Observation type - Snowpack
Observer - Allen Giernet
Keep me anonymous if published - no
Location (general area) - Mt. Baden Powell north face
Latitude - 34° 22' 23" N
Longitude - 117° 45' 6" W
Date (yyyymmdd) - 20121222
Time - 9:45am - 1:35pm
Road conditions to area - All roads clear to vincent gap parking area, isolated icy patches on N4
Temperature - 39°/ 3.9°c @ trailhead see comments for notes by elevation
Sky - clear (no clouds)
Wind speed - Light (1-16mph Flags/twigs in motion)
Wind direction - S
Wind direction in degrees
Slope aspect - not observed
Slope angle - NA parking area
Elevation - 6491'/ 1978m
Snow depth - 4"/ 10cm
Boot/ Ski penetration - Ice crust crampons required
Precipitation - None
Activity, recent avalanches - No
Brief description
Whumphing noises, shooting cracks. collapsing - no
Rapid warming - no
Obvious avalanche path - no
Terrain trap - no
Comment - @ trailhead: N. aspect 28° angle 1"/ 2.5cm ice crust on unconsolidated snow. Crampons necessary for first 1,000' +

7300'/ 2225m Aspect: N 15° Angle 33° ⎢BP 1" crust collapsing/ Air T 28°/ -2°c⎢ below crust T 19°/ -7°c⎢5"/ 12cm below surface T 27°/ -3°c⎢snow depth 18"/ 45cm⎢snow grains mostly faceted with some rounding very little bonding

7900'/ 2407m Aspect: N 352° Angle 36°⎢BP crust is gone at this point 10"/ 25cm

8900'/ 2712m Aspect N 38° Angle 36° ⎢BP 5"/13cm⎢the 1" /2.5cm crust returns windboard/ melt freeze⎢Air T 25°/ -4°c⎢surf. T 19°/ -7°c⎢4.5"/12cm below sruface T 23°/ -5°c⎢Again no signs of bonding in snow below crust mixed rounds and facets

Summit ridge to Summit 9000'/ 2743m to 9399'/ 2864m⎢wind moderate SE⎢Sky obscured, inside cloud layer⎢Air T 23°/ -5°c⎢Surf. T 23°/ -5°c⎢4"/ 10cm below surf. T 21°/ -6°c⎢Wind scoured/ wind crust up to 2"/ 5cm thick on 3"/ 7cm to 4"/ 10cm unconsolidated snow⎢depth 4"/ 10cm to 6"/ 15cm with isolated pockets of wind loading in hollows.

No signs of wind loading on slopes

Evidence of past roller ball activity below 6500'/ 1981m on NW & NE aspects buried under last storm cycle especially active below rock outcroppings

All Northerly slopes appear to be holding snow well, we just need more
Publish this observation - Yes I would like this observation Published

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