21-22
Many small avalanches in Tepee Basin
Tepee Basin
Southern Madison
Code
SS-N-R1-D1-O
Aspect
E
Latitude
44.90410
Longitude
-111.18500
Notes
There were many natural avalanches that were breaking on facets near the ground (4-6mm). The 3 feet of snow that fell created unstable conditions and avalanched during the HIGH danger. Most slides were less than 100 feet wide. By GNFAC.
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Weak Layer Grain type
Solid faceted particles
Slab Layer Grain Size
4.00mm
Slab Layer Hardness
1F
Attached Videos
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
Bare ground on the ridge between Tepee Basin and Bacon Rind Creek. Nearby we found 4 ft deep drifts. 12/22/21. Photo: GNFAC
An avalanche in Tepee Basin appears to have failed within or under the new snow around 12/15/21. Photo taken 12/22/21.
Photo: GNFAC
Avalanche Details: Many small avalanches in Tepee Basin
Forecast link: GNFAC Avalanche Forecast for Fri Dec 24, 2021GNFAC Avalanche Forecast for Sat Dec 25, 2021
Southern Madison, 2021-12-22
Forecast link: GNFAC Avalanche Forecast for Fri Dec 24, 2021GNFAC Avalanche Forecast for Sat Dec 25, 2021
An avalanche in Tepee Basin that broke under new snow on facets near the ground. Likely occurred on 12/15/21. Photo taken 12/22/21.
Photo: GNFAC
Avalanche Details: Many small avalanches in Tepee Basin
Forecast link: GNFAC Avalanche Forecast for Thu Dec 23, 2021GNFAC Avalanche Forecast for Sat Dec 25, 2021
Southern Madison, 2021-12-22
Forecast link: GNFAC Avalanche Forecast for Thu Dec 23, 2021GNFAC Avalanche Forecast for Sat Dec 25, 2021
Digging a snowpit in 4 feet of drifted snow in Tepee Basin (12/22/21). Photo: GNFAC
Forecast link: GNFAC Avalanche Forecast for Thu Dec 23, 2021
Riders in the Lionhead area observed 5-6 naturally occurring avalanches that likely failed on 12/15 at the tail end of a 3' snowstorm. Photo: S. Tyson
Avalanche Details: Airplane Bowl natural avalanche
Lionhead Range, 2021-12-22
Avalanche Details: Many small avalanches in Tepee Basin
Southern Madison, 2021-12-22