http://www.sawtoothavalanche.com Current Avalanche Advisory from the Sawtooth National Forest Avalanche Center Fri, 10 Apr 2009 07:30:00 -0700 http://www.avalanche.org/~svavctr/img/logo3.gif http://www.sawtoothavalanche.com http://www.sawtoothavalanche.com/adv_current.php Fri, 10 Apr 2009 07:30:00 -0700 Issued: 4.10.0109 by Janet Kellam

I'd like to emphasize to all backcountry travelers to be very cautious in any steep, rocky terrain for the remainder of the season at upper elevations. Our long mid winter dry spell created very weak snow near the base of the snowpack and it will remain possible to trigger a large, destructive avalanche in areas where the weak snow persists. Due to much wind accompanying our spring storms, extremely variable snow depths cover the weak layer.

Shallow areas of snow cover increase the risk of the weight of a person or machine collapsing the weak underlying snow and triggering a slide. Recent snowfall and warming temperatures also increase the risk of triggering a slide on this layer. Tracks on a...

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