Red Cone Bowl

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SNOWPACK OBSERVATION
Red Cone Bowl
Submission Info
Forecaster
Friday, April 14, 2017 - 2:45pm
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Obvious avalanche path
Red Cone Bowl 37° 35' 45.06" N, 119° 1' 32.34" W
Snowpit Observations
More detailed information about the snowpack: 

Observer: doug lewis, Eastern Sierra Avalanche Center

Apr 14, 2017, 2:00 PM

Loc: Red Cone

Lat/Lon:37.5958, -119.0256

Elevation: 10250 f

Aspect: NE

Angle: 33°

Signs of Instability: Recent Avalanches, Wind Loading

Sky Cover: CLR

Wind Speed: Light, subjective

Wind Direction: SW

Current Temp:1.5°C

Blowing Snow: None

New Snow Storm:30cm

Snow Temperature 20cm:-5° C

Boot Penetration: 25cm 4 Stability Tests: STM Q2 30cm STC Q1 10cm CTV Q1 5cm CTV Q1 5cm Failed on 2mm graupel/ rimed irregulars

Comments: Toured up to Red Cone to assess the new snow along the Crest.

1100: Elevation 8600’, ATemp 2 C, snow dry in the shade, top 2 cm becoming moist in the sun. Light westerly winds, Sky, Clr. ~15cm New snow.

12:00 Elevation 9400’, ATemp 1.7 C, Snow Temp -2, snow dry in the shade, top 2 cm becoming moist in the sun. Light westerly winds, Sky, Clr. ~20 cm New snow.

1:30 Elevation 10,242’, ATemp 1.5, snow dry in the shade, top 2 cm becoming moist in the sun on anything but N-NE aspects. Light westerly winds, Sky, Clr. ~15cm New snow. Observed two natural avalanches along the Crest directly underneath a couple of large cornices. R1, D2 x2. Snowpit: dug a snowpit below the summit ridge. The surface snow throughout the bowl consisted of mostly semi-soft thin Wind Slab over Fist +. The Wind Slab failed on isolation. Stability test indicated a weak layer within the new snow. CTM 11, 11, 13, Q2 at 30 cm. Test slopes yielded only surface sluffing. Lower elevations (below ~ 9200’) the new snow was beginning to warm and slide off the underlying Melt/Freeze crust where disturbed by skis. Large cornices along the Crest making it difficult to access some of the terrain along the Crest. Minimal evidence of Rollerballs on solar aspects as of 200 pm. No Rollerballs noted below Hole in the Wall.

 

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Avalanche, Crest
Avalanche 2, Crest
Graupel & Rimed Irg's
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
Clear
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
West
Accumulation rate: 
None
More detailed information about the weather: 

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