Observation: Days Fork

Observation Date
2/11/2019
Observer Name
Grainger, Olafsen, Dromgoole
Region
Salt Lake » Big Cottonwood Canyon » Days Fork
Location Name or Route
Crystal Palace
Snow Characteristics
New Snow Depth
8"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments
8" of 2/10 new snow on top of Saturday 2/9 new snow made for glamorous conditions in areas sheltered from ridgetop scouring/deposit. 15 meters down from the Reed Benson ridgeline on a ENE face ~10,000' we found an HSn of 290cm with a very stable and right-side-up upper 130cm. The 2/9 and 2/10 storms despoisted thin graupel layers on the front end of precipitation but while skiing only the steepest of rollovers produced any new snow interface weakness. The graupel layers were observed at 20cm and 45cm down. (Pic 1)
Tests at this aspect/elevation showed ECTX and SSTs very stubborn, breaking apart Q3 within the 4F part of the slab ~60cm down. Observed no notable new snow activity in Days, Cardiff, or Silver from the ridge.
In passing by steep terrain at the base of a rockband in Days Draw found a narrow isolated section that had failed in old snow and now was covered by storm snow. debris was present several hundred feet lower but was the only PWL activity visible in our area. (Pic 2)
Only one area on a hard convex rollover showed natural soft storm slab activity ~6-8" deep. (Pic 3)
Red Flags
Red Flags
Heavy Snowfall
Wind Loading
Avalanche Problem #1
Problem
Wind Drifted Snow
Trend
Same
Avalanche Problem #2
Problem
New Snow
Trend
Decreasing Danger
Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate
Coordinates