Professional Observer:   Kevin Wright
Location: Turnagain -   Turnagain Pass
Date: Dec 28th, 2012
Natural avalanche activity
Friday the 28th was a great day to look at the aftermath of the storm. The
patterns we saw...
- Widespread avalanche activity on slopes that rarely avalanche, from 1000-3500
feet elevation, all aspects (but most obvious on west and south).
- The east face of Seattle ridge was largely wind scoured. Crowns up high seem
to be blown in and hard to see.
- Some activity at high elevation may be invisible if it slid early in the storm
and filled back in by later snowfall.
- Crowns were consistently over 3 feet deep, pulling all the December snow,
failing on the extremely weak snow from early winter.
- Lipps in the second picture was a great example of large propagation that is
possible with a weak layer of this type.
|Photo 1. Eddies natural avalanches|
|Photo 2. Lipps natural avalanche on south face. The entire south face section in this photo avalanched during the storm. |
|Lat: 60.7357 Long: -149.2266|
Professional observers are employees of organizations specializing in avalanche forecasting, mitigation and/or education. Some examples include: CNFAIC staff, AKDOT and AKRR avalanche program employees, AAS/AAI/AIARE level 2 and above avalanche instructors.
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