release that appeared to have stepped down. This occurred SE of the “rip curl” zone. We also noticed significant sun effect and a warming trend throughout the day. 1/17/23

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Northern Madison, 2023-01-19

Natural soft slab release likely in the last 36 hours. Seen from in-bounds at the Yellowstone Club. Avalanche location at 45.2116512 N 111.47811 W at the headwaters of Muddy Creek. 

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Bridger Range, 2023-01-19

Another slide was seen from the highway in Argentina Bowl. This slide appears to be a shallow soft slab that ~50 ft wide and ran ~500 vertical ft.

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