Northern Gallatin

Skier triggered loose snow and natural wind slabs at Bridger

Bridger Peak
Bridger Range
Code
L-R1-D1.5
Elevation
8300
Aspect
E
Latitude
45.77010
Longitude
-110.94000
Notes

Skiers saw natural soft slabs that broke below the cornice along the ridge near Slushman's lift.

Another group reported: "I spotted a buddy skiing the lower nose and he started a couple of slow moving sluffs, well in his wake... We did see a recent point release in that zone, from a ski track, that ran over 200 feet in steep terrain."

Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
R size
1
D size
1.5
Problem Type
New Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
19-20

Skier triggered dry loose at Beehive

Beehive Basin
Northern Madison
Code
L-ASc-R1-D1-O
Elevation
9000
Aspect
W
Latitude
45.34070
Longitude
-111.39100
Notes

We were able to trigger dry loose avalanche in the 3-5" of new snow that ran on firm underlying crusts.

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
Trigger
Skier
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
1
D size
1
Bed Surface
O - Old snow
Problem Type
New Snow
Images
Skier triggered dry loose
Small skier triggered dry loose
Attached Videos
New Snow Instabilities, Beehive - 30 Nov 2019
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
19-20

Obs from skiers in Hyalite: "A pit on a SE aspect at 9600' [near Flanders] was 75cm deep and looked pretty good, except for the crust near the surface that's sitting on top of some facets, which failed as I isolated the column. I did not notice any cracking, collapsing, or recent activity on this layer, but it will likely be something to keep in mind as we get more snow. We noticed the same crust atop near-surface facets on a N aspect in Maid of the Mist last weekend, although its crustiness varies, depending on aspect." Photo: S. Reinsel


Forecast link: GNFAC Avalanche Forecast for Sat Nov 30, 2019GNFAC Avalanche Forecast for Sun Dec 1, 2019
Northern Gallatin, 2019-11-30
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