Negative 1 - Persistent Weakness

Negative 1
Submission Info
Monday, January 29, 2018 - 3:00pm
Negative 1 37° 43' 38.28" N, 119° 5' 28.32" W
Snowpit Observations
More detailed information about the snowpack: 

Observer: d lewis
Date: Jan 29, 2018, 3:15 PM
Lat/Lon:37.7273, -119.0912
Elevation: 10200 f
Aspect: NNE, Angle: 33°
Sky Cover: -BKN
Precipitation: No Precipitation
Wind Speed: Calm subjective
Current Temp: 8°C Trend:➘
Blowing Snow: Previous NE
Snow Depth: 120cm
Snow Temperature 20cm:-6.5° C 
Boot Penetration: 35cm

Comments: Toured up from June Mountain to assess Persistent weakness & recent snow bonding in the Alpine. Snow depth: 12" -24" on route to the Negatives, ~24-to 48" roughly throughout much of the easterly aspcts of the Negs. No visible snow transport, no visible roller balling, no visible avalanches. Stability tests results moderate to hard, depending on depth. Surface snow moist on E-S-W-NW aspects up to ~10,200'. Snow line ~9000', some snow below but not really rideable. Evidence of previous N - NE winds down to 10,000', severity depends on elevation, aspect and whether it's sheltered. Mid-pack weakness still lurking, waiting for more snow weight or a larger trigger. Surface snow temp -1.7 C. Stability Tests: CT14 Q2 101cm Weak Q2 CT26 Q3 55cm CT12 Q2 101cm Weak Q2 CT12 Q2 101cm CT23 Q3 65cm CT22 Q3 55cm. Skiing conditions varied from facets, isolated Wind Slabs, to developing melt/freeze crust (maturity depends on solar exposure, duration, and elevation). 

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

Thin cirrus increasing through the day, which kept the overall temps down but still noticeably unseasonably warm. ;-(

-- placeholder --

ESAC receives significant financial support from ...