Photos

From obs [2/20/21]: "We observed a large natural slide on Flanders Mountain that likely occurred on Thursday (2/18/21). The crown ranged from 2-5’, but it’s hard to gauge how wide it was, because it covered a lot of elevations. I think there is considerable overlap with the large slide that ran there earlier this season. We did not observe any other slides, collapsing, or cracking, but the wind did pick up in the early afternoon." Photo: S. Reinsel

From obs: “Triggered a large slide with a snowmobile. Went all the way to the ground. Crown seemed to range anywhere from maybe 3 ft to 10 ft. Large slabs of snow broke free and slid for about 100 yards.”

From email: "I toured into Blackmore [2/19/21] and observed an old snow avalanche at 9600' on the east face of Mt Blackmore. I was there the day before and didn't see any evidence of avalanche activity; strong overnight winds with ample snow available for transport appeared to be enough to tip the scales." Photo: T. Guarino

From email: "I toured into Blackmore [2/19/21] and observed an old snow avalanche at 9600' on the east face of Mt Blackmore." Photo: T. Guarino

From email: "I toured into Blackmore [2/19/21] and observed an old snow avalanche at 9600' on the east face of Mt Blackmore. I was there the day before and didn't see any evidence of avalanche activity; strong overnight winds with ample snow available for transport appeared to be enough to tip the scales." Photo: T. Guarino

From email: "I toured into Blackmore [2/19/21] and observed an old snow avalanche at 9600' on the east face of Mt Blackmore. I was there the day before and didn't see any evidence of avalanche activity; strong overnight winds with ample snow available for transport appeared to be enough to tip the scales." Photo: T. Guarino

From e-mail:  "...a photo of what appeared to be a natural D2 underneath the Maid today [2/19/21]." Photo: H. Coppolillo

From email: "While on tour today above the canyon, we observed various snow surfaces. We found heavily windloaded slopes on E/NE aspects. Solar aspects began to develop rollers as rocks began to heat up around noon. We observed a small avalanche on E slope a drainage away, roughly 20 feet wide. While ascending a ridgeline at 7500 elevation, we had a massive woomph and crack that spread 100 feet from the ridge to a roller in the fall line." Photo: Tommy S.

Snowmobile triggered slide on Crown Butte, outside Cooke City. 2/18/2021

Snowmobile triggered slide on Crown Butte, outside Cooke City. 2/18/2021

Natural avalanche south of Saddle Peak. 2/18/2021

Photo: M. Stem

Photo: B. Finch

Observed on drive back from Bridger 2/18/21. Photo: J. Mundt

From email: "I just watched this slide from my house on Jackson Creek. It’s south of Saddle Peak." Photo: A. Coolidge

Wind-slab avalanche on the shoulder of Fisher Mtn. at about 10,000' elevation. This is the likely type of avalanche and type of location for slides in Cooke City right now. Photo: GNFAC

I triggered a small avalanche along the trail up Olson Creek in the Bangtails. It cracked about 75 feet wide, but only a small amount actually slid. Photo: C. Norem

From obs: "The southwest corner of the cirque slid on the storm slab and broke 1200-1500’ wide, an east aspect had a crown that exceeded 6’ in places, and the south face of Divide Peak broke 2-6’ deep and ran full track. I observed no collapsing or cracking, but the signs of instability were still pretty clear." Photo: S Reinsel

From obs: "The southwest corner of the cirque slid on the storm slab and broke 1200-1500’ wide, an east aspect had a crown that exceeded 6’ in places, and the south side of Divide broke 2-6’ deep and ran full track. I observed no collapsing or cracking, but the signs of instability were still pretty clear." Photo: S Reinsel

From obs: "The southwest corner of the cirque slid on the storm slab and broke 1200-1500’ wide, an east aspect had a crown that exceeded 6’ in places, and the south side of Divide broke 2-6’ deep and ran full track. I observed no collapsing or cracking, but the signs of instability were still pretty clear." Photo: S Reinsel

From FB: "Saw recent wind slab natural on NW facing start zone of tube south of Titanic. Ran into titanic approximately 500' vertical where tubes join. D2 in size. No other signs of instabilities noted." Photo: B. Zavora