Avalanche: Turnagain

Location: Tincan, Seattle Ridge

Date:
Observer:
Route & General Observations

There was close to 1.5′ of new snow near tree line at Tincan today. There were multiple soft slab avalanches at the new/old interface on west to southwest aspects on Tincan, and east aspects on Seattle Ridge. It was a little concerning to see a large slab avalanche that failed at or near the ground right below Tincan Proper.

Avalanche Details
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Trigger UnknownAvalanche Type Soft Slab
Aspect West SouthwestElevation 2500ft
Slope AngleunknownCrown Depth 18in
Width 50ftVertical Run 100ft
Avalanche Details

Three avalanches more or less on the same slope, most likely released at the same time. Many similar avalanches on Seattle Ridge.

There was also a large slab avalanche that failed near the ground below Tincan Proper. SS-N-G-R1-D2.5, 100' wide. I couldn't see how far it ran but I'd guess it probably went close to the valley bottom given the depth and how steep that terrain is on the south facing slopes.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?Yes
Cracking (Shooting cracks)?No
Observer Comments

I got a few smaller collapses at lower elevations. I think it was on that layer of surface hoar that just got buried.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Sky was scattered to overcast with light winds out of the east. A few flurries, but the snowfall had tapered off by this afternoon and visibility was actually pretty good.

Snow surface

Around a foot of new snow at the parking lot, close to 1.5' at 2500'.

Snowpack

Got a few small collapses at lower elevation.