Observation: Emma Ridges

Observation Date
12/13/2022
Observer Name
Champion/Breen
Region
Salt Lake » Little Cottonwood Canyon » Emma Ridges
Location Name or Route
Emmas Ridge - West Bowl - in progress
Weather
Sky
Obscured
Precipitation
Light Snowfall
Wind Direction
Northwest
Wind Speed
Light
Weather Comments
Visibility was variable throughout the entire tour. Began the tour late morning, with low clouds and light snowfall. Throughout the day, the cloud deck rose and dropped, with the slightest amount of sun poking through around 2 PM. Snowfall was consistent throughout the entire tour, between S-1 to S1. Winds remained light throughout the tour, even with so much soft snow available for transport we did not see much transport occurring.
Snow Characteristics
New Snow Depth
20"
New Snow Density
Low
Snow Surface Conditions
Powder
Snow Characteristics Comments
Great riding conditions, 20+" of low-density snow covering almost every aspect. Winds have kept the transport at bay and left the snow surface nearly untouched. On upper-elevation ridgelines, large cornices are present but they don't seem to be actively growing.
On W/N/E facing aspects, the new snow feels rather bottomless, on the aspects that possess that solar crust you can feel it under the recent snow.
Deep trail-breaking in the flats.
Red Flags
Red Flags
Recent Avalanches
Heavy Snowfall
Collapsing
Poor Snowpack Structure
Red Flags Comments
A lot of obvious red flags out there today. We know that the poor snowpack structure exists, we have been seeing recent avalanches, and we just added a huge stressor in the form of recent snowfall. Time to play it safe, and stick to low-angle terrain.
Snow Profile
Aspect
Southeast
Elevation
10,000'
Slope Angle
28°
Comments
Prior to this past week, the entire Wasatch was covered with weak-faceted snow. We have now added anywhere from 15-30" of new low-density snow across the entire compass. We headed out today to see what more Easterly and Southerly facing terrain looked like. In zones we were breaking trail, we were still able to get audible collapses. In other zones where we were not breaking trail, the skin tracks have seen so much traffic, those slopes had likely already collapsed.
We dug a pit at 10,000' on a southeast aspect and found weak faceted snow near the ground, but were unable to get any propagation within our pit. On most solar aspects you can find a supportable solar crust just below the new snow. This will allow the southerly-facing aspects to be a bit more stubborn, and we will likely see less activity on this layer until we get more water. The aspects that remain concerning are those lacking supportable crusts.
On the side of the compass lacking the solar crust, the low and mid-elevation aspects are especially suspect right now. This is unusual and should be paid close attention to. We are seeing close calls, and near misses within these elevation bands. While they are areas people may often folk to during periods of high danger, the slope angle of these lower angles needs to be closely paid attention to.
Video
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable
Coordinates