23-24

Deep Slab Shoulder of Republic Mountain

Republic Mountain
Cooke City
Code
HS-N-O
Aspect
N
Latitude
45.00030
Longitude
-109.95400
Notes

From obs: "Observed Deep Slab avalanche on the Shoulder of Republic Mountain today. Went to ground runout/could see dirt throughout runout." 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Avalanche in Hourglass

Date

From IG 3/2: A skier triggered this slide in the Bridgers.

Region
Bridger Range
Location (from list)
Hourglass Chute

Rider Triggered Avalanches in Cooke City

Lulu Pass
Cooke City
Code
AMr
Latitude
45.07090
Longitude
-109.95800
Notes

From obs: "Two remote triggers from about 250ft away on a slope up lulu pass. A lot new snow and everything was sliding above 30 degrees." 

Number of slides
2
Number caught
0
Number buried
0
Trigger
Snowmobile
Trigger Modifier
r-A remote avalanche released by the indicated trigger
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Avalanche on Henderson Mountain

Date

From email: "We were 3/4 the way up lulu today on the west side of the creek under the Henderson Bench. It broke1/2 way down off the top ridge and ran all the way to the creek. Debris pile 20+ feet. Location matches super slide of 5-6 years ago, we were accros the drainage sitting on the "match sticks" layed out on the trail thru lulu. Ran into the Av center team about an hour before the incident, and as always thanked them for being the best and keeping us all informed! Nobody caught, remote trigged, but we were luckily across the drainage when it went!"

Region
Cooke City
Location (from list)
Henderson Mountain
Observer Name
Jake Tocco

Bridger Side Country Observations

Date
Activity
Skiing

From email: "New Obs from Bridger side country. Toured Texas Meadows over to the playground. Saw some small point releases in new snow on south and southwest facing aspects. At the top of the playground I dug a small hand pit. I suspect it was in a shallow snow pack area, as I was able to dig to rock before running out of arm to dig. The snow was getting wet the whole way through (could make a snowball even out of the snow at the ground level where I was looking for buried persistent weak layers). On the southern aspect of the playground we saw some roller balls that had been covered by the new snow yesterday and today. The only places we saw evidence of wind on our tour was just past the bridger boundary. "

Region
Bridger Range
Location (from list)
Texas Meadow
Observer Name
Amanda Kautzer

A couple recent avalanches

Date
Activity
Snowmobiling

We rode into Tepee Basin and saw two recent avalanches. One looked like it happened this morning on a treed ridgeline, 1-1.5' deep 150-200' wide. The other looked like it maybe happened yesterday, on a heavily wind-loaded slope below some cornices, 2-2.5' deep and 250-300' wide. We had brief good visibility of the major avalanche terrain in the upper basin and didn't see any other slides. We measured 12" of snow = 1.5" of SWE that fell since Thursday. Snow was drifted near ridgelines and in the highest meadows. There was some cracking in the new snow around sled skis, but it was minimal.

Region
Southern Madison
Location (from list)
Tepee Basin
Observer Name
Alex Marienthal

Unstable test score - Texas Meadows

Date
Activity
Skiing

Unstable result on the S shoulder of lower Texas Meadows. ECTP 12 - 40 CM down on a crust facet combo from the last warm up. E facing 23 degree slope, 7639 ft.

Region
Bridger Range
Location (from list)
Texas Meadow
Observer Name
Christopher Pruden

Many avalanches north of Cooke city

Date
Activity
Skiing

Went out to butter from the yurt with my client today. Around green lake and Zimmer creek nearly everything over 30 degrees slid on the new/old interface. New snow didn’t bond well and there is a very touch storm slab. Lots of cr co on everything low angle  

Also saw a couple hard slab D2 avalanches. One was skiers left of butter, couldn’t quite see the path but took a picture of the run out. The other was in the boulder field of cardiac hill. 
 

 

Region
Cooke City
Location (from list)
Zimmer Creek
Observer Name
Jake Mundt