Observation: Patsy Marly

Observation Date
3/7/2024
Observer Name
Nathan Perahia, Damon Krytzer
Region
Salt Lake » Little Cottonwood Canyon » Grizzly Gulch » Patsy Marly
Location Name or Route
Patsy Marley NW Ridgeline
Avalanche Problem #1
Problem
Wind Drifted Snow
Trend
Same
Problem #1 Comments
Very limited visible wind effect on snow surfaces and zero wind transport was observed on our tour up to 9800’ on the NW ridge of Petty Marley. Winds were calm gusting to light changing from SW>W>NW during the day.
Avalanche Problem #2
Problem
New Snow
Trend
Same
Problem #2 Comments
On our tour the new snow ranged from 10-30 cm deep (30 cm on leeward side of upper elevation ridges at the very top). Avg HST was more like 20 cm at upper elevations. Sluffing was easy to trigger on slopes >40 degrees.
Snow Profile
Aspect
Northwest
Elevation
9,800'
Comments
Dug in a lightly wind affected area just below the ridge on a NNW aspect at 9800’. Winds were consistently light during the day out of the SW>W>NW and there was 30cm of new snow at the upper part of the ridgeline; HS of 310 cm.
Shovel tilt easy, broke on the new snow/old snow interface at 6-7” on a density change in the snow. New snow (20cm>) was very light; could pass fist through layer without resistance. Old snow (30cm<) had 4 finger/fist hardness. Indicative of possible old WS on isolated ridges.
CT 23 RP down 20 cm
CT 25 SP down 50 cm
ECTN M down 30 cm
ECTN H down 45 cm
Pit was dug around 13:00 MST. Air temperature was 29°F Sky condition was X with S1 with periods of S-1 during our tour.
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Coordinates