Observation: Cardiff Fork

Observation Date
3/7/2014
Observer Name
Greg Gagne
Region
Salt Lake » Big Cottonwood Canyon » Cardiff Fork
Location Name or Route
Cardiff Fork
Weather
Sky
Overcast
Wind Direction
North
Wind Speed
Light
Weather Comments
Temps hovering about -5 C and fortunately only a few breaks of sun. Was finding Light to Moderate gusts along LCC/BCC ridgeline with some drifting noted on S and SE aspects.
Snow Characteristics
New Snow Depth
4"
New Snow Density
Medium
Snow Surface Conditions
Powder
Snow Characteristics Comments

About 10 cms (4") of graupel-laden fresh snow with some rimed stellars mixed in. Makes for very fun and easy ski and travel conditions and by all accounts was well bonded to old snow surface as I was unable to get any shears or sluffing on any steeper aspects. For the most part there was no wind affected snow, however some upper elevation northerly aspects were wind-scoured, and I was also finding some sensitive fresh cornices as well as wind slabs on East through South aspects just off of the ridgeline.

Comments

We are enjoying a period of stable conditions with some refresh of new snow. Given totals were on the lean side, we are fortunate it is dense and it skis quite well on a soft, spongy surface. Apart from one wind slab on a South aspect I triggered with a cornice kick just at the top of Pole Line Pass, I was unable to find any weaknesses in the storm snow, and the snowpack is fairly deep and quickly goes to 1F hardness. In my travels in the upper Cottonwoods since about Feb 17, I have seen a very stable snowpack that has effectively bridged any deeper facets and depth hoar down near the ground. There have been a few isolated incidents that were reported last week, and I suspect there are some outlying areas in very steep, rocky areas where there is a thin snowpack where you could trigger a deeper hard slab, but I think this type of terrain is rapidly shrinking.

Mostly Low danger this morning (though will call it Moderate as I was able to trigger a fresh wind slab), and Saturday's concerns will be warming from the sun.

Am guessing all East through Northwest aspects aspects will be still be soft on Saturday morning, and it's even likely south and west may have only a minor zipper crust. Any reports from those who were out later on Friday afternoon will give us a much better sense of that.

Photo of 45 cm thick and 8 meter wide wind slab triggered from a cornice kick just above Pole Line pass on a South aspect

Video is of quick hand pit showing pooled graupel just below steeper cliff bands.

Video
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate