| Trigger | Natural | Remote Trigger | 0 |
| Avalanche Type | Unknown | Aspect | West Southwest |
| Elevation | unknown | Slope Angle | unknown |
| Crown Depth | unknown | Width | unknown |
| Vertical Run | unknown |
Avalanche: Summit
Location: Tenderfoot
Toured the standard Tenderfoot up-track to 3300′.
While driving through Turnagain Pass we observed a large new glide avalanche on the WSW face of Eddies.
Obvious scouring and loading from the last storm on February 4/5 in the Alpine. Persistent weak layers are still present in the snowpack.
Avalanche Details
Recent glide release, sometime late 2/10-early 2/11
Observer Comments
Significant roller balls, surface snow was becoming wetter and more cohesive
Weather
Mixture of overcast and obscured.
Light snow/rain. Rain line was around 2100'
Temps in 30s
ENE winds 15-25, gusty around 2pm.
Snow surface
1200'-2100' rain saturated snow 1-2" deep with moist snow below.
2100'-3300' 1-3" of moist snow over drier snow (8-10" settled storm)
Wind was creating roller balls around 2500', ridgeline snow wasn't being transported until around 3000'
Snowpack
Pit #1: 2300' West aspect, 28 degree slope, HS=185, dug to 135 cm. We found buried surface hoar (BSH) 40 cm below the surface (interface between the February 4/5 storm an older snow (ECTN 15, CT 20) There is another layer of (BSH) 70 cm below the surface. This layer was not reactive in tests.
Pit #2: 3300' South aspect 24 degree slope, HS=80. Multiple layers of wind compacted snow over 10-20 cm of facets, 1-2mm.
@ 40 cm below surface: ECTP 21 SC, CT 16 SC x2 on the interface between Feb. 4/5 storm and old snow (small facets= .5)
No hand pit or test slope results.
Glide avalanche on Eddies
Pit #1: Buried surface hoar, 70 cm below surface
Pit # 1: Buried surface hoar grain, 70 cm below surface
Wind transport
Skier triggered roller balls
Pit # 2, 3300'
Pit # 1, 2300'