Snowmobile triggered Avalanches (2), McAtee Basin

McAtee Basin
Northern Madison
Code
HS-AMu-R3-D2-O
Elevation
9600
Aspect
NE
Latitude
45.17690
Longitude
-111.45200
Notes

From obs: "Triggered a large slide with a snowmobile. Went all the way to the ground. Crown seemed to range anywhere from maybe 3 ft to 10 ft. Large slabs of snow broke free and slid for about 100 yards."

A second sled-triggered slide occurred Saturday (2/20) on the ESE facing slope at the entrance to McAtee Basin. SS-AMu-R3-D2-O

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
u-An unintentional release
R size
3
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
60.0 inches
Vertical Fall
100ft
Slab Width
200.00ft
Weak Layer Grain type
Depth Hoar
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year