Cooke City

Another day, more big avalanches

Date
Activity
Snowmobiling

We rode over Daisy Pass and out to the pass between Wolverine and Abundance. Low on Daisy Road along the steep creek walls we saw three recent 2'+ deep avalanches. each 70-100' wide. HS-R4-D2-O. One looked within the last day or two and the other two were maybe 3-4 days old. Triggers unknown, there were various ages of sled/snowbike tracks nearby. We saw older crowns (4-7 days old) on east and north Miller Mtn.

Between Miller and Wolverine there was a recent large avalanche that I would guess was triggered yesterday. 3-6' deep, 250-300' wide. HS-R4-D2.5-O. Video and photos attached. Given the recent human triggered and natural avalanches, we expect dangerous conditions will continue to start the week.

Partly sunny skies, light to moderate winds with some stronger gusts and snow transport at ridgelines. Snow surface had a thick crust on any slopes that were not fully shaded yesterday. Rode back to town at noon and snow surface was still mostly frozen. Cloud cover increased through the day.

Region
Cooke City
Location (from list)
Wolverine Peak
Observer Name
Alex Marienthal

March 9 Round Lake/ East Side Sheep Mountain Avalanche

Date

We saw the slide happen.   Maybe 200 yards wide 4 to 10 ft deep crown.  Triggered by a guy riding along in the run out zone, he was partially buried and got himself out. One of the kids has some photos in this phone, we will try to send them shortly.

Region
Cooke City
Location (from list)
Sheep Mountain
Observer Name
Kevin Paul Syvrud

Natural on Republic

Republic Mountain
Cooke City
Code
HS-N-R4-D3-O
Elevation
8500
Aspect
N
Latitude
45.00030
Longitude
-109.95400
Notes

A natural avalanche was witnessed on the north side of Republic Mtn. on 3/9 at 4:54pm. It appeared to break around 3 feet deep.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
R size
4
D size
3
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Natural on Republic - 9 Mar

Date

A natural avalanche was witnessed on the north side of Republic Mtn. on 3/9 at 4:54pm. It appeared to break around 3 feet deep.

Region
Cooke City
Location (from list)
Republic Mountain