Observation: Days Fork

Observation Date
2/22/2019
Observer Name
Greg Gagne and Erme Catino
Region
Salt Lake » Big Cottonwood Canyon » Days Fork
Location Name or Route
Days Fork
Weather
Sky
Broken
Precipitation
Light Snowfall
Wind Direction
Northwest
Wind Speed
Light
Weather Comments
Clearing skies in the morning, with a few breaks of sun. Fortunately clouded up with very minimal solar affect. Periods of light snowfall in the afternoon.
Snow Characteristics
New Snow Depth
4"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments
About 5 cms overnight, with ad additional 2 cms of very low-density stellars during the afternoon. HS 1.8 - 2.5 meters, likely deeper in some terrain. Snow on top of Feb 14 storm has settled to ~30 cms.
Did find the 2 cm rain crust from Feb 14 below about 8400', with some weaker faceted snow underneath. Currently not an issue until there is a significant load or warming.
Comments
Really no specific avalanche problems identified today, and overall Low hazard. Top meter+ of the snowpack is strong, and really can't identify faceted layers in mid-pack. Paid attention to recent wind-loading, specifically Thursday's easterly winds. Above about 9400' we did find pockets of 4-8 cm slabs underneath the storm snow from overnight, but they were unresponsive to stability tests. Overall Low hazard, but a few things to keep in mind for Saturday:
On slopes approaching 40 degrees and steeper, the new snow is sluffing easily. We ski cut a very steep slope that produced a sluff that ran 250' vertical. I do think these are quite "manageable", but consider the consequences of being in steep terrain where getting caught in a sluff could take you into trees or over a cliff band.
On a steep slope (~45 degrees) my partner was able to get a buried wind slab to propagate a short distance (~5') after I had already skied the line, including a few ski cuts along the way.
I think these are issues on steep terrain (approaching 40 degrees) that is generally northerly facing above 9500'. It may even warrant a Moderate hazard in that very specific terrain, but overall most terrain has a Low hazard.
For Saturday the issues will be (1) possible warming on solar aspects, and (2) new wind drifts on leeward aspects from a bump in wind speeds from northwest winds. These issues will be at the snow surface and should be easily identified.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate