Northern Gallatin

Shooting Cracks on Blackmoore

Date
Activity
Skiing

Good mellow dust on crust skiing with 1”-3” of poorly bonded new snow. Widespread shooting cracks observed on new snow interface on all aspects traveled through the day (primarily E and S facing aspects). Lots of wind transport filling in the skin track between laps and creating light reactive slabs ~5” deep in places (see photo) primarily out of the west but generally inconsistent in direction. 

Region
Northern Gallatin
Location (from list)
Mt Blackmore
Observer Name
Elliot Kiesz

Small Loose Snow Avalanches in South Cottonwood Basin

Mt Blackmore
Northern Gallatin
Code
SS-NC-R1-D1
Latitude
45.42980
Longitude
-111.00000
Notes

Skied into South Cottonwood basin from Blackmore today. Skiing was sub-par with lots of wind scouring and intense active snow transport. Along with the slides observed yesterday, two recent R1-D1 slides were observed in South Cottonwood Basin: below the Dogleg and on N Twin's west wall via cornice break. No surface hoar, slides from today, or cracking/collapsing were observed. 

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Cornice fall
R size
1
D size
1
Problem Type
Wind-Drifted Snow
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Continued wind around Blackmore

Date
Activity
Skiing

Skied into South Cottonwood basin from Blackmore today. Skiing was sub-par with lots of wind scouring and intense active snow transport. Along with the slides observed yesterday, two recent R1-D1 slides were observed in South Cottonwood Basin: below the Dogleg and on N Twin's west wall via cornice break. No surface hoar, slides from today, or cracking/collapsing were observed. 

Region
Northern Gallatin
Location (from list)
Mt Blackmore
Observer Name
E. Webb

Small windslabs on Mt. Blackmore

Mt Blackmore
Northern Gallatin
Code
HS-N-R1-D1
Latitude
45.44440
Longitude
-111.00400
Notes

Three small fresh natural wind slab avalanches were seen on the east face of Mt. Blackmore on 1/31/25.

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

From obs: "Wind was rocking in alpine today, fresh windslabs forming and naturally releasing. I could make out 3 on E face, but rough vis with blowing snow. Exposed terrain in alpine had about .5” ice crust from yesterday’s sunshine.

This slab (in pic) released around 11-noon-ish." Photo taken 1/31/25

Northern Gallatin, 2025-02-01

Windslabs on Blackmore

Date
Activity
Snowboarding

Wind was rocking in alpine today, fresh windslabs forming and naturally releasing. I could make out 3 on E face, but rough vis with blowing snow. Exposed terrain in alpine had about .5” ice crust from yesterday’s sunshine.

This slab (in pic) released around 11-noon-ish. 

Region
Northern Gallatin
Location (from list)
Mt Blackmore

Surface Conditions in Hyalite

Date
Activity
Skiing

Large surface hoar across a variety of elevations and aspects at Lick Creek. It was 2-5mm large and present on almost all flats and non-solar aspects, and from the road up to 8500 ft and above. The most recent snow was wetting out on the solars, and temperatures were well above freezing at my car when I got back to it in the early afternoon.

Region
Northern Gallatin
Location (from list)
Lick Creek
Observer Name
Wyatt Hubbard