Dunderberg, Northeast Shoulder - Persistent Weakness & Patchy Snow

Dunderberg, Northeast Shoulder
Submission Info
Tuesday, February 6, 2018 - 2:45pm
Dunderberg, Northeast Shoulder 38° 4' 15.24" N, 119° 14' 34.08" W
Snowpit Observations
More detailed information about the snowpack: 

Observer: d lewis
Date: Feb 6, 2018, 6:40 PM
Loc: Dundemburg, Northeast 
Lat/Lon:38.0709, -119.2428
Elevation: 10150 f
Aspect: ENE Angle: 34°
Sky Cover: -FEW
Precipitation: No Precipitation
Wind Speed: Lightsubjective
Wind Direction: W
Current Temp:1°C
Snow Depth: 95cm
Snow Temperature 20cm:-4.5° C 
Boot Penetration: 40cm

Comments: Ascended the slopes on the northeastern shoulder of Dunderberg to treeline + until the snow became too patchy. Assessing how the warm temperatures are affecting sheltered Northerly slopes. Mixed melt/freeze breakable crust from ~9500' - ~10200'. Crust maturity depended on slope steepness, sun exposure, and elevation. Only well-shaded, open, steeper, northerly aspects have escaped the brutal warm/dry spell remain somewhat soft but it's hard to find long consistent lines of soft facets. Possibly look for snow (where present) on southerly aspects for more consistent snow conditions. Air temperature varied from 4c (9500', NE aspect, sheltered tress) to 1c. (10700', NE, isolated islands of trees) Snow temps @ 20 cm still cool ( -1 to -5). Stability tests mixed from very easy (upper wind slab failed on isolation) to moderate, consistently at 56 & 65 cm (from bottom), mostly planer trending toward irregular. Extended column test – ECT(N,ish) 13, @ 65cm, planer failure for half the column, stepped down to 57cm, both Q2. This is the weakest result I've seen recently for these lingering weaknesses. A weakness looking for a heavy load? 5 Stability Tests: CT14 Q2 64cm Failed @ 56 simultaneously, both Q2(-) CT14 Q3 56cm ECTP13 Q2 65cm Failed at 57 cm (from surface) for half the column, stepping down to 63 cm for the remainder, Q2-. CT14 Q2 56cm CTV Q3 65cm. Stability tests hint at a slow weakening of the mid-pack. 

Snowpit or crown profile photo or graph: 
Snowpack photos: 
Snowcover @ treelike
Weather Observations
Blowing Snow: 
Cloud Cover: 
25% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Air temperature trend: 
Wind Direction: 
More detailed information about the weather: 

Light Westerly to Northwesterly winds. Sky cover less than 2/8ths, scattered cirrus. 

-- placeholder --

ESAC receives significant financial support from ...