Observation: Cardiff/Mineral

Observation Date
1/14/2019
Observer Name
Zimmerman-Wall
Region
Salt Lake » Big Cottonwood Canyon » Cardiff/Mineral
Location Name or Route
Cardiff/Mineral Forks
Red Flags
Red Flags
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
Status quo. The snow surface is weak in many locations. Of particular concern is how deep the surface facets have become. Greater than 10cm in places where wind slabs have been totally eaten away. There are also small facets just above and below the crust that has formed on south facing slopes >30 degrees. Some instances of this are due to Radiation Recrystalization. See previous obs on this from Forecasters. It will be interesting to see what kind of slab it will take to make these active. The current storm forecast for Tuesday will not be enough, but the next wave could light things up a bit. If winds put more of a load in certain places, conditions could get spicy. It will take quite a load to open up the basement door and let the monsters out (October Facets).
Comments
Fine weather for exploration and terrain previewing. We are fortunate to have such great access to incredible locations. Calm and cold at the trailhead in the shade, but warm enough to loose a layer on the skin. Ridgelines were up in the wind zone and there was saltation of snow down slope and even some instances of mid elevation snow movement. This was not an issue, as it was mainly just facets being blown around and not really being drifted into slabs. Wind board, dapple, crust, sastrugi, recrystalized pow, you name it, we got it out there. Keeps you guessing from turn to turn, but some locations provided Fair-Good skiing. Quite a lot of tracks across the range are evidence of people getting after it. On our exit out of Mineral Fork, we did notice a peculiar small slab that popped out mid-slope on Mongo No off the Santiago Ridge. It was difficult to tell the age of this slide in the waning afternoon light, but it was interesting none the less. 40' wide and probably 12" deep only running about 30-40' downslope. Adjacent to that was an older slide (after last storm). Also possible to view Diving Board glide avalanche from top of East Fork, as well as some other glide cracks farther up the drainage on Blue Ice.
Pictures:
Mongo No Slides
Blue Ice Glide Cracks
Wind effect on Monte Cristo. Intermittent moderate gusts moving snow.
Upper Cardiff mid-elevation wind affected slopes.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low