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Observation: Flagstaff Ridge

Tyler FalkSalt Lake
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Quick report

Red Flags
Recent Avalanches, Heavy Snowfall, Wind Loading, Cracking, Collapsing, Poor Snowpack Structure
Red Flags Comment
<p>Lots of red flags out there.</p>

Wow what a storm!! Almost four feet of new snow in upper LCC. From Tuesday afternoon to this am there is around 55 cm of added depth to the snowpack at 9k in the same location. Up to 125 cm HS from 70 cm on Tuesday at 9k. Saw a few Artillery triggered slides this am from UDOT. The two I saw had a east component to them. (The one on superior and Toledo chute) The largest collapse I felt all day also occurred on a east aspect. (See pic below) Some cracking noticed around turns when we pushed the angle a bit. Did one quick ECT on a SE aspect around 9400. About the same results from a similar aspect that had a bit higher elevation from Tuesday. ECTP 17 Resistant Planar on 2-3mm facets below the storm snow that was 65 cm down from he top of the pack in that location.

Pic 1 Snow transport around Cardiff pass

Pic 2 Facets on east aspect on the ground where ECT failed. (3mm grid)

Pic 3 Cracking around turn

Pic 4 Artillery triggered slide in Toledo chute

Pic 5 Collapse with the snow pulled away. Failed on facets near gound.

Snowpack

Instability Comment
<p>Lots of windslabs out there today on almost all aspects. The most active seamed to be on east aspects from the NW winds that blew up to 80 mph as Evelyn said on the early morning advisory. </p> <p>These are definitely going to be large slides in the unmanageable category. </p>

About a foot of new in LCC overnight. Lots of terrain saw some amount of wind damage.