Observation: Gods Lawnmower

Observation Date
3/5/2013
Observer Name
Greg Gagne
Region
Salt Lake
Location Name or Route
Kessler (God's Lawnmower & Kessler Slabs)
Weather
Sky
Clear
Weather Comments
Cool in the early morning with a rapid warm up as we were skiing out at 1130. No wind where we were traveling, but did notice plumes from SW winds off of high ridges above Alta & Snowbird by late morning.
Snow Characteristics
Snow Surface Conditions
Dense Loose
Faceted Loose
Wind Crust
Damp
Snow Characteristics Comments

Found dense, settled powder on north aspects with about 15 cms (6") above old crusts. Fortunately the weekend storm snow was dense so it largely kept you off of old, frozen crusts. Was finding widepsread very small-grained, near-surface faceted snow on shady aspects, but I imagine with the spike in temps and winds, this weak snow at the surface will deteriorate.

Red Flags
Red Flags
Poor Snowpack Structure
Red Flags Comments
Rather poor snow structure found on God's Lawnmower. HS 120 cms and very easy to push your ski pole handle down to the ground.
Comments

Route today was up Kessler, NE-facing Kessler slabs, N-facing God's Lawnmower. First time this season into this terrain and unsurprisingly was finding similar snow structure to what I have been seeing at similar elevations in adjacent drainages. Several quick pits just to identify the structure, and overall was finding 100-120 cm snowpack with faceted layers throughout, sandwiched between 4F-hard slabs. No collapsing or cracking. The missing ingredient was a slab on top with enough of a load to activate these buried weaker layers. General feeling was overall Low danger where we were traveling. This is fairly steep terrain, so before committing to anything we used ski cuts on rollovers, and were constantly looking for recent wind drifts from the Sunday night/Monday wind event. There were some small wind pockets on N-facing God's Lawnmower, and one 10 cm wind slab easily broke out from a ski cut. But these were not that widespread where we were traveling and would fall into the "very manageable category" as described in Drew's excellent blog entry regarding hazard ratings.

We skied out by late morning, and were just beginning to feel the effects of the sun on the snow. I imagine solar aspects were becoming active in the afternoon.