| Trigger | Natural | Remote Trigger | 0 |
| Avalanche Type | Unknown | Aspect | Northwest |
| Elevation | 2500ft | Slope Angle | unknown |
| Crown Depth | unknown | Width | 200ft |
| Vertical Run | unknown |
Avalanche: Turnagain
Location: Tincan Trees
Set a skin track from Center Ridge to Tincan Trees up to 1800 ft on Tincan’s W ridge. Tons of whumphing on entire tour, shooting cracks in lower elevations, and many natural avalanches observed (from storm or after storm).
Avalanche Details
Large, probably natural avalanche, on Sunburst that started near the lower ridge and propagated quite far, ripping down to expose alders.
Noticed small avalanche on Magnum on same aspect and approx. elevation.
Small D1 natural observed near powerline not far from Center Ridge pull-out that appeared to have released in the storm.
Obvious signs of instability
| Recent Avalanches? | Yes |
| Collapsing (Whumphing)? | Yes |
| Cracking (Shooting cracks)? | Yes |
Observer Comments
Experienced a TON of whumping both while breaking trail, and while skiing down our existing skin track. What was so interesting about this, is that we had whumphing in areas we had both previously skinned up. On one slope in Tincan Trees we experienced a double whumph in the same spot where we believe multiple weak layers (likely BSH) collapsed one after another. Shooting cracks occurred near and not far from the Center Ridge pull-out, with a few more at lower elevations when stomping on test
Weather
Center Ridge parking lot at noon - broken skies, no wind, and no precip.
1600 ft in Tincan Trees at 1:30 pm - overcast skies, light winds, S-1.
1800 ft in Tincan Trees at 2:30 pm - broken skies, calm to light winds from the North, no precip.
Center Ridge Parking lot at 4 pm - broken skies, no wind, and no precip.
Snow surface
20+ inches of wet, heavy new snow everywhere. Difficult trail breaking. Ski penetration - boot top to knee, Boot penetration - hip.
Snowpack
Dug a snowpit in Tincan Trees at 3 pm at 1800 ft on a NW aspect. 20 degree incline. HS = 155 cm. Found 3 layers of buried surface hoar. Top layer of BSH 3-6mm crystals. CT15 45 cm down from surface collapsed on a density change in the new snow. ECTP 13, 15 SC down 83 cm on the closest BSH to the surface. PST 25/100 END. Full pit profile to ground shown below.
155
F
110
4F
75
4F
72
4F BSH
70
1F
65
BSH
64
1F+
60
P
50
1F
40 BSH
4F
35
4F
30
1F
10 K
1F
0
Sunburst avalanche
Natural avalanche under powerline
Pit wall
3 BSH layers