23-24

Rider Triggered Avalanche Bear Creek Boundary

Cedar Mtn.
Northern Madison
Code
HS-AMr-R3-D2.5-O
Elevation
9200
Aspect
N
Latitude
45.22680
Longitude
-111.51200
Notes

From IG 2/17: “Out on the cedar/ bear creek wilderness line. 10-12'x200' and probably 4-6'x400' on the one in the trees. Both remote triggered. We watched em both come down.”

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
48.0 inches
Vertical Fall
120ft
Slab Width
250.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Rider Triggered Avalanche Near Cedar Mountain

Cedar Mtn.
Northern Madison
Code
HS-AMr-R4-D3-O
Elevation
9500
Aspect
NE
Latitude
45.22680
Longitude
-111.51200
Notes

From IG 2/17: “Out on the cedar/ bear creek wilderness line. 12'x200' and probably 6'x400' on the one in the trees. Both remote triggered. We watched em both come down.”

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
4
D size
3
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
120.0 inches
Vertical Fall
200ft
Slab Width
400.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Hebgen Lake Observations

Date
Activity
Skiing

From email: "My partner and I toured up to the ridgeline overlooking Hebgen this morning, and I wanted to share our observations. With the exception of some light north winds while walking across the lake, winds were exceptionally calm the remainder of the day.

We noticed a multitude of slides on north- and east-facing slopes, many of which seemed to have been from the prior weekend. I snapped a picture of one on the opposite side of the drainage that was a couple of feet deep. Adjacent to it was some more debris.

We experienced no cracking/collapsing the entire day, which was honestly quite shocking. Given the exceptionally weak snowpack and recent avalanches, we stuck to the ridgeline and followed our uptrack down. Great turns regardless. "

Region
Lionhead Range
Location (from list)
Hebgen Lake
Observer Name
Robby Parsons