Avalanche: Turnagain

Location: Pete's North

Route & General Observations

Pete’s North to 2000′

Avalanche Details
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Trigger UnknownRemote Trigger Unknown
Avalanche Type UnknownAspect Unknown
ElevationunknownSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Rununknown  
Red Flags
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Observer Comments

Avalanches from the past week - including several large slabs on a SE aspect of 4940' and one on a SW aspect of Lipps - are pictured below. Some activity appeared to be fairly shallow and fresh from the past few days, while other crowns were deeper, and partly blown/snowed in. Propagation for some slides was fairly wide, particularly for a series of recent slides above treeline on a SW aspect of Pete's North. Other previously reported activity is easy to see along the highway; small debris piles were also evident in the main portion of Todd's run and below the steep chutes leading into Todds as well.

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

CLEAR, CALM, and COLD! -8f at the car both morning and late afternoon, but noticeably warmer up high.

Snow surface

2-4mm surface hoar was noticeable along the surface most of the time, though down low it appeared mainly to be stellars that were sparkling.
At the 650' in elevation (the parking lot) there is a 5mm thick fragile melt freeze crust, 1" below the surface. Ski penetration of 6" fairly consistently to 2000'


The snowpack is somewhat thinner at the far south end of the pass, with HS=60cm at the parking lot increasing to 100-120cm by 2000'
See below for pit structure and test results in a clearing at 1900'. Overall, ski pole probing revealed that the Thanksgiving Crust complex at the far south end of Turnagain Pass is much more fragile than near Tincan/Eddies and Seattle Ridge near the uptrack.

Photos & Video
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