Red Cone > Hollywood Trees > McLoad Lake - Stability & Persistent Weakness Assessment

SNOWPACK OBSERVATION
Red Cone > Hollywood Trees > McLoad Lake
Submission Info
Forecaster
Friday, February 16, 2018 - 2:45pm
Red Flags: 
Obvious avalanche path
Red Cone > Hollywood Trees > McLoad Lake 37° 36' 12.132" N, 119° 1' 46.74" W
Snowpit Observations
More detailed information about the snowpack: 

Observer: d lewis
Loc: Hollywood Bowl
Lat/Lon:37.60337, -119.02965
Elevation: 9800 f
Aspect: NNW Angle: 34°
Sky Cover: -FEW
Precipitation: No Precipitation
Wind Speed: Light, subjective
Wind Direction: NW
Current Temp:1°C 
Blowing Snow: None
Snow Depth: 141cm
Snow Temperature 20cm:-7.5° C 
Boot Penetration: 25cm

Comments: Toured up to Red Cone> Hollywood Bowl > McLeod Lake to assess current conditions and persistent weakness in the mid & deep snowpack. Lower elevations (8500' to 9000') snow coverage is getting quite patchy with some impressive ice and ice flows at ground. Requires some walking between patches. From 9000' to 9300' easterly aspects thin with plenty of hazards to avoid. Very icy conditions around tree wells up to 9300' on easterly aspects. Above 9300' coverage improves, especially as you move to the N &NE aspects. Melt freeze crusts forming where there is any appreciable solar exposure. Maturity depends on solar exposure duration, aspect, & elevation. Shaded and sheltered NW to NE aspects hold mostly soft snow with the occasional thin Wind Slab or icy tree well. Upper Red Cone badly eroded from winds 2/14 with the furthest west entrance blown clean at the top. From the top down ~200 vertical, sastrugi and elevated tracks. The west aspect was wind textured but mostly soft with the occasional isolated wind slab or riffled melt freeze patches. Stability test negative. Mid pack and deeper facets are showing signs of sintering and strengthening. Previous mid pack and deeper melt freeze crusts have decomposed and mostly broken down with subtle density changes.

Snowpit or crown profile photo or graph: 
Weather Observations
Blowing Snow: 
No
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Cooling
Wind Direction: 
Northwest
Accumulation rate: 
More detailed information about the weather: 

Scatterd thin cirrus over the eastern horizon. 

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