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Recreational Observation

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

Latitude: 47.397263

Longitude: -121.143537

Did you see any avalanches? Yes

Did you trigger any avalanches? Yes

Was anyone caught in an Avalanche? No