Southern Gallatin

Remotely Triggered Avalanche in Specimen Creek

Specimen Creek
Southern Gallatin
Code
Latitude
45.02650
Longitude
-111.04800
Notes

Many ridgelines had been scoured down to the grass from yesterday's winds. HS was around 100cm around 8k feet and significantly shallower at lower elevations. New snow totals from the past couple of days was around 20-30cm. We experienced a remarkable number of thunderous collapses throughout the day (I lost count), one of which triggered an avalanche into Specimen Creek while we were in the flats. 

 

Number of slides
1
Number caught
0
Number buried
0
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Specimen Creek Obs

Date
Activity
Skiing

Here are some observations from our tour in Specimen Creek this morning. 

Winds remained steady throughout the day and were blowing from the southern half of the compass. Many ridgelines had been scoured down to the grass from yesterday's winds. HS was around 100cm around 8k feet and significantly shallower at lower elevations. New snow totals from the past couple of days was around 20-30cm. We experienced a remarkable number of thunderous collapses throughout the day (I lost count), one of which triggered an avalanche into Specimen Creek while we were in the flats. See attached photo.

 

I'd give this area a few more good storms before the touring is worth it back there. Lots of tree-dodging!

 

Region
Southern Gallatin
Location (from list)
Specimen Creek
Observer Name
R Parsons

Widespread Collapsing in Cabin Ck

Date
Activity
Snowmobiling

We rode to the divide between Cabin and Teepee Creeks and then the fog/clouds set in and we couldn't go higher or further out.

From the moment we left the trail there was WIDESPREAD collapsing all day long. Snowpits were consistently 3-4 feet deep and the weak layer usually a foot above the ground. At higher elevations, I suspect that the weak layer is closer to 2 feet above the ground. Because of the widespread collapsing and very bad visibility, we were hyper-aware of slope angles so that we didn't inadvertently get on or under avalanche terrain.

Small slopes at low elevations were avalanching including some along Hwy 191 in YNP. It's always a bad sign when road cuts are avalanching. 

We stayed away from ALL AVALANCHE TERRAIN.

The good news - the powder is incredible, the coverage is excellent, and this snow is exactly what we need to heal the weak layer. Unfortunately, avalanche conditions have to get worse before they get better.

 

Region
Southern Madison
Location (from list)
Cabin Creek
Observer Name
Staples, A. Case, R Searle

Avalanche above Quake Lake

Date

There was a natural avalanche on the landslide face above quake lake. The avalanche failed on a weak layers near the ground and broke several hundred feet wide. 

Region
Lionhead Range
Location (from list)
Quake Lake
Observer Name
Nick Sramek

Remote trigger cabin creek

Cabin Creek
Southern Gallatin
Code
SS-AMc-R3-D2-O
Latitude
44.89490
Longitude
-111.22800
Notes

Dug a small test pit. Unprofessional observation ectp 10 on the persistent weak layer seen across the advisory area. On our way out near the cabin I cut a line close to a creek to see if I could trigger something. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Snowmobile
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
3
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Slab
Slab Thickness
24.0 inches
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year