Cooke City

Fluff over weak layers

Date
Activity
Ice Climbing

Just an initial look at low elevation snow around some of the ice climbs.

8" of new snow at the Grotto Falls TH. 
 

I couldn't find any surface hoar that was buried by last night's snow, but I'm sure it's out there. Doesn't really matter because there's plenty of weak, faceted snow that was the previous snow surface.

The new snow is all fluff and not a concern at lower elevations in Hyalite. Perhaps it could be enough of a load and enough of a cohesive slab at higher elevations where more snow fell. 

For now, things seem mostly stable, but that will change quickly with any amount of wind. 

 

Region
Northern Gallatin
Location (from list)
Hyalite - main fork
Observer Name
Staples

Scotch Bonnet and Sheep Mtn obs

Date
Activity
Skiing

We skied around Scotch Bonnet and Sheep Mtn., north of Cooke City today.

No collapsing nor cracking, nor any avalanche activity observed.

Snow profile attached from a SE aspect at 10,000' on Scotch Bonnet.  HS65, ECTP22 @25.

Surface hoar (4-8mm), observed on most slopes, except on steep solar slopes and especially windy locations.

Region
Cooke City
Observer Name
B. Fredlund

Woody Ridge, thin snowpack and some collapsing.

Date
Activity
Snowboarding

Snowpit from yesterday attached.   West aspect 9700'.  HS70, ECTP15 @ 23.

 

Some collapsing in the valley bottom, and also near the ridgeline- on both easterly and westerly aspects.  

 

Minimal wind effect.  Surface hoar to 10,000'.

Region
Cooke City
Observer Name
B. Fredlund

Old wind slab Henderson

Henderson Mountain
Cooke City
Code
HS-NC-R2-D1.5-G
Elevation
10100
Aspect
NE
Latitude
45.05240
Longitude
-109.94500
Notes

Hard wind slab likely on facets happened naturally maybe last week around Thanksgiving or just after. It is typically heavily wind loaded spot and was probably triggered by cornice fall. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Cornice fall
R size
2
D size
1.5
Bed Surface
G - Ground
Problem Type
Wind Slab
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Wet Loose at Lulu Pass

Lulu Pass
Cooke City
Code
WL-N-R2-D1-S
Elevation
10000
Aspect
S
Latitude
45.07090
Longitude
-109.95800
Notes

Natural loose wet avalanche

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet loose-snow avalanche
Trigger
Natural trigger
R size
2
D size
1
Bed Surface
S - Avalanche released within new snow
Problem Type
Loose Wet
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year