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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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