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Observation: Moab

Observation Date
1/7/2023
Observer Name
T Nauman, J Darling
Region
Moab
Location Name or Route
Noriega's Backside
Weather
Sky
Few
Weather Comments
Beautiful bluebird day. Solar angles got direct sun for significant periods of time
Snow Characteristics
Snow Surface Conditions
Powder
Dense Loose
Wind Crust
Snow Characteristics Comments
Beautiful supportable powder conditions on W-WNW aspects. Aspect with even a hint of southern exposure near the ridge were getting heavy and had variable wind surfaces from earlier in the week.
Red Flags
Red Flags
Rapid Warming
Poor Snowpack Structure
Red Flags Comments
We dug a pit on a SW aspect to see how mid-elevations look. We encountered multiple faceted weak layers and had a fully propagated ECTP 28 that failed 58 cm below the snow surface. When we tried to pull the slab off the basal facets easily failed as well. This result will keep me off mid-elevation SW slopes above 30 degrees. We did now encounter any collapsing or other red flags and all the faceted layers seem to be on a healing trend with no major sharp gradients in snow temperature (see snowpit). So hopefully, the snowpack strength will improve. The snow at this elevation is shallower than areas recently evaluated and thus is not as resilient to loading. Forecaster note: Poor snowpack structure with weak, faceted snow exists, but failure does not appear to be full propagation. A score of ECTN 28 seems more appropriate. Propagation in a stability test indicates a slabs propensity to avalanche. Without propagation, an avalanche is not likely.
Avalanche Problem #1
Problem
Persistent Weak Layer
Problem #1 Comments
Multiple faceted weak layers exist on most aspects right now.
Snow Profile
Aspect
Southwest
Elevation
10,100'
Slope Angle
23°
Comments
Snow pit after ECT test with the upper line highlighting the test failure and the lower line indicating the basal facet collapse when we tried to pull the slab off the initial fracture.
Beautiful snow on the WNW aspect we skied.
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable
Coordinates