Avalanche: Turnagain

Location: Sunburst

Route & General Observations

Sunburst to the weather station, via Taylor Pass

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 GlideAspect Unknown
ElevationunknownSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Rununknown  
Avalanche Details

At least one new glide avalanche from the past 24 hours on Seattle Ridge, just south of the large glide over the repeat offender path/uptrack. This glide stepped down, wider than the one previously reported - see photos below. We also suspected a new release on a SW aspect of 4940', and the sun was still heating things up when we left around 4 PM.

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

On top of the Seattle Ridge glide/stepdown avalanche from the past 24 hours, recent glide/wet loose activity below Tincan Proper/Library. While there are lots of cracks along the library, there have been fewer glide avalanches on the library compared to below Tincan Proper. A dirty debris pile also ran on a SE aspect on the far end of the Library, onto the Kickstep pocket glacier.

A fairly large debris pile was below a steep SW aspect, under a corniced ridge roughly between Kickstep and Pastoral. Hard to say what avalanche problem produced this debris from our view!

Finally, two wet loose slides that appeared to have occurred since Friday ran from near ridgeline on a SW aspect of sunburst (pictured below).

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

Broken thin clouds transitioning to few clouds by 1 PM.
EXTREMELY SUNNY. Temps in the 30s down low, 20s up high.
Occasional light NE winds at Taylor Pass/ridgeline.

Snow surface

The sun was working the surface today...

In the AM, supportable crust with a dusting of new recent snow on all aspects to the road, with ski pen between 0 - 1".

1000 - 1500' @ 4 PM: Small steep southerly rollovers were going isothermal below 1500', while shaded northerly features at this lower elevation were still dry and stout.

1500 - 2500' @ 4 PM: Lower angle SW aspects had a little softening from the sun, but low angle West aspects were still quite stout and crunchy.

2500 - 3800' @ 4 PM: By staying on a steep, south aspect feature, we found 1-2" of moist to wet small melt freeze grains, capped by a dusting of new snow, sitting on a thick supportable layer. Towards the bottom of the run on a ~35 degree SW aspect, the sun hadn't soften the surface as much as above.


No formal stability tests.

Photos & Video
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