18-19

Natural avalanche in the Northern Bridgers

BRIDGER RANGE
Bridger Range
Code
SS-N-R1-D1-I
Elevation
7800
Latitude
45.92170
Longitude
-110.98500
Notes

Skiers in the northern Bridgers noticed this natural slab avalanche. From an email: "Extremely weak, faceted snowpack on w-e slopes all the way up to 8000ft or so. Widespread cracking and collapsing, basically a 14in storm slab on top of total garbage. Observed a good size natural in steep, north facing terrain at about 7800ft, starting zone was a big slough fan and broke what looked like 2-3ft deep, presumably on the dry spell facets."

 

Number of slides
1
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Collapsing and cracking of the new snow in Hyalite

Maid of the Mist
Northern Gallatin
Code
SS-ARc-R1-D1-I
Latitude
45.41640
Longitude
-110.97000
Notes

Riders in Hyalite observed collapsing and propagating of the new snow near Maid of the Mist. They also found unstable test results (ECTP7).

Number of slides
1
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Soft slab avalanche
Trigger
Snowboarder
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Layer Grain Type
Precipitation Particles
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

New snow Instabilites in Cooke City

Woody Ridge
Cooke City
Code
SS-AS-R1-D1-I
Latitude
44.97390
Longitude
-109.92400
Notes

This small slab was triggered by a skier and failed at the new snow interface.

Number of slides
1
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

New snow avalanches in Hyalite

Mt Blackmore
Northern Gallatin
Code
SS-ASc-R1-D1-I
Latitude
45.44410
Longitude
-111.00300
Notes

Skiers near Blackmore found the new snow failing at the new/old snow interface. They were able to trigger these soft slabs with a ski pole whack.

Number of slides
1
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Layer Grain Type
Precipitation Particles
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year