21-22

Large natural avalanche on Cedar Mountain

Cedar Mtn.
Northern Madison
Code
N
Latitude
45.22680
Longitude
-111.51200
Notes

The Big Sky Ski Patrol saw this natural avalanche as it occurred. "This morning around 8:45AM myself and my route partner were doing control work in hanging valley. I watched as he prepared a shot and saw a big cloud of snow on Cedar behind him. As I was looking I saw an avalanche appear from below the blowing snow. I watched it run from near the top of the ridge to the runout approximately 800-1000 ft below. It looked like most of the bowl was involved in the avalanche so I estimate the crown to be likely 1000ft wide. It looked to not be an enormous amount of volume so I estimate it to be likely between 6in and 2ft. We did not get a good view of crown as weather moved in shortly after and winds were strong."

Number of slides
1
Number caught
0
Number buried
0
Trigger
Natural trigger
Vertical Fall
1000ft
Slab Width
1000.00ft
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Natural avalanches near Cooke City

Zimmer Creek
Cooke City
Code
SS-N-R2-D1-I
Elevation
9000
Aspect
SE
Latitude
45.09990
Longitude
-109.88400
Notes

Skiers near Zimmer Creek observed a couple natural avalanches that occurred during the day and early this morning on 3/14/22.

Another group reported: "Avalanche on Mt Fox, E aspect that likely ran on the same layer. Visibility was too poor for a photos. D2-R1 ran aprx 400' feet and crossed the bench at its Southern edge for about 100'."

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
12.0 inches
Vertical Fall
100ft
Slab Width
150.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Skier remote triggered, Zimmer Creek and whumphing

Zimmer Creek
Cooke City
Code
SS-ASr-R1-D1-I
Elevation
9000
Aspect
SE
Latitude
45.09990
Longitude
-109.88400
Notes

"skier remote trigger while performing a ski cut, also in Butter. All slides [observed today] were D1, storm slab on mfcr, solar aspects

Also observed a couple large wumpfs and cracking on lower angle slopes. This new snow warmed up significantly today, pretty touchy out there."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
12.0 inches
Vertical Fall
100ft
Slab Width
25.00ft
Weak Layer Grain type
Melt-freeze crust
Slab Layer Grain Type
Precipitation Particles
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year