A snowmobiler triggered this avalanche on Monday (2/1/2021) at Lionhead. No one was caught. Photo: Anonymous
20-21
A snowmobiler triggered this avalanche on Monday (2/1/2021) at Lionhead. No one was caught. Photo: Anonymous
Avalanche Details: Snowmobiler triggered avalanche, Lionhead
Forecast link: GNFAC Avalanche Forecast for Fri Feb 5, 2021
Lionhead Range, 2021-02-01
Forecast link: GNFAC Avalanche Forecast for Fri Feb 5, 2021
Major avalanche cycle
LIONHEAD AREA
Lionhead Range
Code
SS-N
Latitude
44.72920
Longitude
-111.32300
Notes
From GNFAC field day on 2/1:
Many natural avalanches were triggered by a large snowstorm that dropped 2 feet of snow on 1/29 and 1/30. The slides broke on numerous weak layers: under the snow, a surface hoar layer mid-pack and sugary facets at the ground (depth hoar).
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
Problem Type
Persistent Weak Layer
Images
Attached Videos
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
Avalanche Details: Major avalanche cycle
Lionhead Range, 2021-02-01
This small avalanche was below the corner of Lionhead peak. It was one of the smaller slides during the avalanche cycle that occurred 1/29 and 1/30. Photo: GNFAC
Avalanche Details: Major avalanche cycle
Lionhead Range, 2021-02-01
The avalanche broke in the new snow, but stepped down into deeper layers (sugary facets) mid-path. This can occur when there are multiple weak layers in the snowpack. Photo: GNFAC
Avalanche Details: Major avalanche cycle
Lionhead Range, 2021-02-01
Every path along the shoulder of Targhee Peak (Lionhead area) avalanched naturally during the storm 1/29 and 1/30. Photo: GNFAC
Avalanche Details: Major avalanche cycle
Lionhead Range, 2021-02-01
This steep north facing slope avalanched about 3 weeks ago on depth hoar when a snowmobiler triggered it. It got reloaded with new snow and wind drifts and avalanched a second time! Photo: GNFAC
Avalanche Details: Major avalanche cycle
Lionhead Range, 2021-02-01
This natural avalanche occured on a NE facing slope at 8600". It was 2' deep, 500' wide and 250' vertical. The avalanche broke on a thin layer of facets during the storm. SS-N-R3-D2-O. Photo: GNFAC
On the north end of Lionhead Ridge is Airplane Bowl. The crown line extends across the entire bowl on the right with a separate avalanche on the left. Photo: GNFAC
Avalanche Details: Major avalanche cycle
Lionhead Range, 2021-02-01