Observation: Reynolds Peak

Observation Date
12/14/2023
Observer Name
Meisenheimer / Staples
Region
Salt Lake » Big Cottonwood Canyon » Mill D North » Butler Fork » Reynolds Peak
Location Name or Route
Mill D North to Lees Fork to Reynolds
Weather
Sky
Clear
Wind Direction
Northwest
Wind Speed
Calm
Weather Comments
Felt like April in the sun. Cold in the shade. Prime faceting conditions.
Snow Characteristics
Snow Surface Conditions
Powder
Dense Loose
Faceted Loose
Wind Crust
Melt-Freeze Crust
Damp
Snow Characteristics Comments
Sunny slopes are crusted or wet depending on time of day.
Northerly (shaded) slopes are faceting. Some surface hoar exists, but the real issue will be the near surface faceting which is happening every day more and more right now.
Red Flags
Red Flags
Poor Snowpack Structure
Red Flags Comments
Our only observed red flag is the poor snowpack structure.
Avalanche Problem #1
Problem
Persistent Weak Layer
Problem #1 Comments
Our Persistent Weak Layer seems to be trending towards being dormant at the moment. Recent avalanches are becoming a thing of the past. Resorts using explosives in representable backcountry snowpack areas are not producing avalanches. Stability tests are trending towards upwards, meaning extended column test negative (no propagation) in most cases. Cracking and collapsing is a thing of the past.
With no new loading the avalanches danger continues to trend to unlikely.
Comments
Mark Staples showing a snowpit with a poor snowpack structure. The profile and photo are below. There's still a persistent weak layer present, but (1) no recent avalanches, (2) no collapsing or cracking, (3) no recent snow, (4) no wind loading, (5) stability test scores have been rising and this one didn't even break. The only red flag is the structure which is a cohesive slab on top of a weak layer of facets....they have adjusted to the load on top of them. They are generally dormant, but could certainly come to live with a another large storm.
Video
Mark and I decided to check out what a bed surface looked like. Our suspicions were confirmed that the snowpack is much shallower and more prone to faceting in shallower areas. We will want to keep an eye on slopes that avalanched during the first week of December.
These slopes (and there are many of them) have very shallow snow and are being exposed to wicked cold temperatures at night. Even today when the air was 31 degrees F, the snow surface on a NE facing slope was 15 degrees F. In these areas with thin snow (because they avalanches), there is a large temperature gradient faceting the entire snowpack.
Video
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low
Coordinates