20-21

Natural Avalanche in the S. Gallatin Range

SOUTHERN GALLATIN RANGE
Southern Gallatin
Code
SS-N
Aspect
E
Latitude
45.04320
Longitude
-110.96200
Notes

From an email obervation:

...widespread avalanche activity.

...central Gallatin Range, a mid elevation easterly aspect.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
Problem Type
Persistent Weak Layer
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Small, natural avalanches outside Cooke City

COOKE CITY
Cooke City
Code
SS-N
Aspect Range
W and N
Latitude
45.02020
Longitude
-109.93800
Notes

... 3 photos are from around Cooke City, all viewed from the road today (photos 1 and 3 are westerly aspects).  Photo 2 is a northerly aspect.  All mid elevations.

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
Problem Type
New Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Republic Creek, Woody Ridge Zone 2

Date
Activity
Skiing

We did a short tour yesterday in the middle of the storm into the Republic Creek drainage. Skies were overcast with light to heavy snow falling at times. Winds were gusting at times 60-80 mph, enough to blow you over if you weren't careful. Variable snowpack, wet and heavy down low until about 8800 feet then it got colder and less dense but was blowing around all over the place. The new snow was setting up very slabby in places with cracking expanding outward from the skin track and storm snow easily sliding at every kick turn. We did not dig a pit and instead opted to bail out at about 9400 feet and ski tighter trees back down to the creek bottom and home. The winds had stripped snow on the windward side with some larger drifts on the leeward side. However, in the basin, winds were coming from every direction at times. Not a very scientific observation but wanted to share what it was like in the storm up there yesterday. Caution really needs to be practiced as there are dense storm slabs sitting on large surface hoar/facets that had setup from the days of high pressure and winds may have deposited large amounts of snow in places.

Region
Cooke City
Location (from list)
Republic Creek
Observer Name
Annonymous