Northern Gallatin

From IG message: "5' thick wind slab just behind little bear remote triggered riding along the ridge." @skidooin_it

Northern Gallatin, 2019-12-22

Shallow wind slab avalanches in Hyalite

Maid of the Mist
Northern Gallatin
Code
SS-N
Aspect
E
Latitude
45.41640
Longitude
-110.97000
Notes

1. From an email: The wind sure moved snow around up Hyalite last night, and our party observed several small to medium-sized releases that occured on a heavily-loaded east aspect overnight. None stepped down in the snowpack, but they certainly could have taken a person for a ride. Overalll, stability seemed to be good, with the exception of isolated wind-loaded areas.

2. From IG: Couple of small natural wind slabs around 10,200’ NE in Hyalite. Not sure exactly how recent. Played it conservative and chose to stay off a similar slope.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
Problem Type
Wind-Drifted Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

From an email, "... our party observed several small to medium-sized releases that occured on a heavily-loaded east aspect overnight. None stepped down in the snowpack, but they certainly could have taken a person for a ride. Overalll, stability seemed to be good, with the exception of isolated wind-loaded areas." Photo S. Reinsel

Northern Gallatin, 2019-12-18

Small slide in Hyalite

Divide Peak
Northern Gallatin
Code
SS-N-R1-D1-U
Latitude
45.40290
Longitude
-110.97600
Notes

While on a tour in Hyalite yesterday, we were able to find stable snow on a south aspect at 9500 feet. Although we found no propagation in our ECT, we observed a defined crust layer about 2.5 feet down which was well bonded to snow above. On some steeper pitches near rocks bands, we observed top layer slough that moved naturally. We also observed a small crown from a day or two ago that broke between two buried rocks and only ran about 50 feet down slope.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Bed Surface
U - Unknown
Slab Thickness
12.0 inches
Vertical Fall
50ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year