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Recreational Observation

Chair Peak/Source Lake Apron. Upper Chair Peak to large bowl uphill/due west of Source Lake.

March 17, 2019, 2:15 p.m. PST

Weather: Warm and sunny. Light winds. Temp 47 degrees Fahrenheit per Alpental mid mountain at 14:00.

Snowpack: Upper 1-1.5ft of 5 day old storm snow had turned to very wet heavy slush on solar aspects.

Area Description: Alpental Valley

Avalanches: D1 loose-wet broke off upper slopes of Chair Peak, off 100ft cliff, and stepped down/gouged apron above upper Source Lake Apron chute. Turned into D 2.5+ wet avalanche which traveled 2/3 the distance to Source Lake and filled the bowl. Debris 4-6ft tall with larger chunks. Ran from ~6000ft to ~4200ft. Narrowly missed 3 snowshoers and dog. Still plenty of similar undisturbed storm-snow turned slush and large cornices in upper slopes of Alpental Valley.

Latitude: 47.406260

Longitude: -121.385767

Did you see any avalanches? Yes

Did you trigger any avalanches? No

Was anyone caught in an Avalanche? No