Sunlight Basin
Southern Madison
Code
SS-AFr-R2-D2-O
Elevation
9500
Aspect
SE
Aspect Range
E-SE
Latitude
44.97560
Longitude
-111.31300
Notes
We triggered these avalanches remotely, about 50 feet above the crown up on the ridge. Each crown was 1-2' deep, 100' wide, and both slides ran between 200 and 300 vertical feet through trees and cliffs. The slides failed on a 40 cm thick layer of depth hoar, which composed half of the snowpack. Photo: GNFAC
Multiple Avalanches
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Soft slab avalanche
Trigger
Foot penetration
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
18.0 centimeters
Vertical Fall
300ft
Slab Width
100.00ft
Weak Layer Grain type
Large striated crystals
Weak Layer grain size
4.00mm
Weak Layer Hardness
F-
Slab Layer Grain Type
Decomposing and Fragmented precipitation particles
Slab Layer Hardness
F+
Attached Videos
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year