East Slopes Central - Lake Chelan to South of I-90
March 4, 2017, 2 p.m. PST
Weather: Calm, Light Snowfall, Overcast
Snowpack: 25 cm of light density snow on top of 25 cm of medium density, weak layer identified at approx 50 cm, 10 cm of 1 finger hardness snow on top of very hard ice crust at 60 cm. Snowpit results consistently pointed to weak layer at 10 cm above ice crust.
Area Description: Red Mountain near Salmon la Sac, From the highest point of Red Mtn to the North along the ridgeline
Avalanches: While climbing on low angle slopes NW of the highest point of the Red Mtn ridgeline, we remotely triggered an R5 D3 avalanche on the W SW slope of Red Mtn. The crown was 60-90 cm and 300 m across, crossing from gully to gully. It ran full path at approx 300m. We dug a pit on a similar test slope and found the weak layer to fail at ECTN13. An R2 D2 avalanche was also observed on a N NW slope in the drainage West of Red Mtn. Most likely remotely triggered by snowmobile.
Observation by Nick Webb
Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an Avalanche? No