Red Cone Bowl - East Ridge

Red Cone Bowl - East Ridge
Submission Info
Sunday, March 25, 2018 - 2:45pm
Red Flags: 
Recent loading by new snow, wind, or rain
Obvious avalanche path
Red Cone Bowl - East Ridge 37° 35' 49.92" N, 119° 1' 27.48" W
Snowpit Observations
More detailed information about the snowpack: 

Observer: d lewis
Loc: Red Cone Bowl
Lat/Lon:37.5972, -119.0243
Elevation: 10300 f
Aspect: NW Angle: 34°
Signs of Instability: Wind Loading
Sky Cover: BKN
Precipitation: No Precipitation
Wind Speed: Light Beaufort 
Wind Direction: W
Blowing Snow: None
Snow Depth: 309cm
New Snow Storm:11cm 
Boot Penetration: 35cm 4

Stability Tests: CT14 Q2 16cm CT15 Q2 36cm CT12 Q2 16cm CT16 Q2 16cm

Comments: Toured up to Red Cone Bowl to assess the Wind Slabs and new snow stability.

Clouds and light snow favored the Mammoth Lakes area while June Lakes north mostly clear. South of McGee, mostly clear as well. Winds: light westerly with occasional gusts of moderate, enough air movement to slow localized warming. Surface 5cm at the Twin Lakes trailhead (~8500’) moist, dry below. Melt freeze crust beginning to form on  protected slopes with direct sun exposure, up to ~10000’. New Snow, consistent 5 to 10 cm (2 to 4”) from ~8500’ to ~9000’, 10 to 20cm (4 to 8”) from ~9000 to 10, 300’. Light wind effect on sparsely treed or exposed slopes above ~9000’ where winds are channeled, especially on SE-E aspects. Snow was mostly dry above ~8500’ on shaded and/or steep slopes. Little melting and dripping from the loaded tree limbs. Settlement cones and cracks surround the trees from ~9000’ and above. Evidence of some soughing and slides during the 3/21-22 storm in steeper trees as well as the steep rocky slabs on the approach, lots of tree plops from during the cycle. Along the eastern ridgeline of Red Cone, light drifting below the ridgeline. Red Cone Bowl likely avalanched during the storm cycle based on tree damage, amount of exposed rock, and what appears to be debris flow below the recent snow. Snow profiles very similar to Hemlock Ridge (2/24). Three very subtle slabs in the upper ~40 cm of the snowpack, otherwise no other obvious weak layers. Test slopes yielded minor sluffing, which may increase somewhat with faceting.       



Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Below Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
More detailed information about the weather: 

Mostly overcast skies but partly cloudy off to the east. Cloud cover varied from partly cloudy to obscured.

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