Avalanche: Turnagain

Location: Seattle Ridge - avalanches on the front and back side

Route & General Observations

Up to 9 slab avalanches were triggered by snowmachiners on both the front and back sides of Seattle Ridge on Thursday, March 14th. See photos and video below sent in by various individuals who were in the area. A big thank you to these folks! These slabs were mostly remotely triggered and as far as we know, no one was caught carried or buried.

The avalanches occurred on the first sunny day after a 3-day storm deposited 3-4 feet of new snow.

Avalanche Details
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Trigger UnknownRemote Trigger Unknown
Avalanche Type UnknownAspect Unknown
ElevationunknownSlope Angleunknown
Crown DepthunknownWidthunknown
Vertical Rununknown  
Avalanche Details

Many avalanches triggered on all aspects of Seattle Ridge.

These appear to all be composed of the new snow that fell between March 11 to 13th. The failure layer is likely old weak snow just under the storm snow. Crown depths are around 3 feet deep and slabs propagated around 100-200' wide.

Photos & Video
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