Observation: Chalk Creek

Observation Date
1/22/2022
Observer Name
Bill Nalli
Region
Uintas » Chalk Creek
Location Name or Route
Upper Chalk Creek
Weather
Weather Comments
Cold start to the morning, clear sky and little wind. Single digit temps in valleys until the sun warmed the day. Highs in the upper 20's by mid day in the alpine.
Snow Characteristics
Snow Characteristics Comments
2" of new snow on 1/20-21 greatly improved riding conditions. Lingering moisture on 1/21 produced a variable rime crust on W through N to NE aspects on the north slope of the Uintas. We found it on most of the terrain in Upper Chalk Creek that we inspected with about 1cm of new snow on top.
Comments
It's hard to say if this new rime crust will become a player in the future. With no storms on the horizon, a lot can change if this crust sits at the surface and doesnt get buried. Lets hope it just breaks down and disappears by the time new snow finally arrives. The quality of the crust varies across the terrain. In some locations its thin and fryable, and others thicker and will be more persistent. Pic 1 and 2 are of the rime crust and 3 is just pretty rime in the trees.
We went looking for areas with a more shallow snowpack near and above treeline and to hunt-out zones where the persistent weak layer near the ground might still be a problem. Overall the basal facets have just lost their pizzazz. You can still find them on most slopes but in general they've rounded and strengthened and are now dormant. There are however many areas with a HS less than 150cm and in these spots there is still a chance for them to become reactive again if we ever get another big rapid load. For now they'll just have to live a boring existence like all the other well behaved older snow crystals.
The metamorphism focus is now centered closer to the surface with the new rime crust and deteriorating melt-freeze crust just below that. Small near surface facets can be found in proximity of the MFcr and all of this can be seen in the pic below.
This profile below was taken on a NW aspect at 10,100'. West through NW aspects have a slightly shallower snowpack than their N through E cousins. The facets near the ground are still 4F hard but rounded and unreactive to stability tests.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low
Coordinates