Avalanche: Turnagain

Location: Seattle Ridge

Route & General Observations

Rode up the common up-track to the weather station and back. Looked around for any recent avalanche activity.
Several natural slab avalanches from the storm, mostly in terrain across Seattle Creek. No human triggered avalanches that we know of. Hardly any steep slopes were tested, folks mainly having a good time in the mellow terrain.

Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger NaturalRemote Trigger Unknown
Avalanche Type UnknownAspect Unknown
ElevationunknownSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Rununknown  
Avalanche Details

Several Natural avalanches from Thursday's storm or shortly after.

Zero Bowl (just on the opposite side of the up-track): what looked like a cornice fall that triggered a storm slab.
Several small wind slabs in the 6-12" range that did not go very far or wide.
Across Seattle Ck drainage were much more ominous looking natural avalanches from the tail end of Thursday's storm. These were in the 1500' to 3000' elevation range.
See photos.

Tincan - there was what looked to be a storm slab avalanche in the lower Tincan Trees on the north end. No photo.

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)?No
Cracking (Shooting cracks)?No
Observer Comments

Recent avalanches were the red flags we got. No cracking/collapsing seen or felt.
Some very shallow and small new wind slabs were seen (~6" deep).

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

Partly sunny skies.
Winds were gusty from the NW along the ridge (~5mph, gusts to ~15).
Chilly... around 10F or so.

Snow surface

Two feet of settling storm snow from Thursday night's storm.
Wind effect along the ridge... soft sastrugi...


We dug one pit to look at the new storm snow.
SE aspect at 2,200' - total snow depth was 10-11 feet.
Snow depth above the facets was 5-6' and the Halloween crust was 6' deep.
We only tested the top 4' of the snowpack and had no results (EXTX). The top 2 feet of new storm snow is soft (fist hard) and sits over a stiffer layer of storm snow from 4-5 days ago. The new storm snow looks to have bonded with the other settling snow from earlier in the week. Save for any wind slabs... we only saw very small ones, but I'm sure there are larger ones out there.

Photos & Video
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