Photos

There were many loose snow avalanches or sluffs with the 8" of new snow in Hyalite. These avalanches were not breaking as slabs but a thin layer of weak, near surface facets caused the new snow to slide actively. Photo: S. Reinsel

One of many natural and snowmobile-triggered avalanches in the Taylor Fork that failed during and immediately after this week's storm. Over 2 feet of snow fell from Thursday through Saturday overloading a snowpack with multiple weak layers. Photo: GNFAC

One of many natural and snowmobile-triggered avalanches in the Taylor Fork that failed during and immediately after this week's storm. Over 2 feet of snow fell from Thursday through Saturday overloading a snowpack with multiple weak layers. Photo: GNFAC

One of many natural and snowmobile-triggered avalanches in the Taylor Fork that failed during and immediately after this week's storm. Over 2 feet of snow fell from Thursday through Saturday overloading a snowpack with multiple weak layers. Photo: GNFAC

One of many natural and snowmobile-triggered avalanches in the Taylor Fork that failed during and immediately after this week's storm. Over 2 feet of snow fell from Thursday through Saturday overloading a snowpack with multiple weak layers. Photo: GNFAC

One of many natural and snowmobile-triggered avalanches in the Taylor Fork that failed during and immediately after this week's storm. Over 2 feet of snow fell from Thursday through Saturday overloading a snowpack with multiple weak layers. Photo: GNFAC

A large natural avalanche on the east face of Woodward Mountain likely failed on Friday or Saturday. Based on looking at the map this avalanche was about 0.25 miles wide. Photo: GNFAC

Photo: C. Welty

A skier sent this photo of a cornice that cracked from about 20' away. Photo: B. Fredlund

From obs: " Remotely triggered from tracks visible on right side of photo. This photo shows one of five similar remotely triggered avalanches today... All five avalanches released from 35-40 degree rollovers at the interface beneath ~20cm of new snow and were all size D1. The five avalanches spanned from 8500-9500 feet elevation on SE, S, SW, and NW aspects. No activity (e.g. wumphing, cracking, avalanches) was observed below the new-old snow interface." Photo: J. Taylor

Natural avalanche north of Cooke City on 1/30/21. Photo: Z. Peterson

From obs: "While driving down the spur road in Big Sky, I noticed this small avalanche on the SW face of Yellow Mountain around 3:30pm" Photo: T. Whatford

From obs: "A natural avalanche occurred on an East aspect in the Maid of the Mist basin. It appeared to have slid last night/this morning. Visibility made it difficult to determine the extent of the debris or the depth of the crown." Photo: S. Wilson

Skiers remotely triggered this slide, from low angle terrain, below and far to the side on 1/30/21. It is on Ernie Miller ridge near Bacon Rind on E aspect around 9,000' elev. Click below for more info.

Skiers remotely triggered this slide, from low angle terrain, below and far to the side on 1/30/21. It is on Ernie Miller ridge near Bacon Rind on E aspect around 9,000' elev. Click below for more info.

Skiers remotely triggered this slide, from low angle terrain, below and far to the side on 1/30/21. It is on Ernie Miller ridge near Bacon Rind on E aspect around 9,000' elev. Click below for more info.

Skiers remotely triggered this slide, from low angle terrain, below and far to the side on 1/30/21. It is on Ernie Miller ridge near Bacon Rind on E aspect around 9,000' elev. Click below for more info.

Skiers remotely triggered this slide, from low angle terrain, below and far to the side on 1/30/21. It is on Ernie Miller ridge near Bacon Rind on E aspect around 9,000' elev. Click below for more info.

Skiers reported widespread collapsing and cracking of the snowpack, breaking on weak sugary snow near the ground, and said, "snow was falling off trees hundreds of feet away with some collapses." Photo: E. Knoff

This avalanche was triggered on 1/30/21 by skiers from low angle terrain adjacent to the slope, and a long ways away. Photo: G. Stevens