Observation: Red Pine Gulch

Observation Date
1/13/2019
Observer Name
Zimmerman-Wall
Region
Salt Lake » Little Cottonwood Canyon » Red Pine Gulch
Location Name or Route
Red Pine/White Pine
Red Flags
Red Flags
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Decreasing Danger
Problem #1 Comments
Mid and upper elevation slopes facing northerly still exhibit poor structure conducive for failure once we have more of a load. Currently, the deciding characteristics for finding a persistent slab avalanche seem to be isolated, unsupported, rocky slopes with around 100-120cm of snow (repeaters). Additional considerations would be if these slopes are also harboring a wind slab. A good amount of the slopes we visited today in Upper Red and White Pine had average depths of 140-180cm of snow. With some areas well over 200cm in the Alpine. The mid pack slab is quite robust and thus sheltering the buried Oct. facets from the impacts of riders. The upper pack faceting taking place with clear/cold/calm conditions will come into question if/when we get a decent shot of snow, water, and wind. As a matter of course, we avoided suspect terrain features as noted above and kept to planar slopes that were held in compression.
Comments
The weather as of late has been ideal for visiting the high terrain to gather information about surface conditions, snow depths, and structure. The skiing has also been improving day by day due to the pre-existing wind slabs getting eaten away by the faceting process. Calm conditions and clear skies today made travel very enjoyable. Observed minimal saltation of snow along some exposed ridge lines and terrain features. Temps remained cold enough to make standing around in the shade slightly uncomfortable. And even during lunch in the sun, I put on a puffy. Supportable conditions made skiing and ridge-walking quite easy in the alpine. Some sand-boxing occurring in mid elevations form rampant faceting. Windboard on open high alpine slopes was smooth, but the dappled (textured) snow skied great, particularly in low angle gullies. Very small pockets of shallow wind slab noted and were easily identified by their hollow sound. Below 9500' coverage is still an issue in lots of terrain and there is plenty of buried treasure to trip you up and steal your PTEX. No activity noted today, although you could see there had been some natural activity following the last storm in Upper Red Pine between the lakes and above on the shoulder of White Baldy. Evidence of lots of big terrain ridden in Upper Red and White Pine with impunity this weekend.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low