Observation Date
2/21/2025
Observer Name
Pagnucco/Garcia
Region
Logan » Providence Canyon » Dog Leg Trees
Location Name or Route
Dog Leg Trees
Weather
Sky
Few
Wind Direction
Northwest
Wind Speed
Light
Weather Comments
Beautiful day in the mountains with ample sunshine, light winds, and high temps in the high 20sF.
Snow Characteristics
New Snow Depth
10"
New Snow Density
Medium
Snow Surface Conditions
Powder
Snow Characteristics Comments
Hero riding and sliding conditions today with 8-10" of medium-density snow sitting atop a few feet of right-side-up snow from the past week. We observed small surface hoar in northerly facing terrain. This created paper thin surface hoar sluffs when you traveled downhill.
Red Flags
Red Flags
Heavy Snowfall
Poor Snowpack Structure
Red Flags Comments
This zone did not receive nearly as much snowfall in the past week as the Tony Grove area, but there is great coverage and generally deep snow except in the upper starting zones. Today, we dug two pits at about 8200' (247 cm deep) and 8900' (125 cm deep). We got ECTNs in both, meaning we could not get any propagation across the isolated slab. There was definitely weak snow present, but for the most part, it is buried very deeply and unreactive to tests. The snow in the shallower pit up high was much more suspect with obvious facets almost falling out of the pit wall. These facets are from late January and are well-developed (2-4mm). They are capped by a heat crust from early February that appears to be what is providing any structural support to ride on.
We observed no collapsing or cracking, and no active wind loading. The only sign of instability we observed was a handful of loose wet avalanches on S-facing slopes at low elevation, mainly below rock bands.
Avalanche Problem #1
Problem
Persistent Weak Layer
Trend
Same
Problem #1 Comments
There are weak layers (facets) and I still think it is possible for someone to trigger an avalanche in areas where the snow is shallow or the slab is thin.
Avalanche Problem #2
Problem
Wet Snow
Trend
Same
Problem #2 Comments
Observed loose wet activity on S-facing slopes at mid and low elevations.
Comments
1. Deep pit at 8200'.
2. Shallower pit at 8900'.
3. Settlement
4. Rime on trees.
5. View of Logan Peak and good coverage.
6. Loose wet avalanches in the quarry.
7. Snow pit showing obvious weak faceted snow from late Janaury under a dirty heat crust from warming during early February that is holding this shallow upper snowpack together.
Video
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Coordinates
