UDOT PLANNED AVALANCHE CLOSURES!!

Observation: Mineral Fork

Observation Date
2/8/2020
Observer Name
L. Dunn, J. Steenburgh, K. Peters
Region
Salt Lake » Big Cottonwood Canyon » Mineral Fork
Location Name or Route
BCC>Mineral Fork>Moonlight
Weather
Sky
Overcast
Wind Direction
West
Wind Speed
Moderate
Weather Comments
A warm blue bird morning gave way to overcast skies, falling temperatures and gusty winds in the afternoon.
Snow Characteristics
New Snow Depth
2"
New Snow Density
High
Snow Surface Conditions
Dense Loose
Rain-Rime Crust
Snow Characteristics Comments
It was a bizarre day in the Wasatch. It started with talking our way through two police roadblocks in BCC where congestion in the upper canyon caused the closure of the canyon, but they allowed us to go up as far as Mineral Fork, so that's where we went skiing. The next bizarre thing was the snow. Probably a couple of feet of storm snow on Thursday and Friday with warming temperatures throughout the storm and lots of wind must have been followed by riming and eventually freezing rain, with a final topping of graupel. The rain crust was 1-2 inches thick and was completely supportable. On top of the rain crust was 1-2" of mostly graupel and other heavily rimed snow. A hasty pit revealed about 3' of very uniform and consolidated storm snow beneath the rain crust with no sign of the low density snow from last Monday, although perhaps we just didn't dig far enough. The new snow and the wind obliterated all small features in the snow surface, it was like nature's snowcat had smoothed the landscape. The graupel on top bonded to the crust well and was just deep enough to provide good skiing with just a little scraping sound at the end of your turns. The lower angle was much better than the steeper terrain. Even on the steep, we never broke through the crust. The final bizarre feature was a veritable snow pit at the bottom of the run, dug by a predator seeking a meal. The bloody snow at the bottom of the pit (4' deep) and animal remains tell the story (see picture below).
Red Flags
Red Flags
Recent Avalanches
Red Flags Comments
Well, there were natural D4s not far away in the past 24 hours, but where we were today the snow seemed completely locked up under an impressive rain crust. There were no signs of instability of any kind. It was pretty much like skiing a great groomer at a ski resort with just a little dense soft snow to push around.
Can't speak to the avalanche danger in other parts of the central Wasatch, but the avalanche danger in Mineral Fork was low today and probably will be low for a while. The scariest thing and greatest danger would be in crossing a steep slope on the raincrust where the wind had blown away the graupel, slide for life potential for sure.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low