20-21

Snowmobile Triggered Slide on Lionhead Ridge

Lionhead Ridge
Lionhead Range
Code
SS-AMu-R3-D2-O
Elevation
9500
Aspect
NE
Latitude
44.71450
Longitude
-111.31800
Notes

Snowmobile triggered slide on Lionhead Ridge in Upper Watkins drainage on 2/11/2021. Appears to have broken on weak snow near the ground. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Snowmobile
Trigger Modifier
u-An unintentional release
R size
3
D size
2
Bed Surface
O - Old snow
Images
Lionhead snowmobile triggered slide
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
20-21

Mt Ellis

Date
Activity
Skiing

I took a tour up Ellis today, and things haven’t changed since you guys were up there. A pit at 7400’ on the ascent had HS 105 and ECTP15 on depth hoar 20-30 cm off the ground. The surface conditions were excellent; subsurface not so much. I don’t imagine that will change very quickly. There was a light east wind on the ridgeline, but it wasn’t transporting much of anything.

Region
Northern Gallatin
Location (from list)
Mt Ellis
Observer Name
Sam Reinsel

Natural Avalanche on Lionhead Ridge

Watkins Creek
Lionhead Range
Code
SS-N-R3-D2
Latitude
44.75360
Longitude
-111.33000
Notes

Natural avalanche on Lionhead Ridge in upper Watkins Creek. Likely broke on Sunday 2/7. Appears to have failed on weak snow near the ground.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
3
D size
2
Images
Avalanche in Upper Watkins Creek
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
20-21
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