Gallatin National Forest Avalanche Center

An east wind 2 weeks ago may have eroded away some depth. 20 cm deep temperature is -3C.

Triggered a collapse and whumph while breaking trail across convex terrain feature. Estimated 30-40 feet wide. Dug pit approx. 10-15 feet from trigger on edge of slope slightly uphill.

scores from 3 separate ects performed side by side across slope. *first test was ECTN21 @ 178 then propagated on 161cm with 3 extra hits after standard 30 taps.