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Observation Date
1/11/2013
Observer Name
Greg Gagne
Region
Salt Lake
Location Name or Route
Butler Trees
Weather
Sky
Obscured
Precipitation
Light Snowfall
Wind Direction
Southwest
Wind Speed
Moderate
Weather Comments
Mostly S-1 snowfall rate, but there seemed to be a spike in snowfall to perhaps S2 rates about mid-day. Moderate gusts of wind along ridgelines. -15C at 8500'.
Snow Characteristics
New Snow Depth
14"
Snow Surface Conditions
Powder
Snow Characteristics Comments
About 35 cms (a little over a foot) new at 8500' in BCC. Wind loading along ridgelines created some sensitive soft slabs that would crack around your skis, but not propagate very far. Overall the fresh wind drifts and cornices were alot less sensitive than I was expecting. New snow was very light-density. Ski cuts on steeper test slopes could not produce sluffing in the new snow. HS at 8500' was 1.4 meters (4'+). Today was the first day all season I didn't hit a stump or rock.
Comments

Rather interesting to see how snow totals were distributed. Mid-BCC fared ok and it made for easy travel with stellar ski conditions in the light-density snow. Dug several quick puts in Butler Trees in mid-BCC between 8000'-9000' and was finding great spatial variability in the rime crust buried underneath about 30 cms (1') of new snow. Was not finding any consistency with respect to aspect or elevation (i.e. I would find it on a certain aspect at a certain elevation, but 300' higher on the same aspect I could not find it.)

Where I was finding the rime crust its thickness ranged from 1-15 mm (very thin to about .5") Facets underneath the crust were preserved and I was finding the thickness of the faceted layer ranging from 5-15 cms (2-6")

Overall there was not enough new snow and/or wind loading to affect the faceted layer underneath the rime crust. No collapsing despite jumping around on slopes where I was finding the buried rime crust.

With this storm seeming to affect mostly lower to mid elevations (where thinner snowpacks as well as the New Years faceted snow exists), on Saturday I would be concerned about deep new snow sitting atop weaker snow - especially at mid-elevations outside the Cottonwoods - as well as wind affected snow in the upper elevations. I think with some thought as well as a little probing in the snowpack, Saturday has the potential to be a day of safe & superb powder skiing.