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Observation: Salt Lake

Observation Date
2/25/2022
Observer Name
Haffener
Region
Salt Lake
Location Name or Route
Reynolds Glades
Red Flags
Red Flags
Wind Loading
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Avalanche Problem #2
Problem
Wind Drifted Snow
Problem #2 Comments
Wind drifted and pressed F hard snow along ridge on SW ridge of Reynolds, in Reynolds Glades, and upper NE ridge of Reynolds. Some cross loading on E face of Reynolds. Wind pillowed snow visible along Weathering Heights on exit.
Comments
Route: Ascended Gus' Gulch to top of Reynolds Glades. Skied Reynolds Glades. Skinned up the NE ridge of Reynolds Glades. Skied down NE ridge of Reynolds Glades and out Mill D standard exit.
Weather: Skies were mostly cloudy to obscured much of the day until around 3 pm when the sun came out in force. S-1 for a period in the morning. Minimal new accumulation during tour. Wind calm to light gusting to moderate at ridgetops. 1-2" new snow overnight.
Snow structure: No slab present in new snow in Gus' Gulch with zero wind affect. Once we ascended to the pass and for the remainder of our tour a F hard punchy and consolidated storm slab or slightly pressed wind slab was present, and in most areas lying over either looser F hard facets or looser F hard facets above a stout solar crust. Hand shears failed easily on the N/O interface above the pass and on backside of Reynolds. No red flags aside from infrequent wind transport but skies were very obscured and we were mostly in sheltered zones out of the wind.
I think for the most part we are transitioning to sketchy moderate (based on likelihood of triggering and size and distribution) for PWL and wind slab. We likely have pockets closer to considerable. My concern is that the next injection of warmer temps and intense sun will help consolidate and make the snow a more elastic slab. This is particularly concerning in areas with a weak foundation on W>N>E where loose facets lie under our new snowfall this past week. While this PWL is patchy in some areas, there are certainly many areas across the Wasatch with very poor structure. This was clear today in Reynolds Glades area with an abundance of punchy and cakey wind slabs lying over very weak facets. It's difficult to pinpoint where precisely all these slab/facet combo spots are, so the prudent strategy is avoidance for now dealing with this PWL, as the forecast specified today. I will in particular be avoiding large connected slopes >30 degrees, as well as smaller slopes >30 degrees with consequential runouts on W>N>E facing slopes. Again, many of the slabs I found were not particularly obvious with a large step change in density from the facets below. Despite slab and weak layer both being F hard, the slab was just stiffer than the loose facets below and I do not trust it. I am wondering if mid elevations in treed areas may be most dangerous for harboring facets under the new snow as these areas were more shaded and sheltered from wind pre-storm.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate