Nice day with some scattered clouds. Temps warmed quickly by late AM.
Feb 28, 2022
Jim Hill main bowl
|HS-Hard Slab||O-Old Snow||N-Natural||Report|
I found melt forms and thick crust below about 4,500ft, which softened up to nice corn by noon.
Above 4,500ft I began finding a layered structure with faceted grains above the early March crust. From 4,500ft to 5,000ft a thin temperature crust from the previous day existed above 1mm faceted grains, all over the stout crust.
From 5,000ft to 6,000ft I found the most consistent weak structure, with about 8cm of snow over the early March crust. The weakest, and largest faceted grains (Fist hardness and 1.5-2mm facets) were always just above the stout early March crust, capped with some new snow from the 8th. This snow had begun to facet out as well, but the grains were generally smaller and the layer slightly harder. Some profiles showed a few layers of stiffer wind skin resting over the weaker snow from the 8th. I could get columns to slide off the early March crust fairly easily with tilt tests, though the blocks were often breaking apart with crumbly snow.
Above 6,000ft I started finding more variable snow surface conditions with lots of interesting textures from wind etching. Some areas held small pockets of stiff, older windslab. Some of these rested on the same weak faceted grains just above the crust. Other areas had been scoured down to what was previously moist snow above the crust. This snow had become weaker with large-grained (2mm) striated facets. About 50ft below a ridgeline I found buried needle-like surface hoar below about 1cm of more recent snow. The newer snow broke off easily.