Lone Lake Cirque
Northern Madison
Code
HS-ARu-R4-D2.5
Latitude
45.27710
Longitude
-111.46400
Notes
There was a large, deep slab avalanche snowboard triggered in Lone Lake Cirque this afternoon (3/30). The
slide ripped in a secondary start zone below ridgetop, and ran far into the flats, and may have run a bit uphill, where it encountered the rock glacier moraine in the runout. It looks to be a R4, D2.5. Snowboarder walked away unharmed.
Number caught
1
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowboarder
Trigger Modifier
u-An unintentional release
R size
4
D size
2.5
Images
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year