Valanga

Big Chief Ridge

Josh HirshbergStevens Pass
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Foto dell’osservazione 1Foto dell’osservazione 2Foto dell’osservazione 3

Quick report

A pleasant, cool day. Minimal hazard or current snowpack concerns.
The goal was to get profiles as high in the terrain as possible during a morning tour and track the 2/13 interface and crusts in the upper snowpack. The snow in the upper snowpack is impressively weak, and facets are well-developed, especially at the 2/13 interface and adjacent to the 2/8, 2/7 crust and other melt-form layers in the top 70cm.

Ski cuts on 40-degree northerly slopes could barely begin to initiate the top ~15cm of uncohesive, dry snow. I couldn't get it to move more than a couple of feet, and it wouldn't entrain snow nor become an avalanche.

Weather

Cloud Cover
broken
Wind Loading
none
Recent Snowfall
2
Snow Avail For Transport
small smounts

Scattered clouds in the AM became obscured by 12p. A dusting of snow overnight with intermittent flurries during the day. Calm winds. Cold temperatures

Snowpack

Surfaces
Dry, precip particles

Profile
Big Chief Ridge, SE, 5,500ft
0-1cm: F hard, stellars (PP), dry
1-3cm: F+ hard, MF/FC, moist
3-4cm: 1F hard, MFc , moist
4-7cm: 4F hard, FC (1.0mm), dry
7-13cm: P+ hard, MFcr, dry

Profile
Big Chief Ridge, ENE, 5620ft
HS 215cm, Boot Pen 40cm
↓15-19cm: 4F hard, facets (1-2mm), Feb 13
↓19-21cm: 1F+ hard, crust, Feb 8
↓21-24cm:  F+ hard, facets (1mm)
↓24-34cm: P+ hard, crust/MF, Feb 7 and beyond

Avalanche

None