Cooke City

New, unrecorded snow in Cooke

Date

Just wanted to send in a quick ob about snowfall.. in the last 24 hours at the Roost it snowed about 4 inches despite Fisher recording 0 inches of SWE

Region
Cooke City
Location (from list)
Henderson Mountain
Observer Name
Jake Mundt

Obs from MZY Level 1

Date
Activity
Skiing

Today, during a level 1 avalanche course north of Cooke City, we did a total of 7 ECTs north of Companion Lake. We did 4 ECTs at 9640ft, two on a NW aspect and two on a SE aspect. These were all ECTNs in the mid 20s. We did 3 more ECTs on a north facing slope at 9380ft. Here we got two ECTXs and one ECTN 25. The buried surface hoar layer from early December was visible in every pit, ranging from 90 cm to 105 cm deep. The deepest snow we found was 185cm. 

Region
Cooke City
Location (from list)
Mt. Zimmer
Observer Name
N Mattes

Natural Avalanche E Face of Sheep Mountain

Sheep Mountain
Cooke City
Code
SS-N-R2-D2-G
Aspect
E
Latitude
45.07220
Longitude
-109.92800
Notes

3-4 foot crown about 100 yards wide on East face of sheep mountain. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
G - Ground
Problem Type
Persistent Weak Layer
Slab Thickness
42.0 inches
Vertical Fall
250ft
Slab Width
300.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Natural avalanche east face sheep mountain

Date
Activity
Snowmobiling

3-4 foot crown about 100 yards wide on East face of sheep mountain. 

Region
Cooke City
Location (from list)
Sheep Mountain
Observer Name
Mike

Storm slab Avalanches near Cooke

Daisy Pass
Cooke City
Code
SS-R3-D2
Elevation
9800
Aspect
W
Latitude
45.05900
Longitude
-109.95600
Notes

On Jan 2, 2025 We rode over Daisy Pass and out to Abundance, then around Fisher and behind Scotch Bonnet, and back to Lulu Road. Visability was marginal with overcast skies and light snowfall in and out through the day. Wind was light to moderate with moderate gusts. Moving some snow from trees and along the surface, stiffening slabs. Snowfall rates picked up this evening. 

We saw three avalanches just north of Daisy Pass and one on Henderson Mtn. The one on Henderson was difficult to see the crown, but we could see the debris. Two of the slides north of Daisy were 2-3' deep and 100-150' wide and ran into thick stands of trees, looked like thick soft slabs/drifts of recent snowfall. The other slide was 1-2' deep and 300-500' wide, soft slab of recent snow.

Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
R size
3
D size
2
Problem Type
Storm Slab
Slab Thickness
24.0 inches
Vertical Fall
300ft
Slab Width
150.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year