Observation: Porter Fork

Observation Date
12/18/2018
Observer Name
Greg Gagne with "Gunner" Frey.
Region
Salt Lake » Mill Creek Canyon » Porter Fork
Location Name or Route
West Porter to Main Porter
Snow Characteristics
Snow Surface Conditions
Dense Loose
Faceted Loose
Wind Crust
Melt-Freeze Crust
Damp
Snow Characteristics Comments
Paid particular attention to the old snow surface as it will be a potential weak layer with new snow on top. The recent warmth, wind, and sun has helped prevent weaknesses at the surface from developing, and I was only finding faceted snow at the surface is isolated, wind-protected areas that were not receiving direct sun. Overall the snow surface does not look weak and few concerns once it (hopefully) receives a load on top.
HS > 8500' ranges from 60-120 cms
Red Flags
Red Flags
Poor Snowpack Structure
Comments
Route today was up West Porter, through and down through north-facing Main Porter. Was finding poor snowpack structure in Main Porter on Dec 6, and there was an avalanche in the Ice Box on faceted snow down near the ground on Dec 8. The October rain crust 10-15 cms above the ground varies in thickness, and in some places has now completely disintegrated. Where the crust is still in place the weakest snow is the faceted layer on top of the crust. The slab on top is right-side up, and goes from 4F down to 1F. ECTX on north aspects at 8800'. The slab on top of the faceted snow at the ground is strong and supportable, and in many places in Porter Fork over a meter in thickness.
Overall Low hazard as the slab is strong, and appears to be bridging the faceted snow down near the ground.
In a few other quick pits in thinner snowpack areas (60-90 cms) there are some 4F midpack layers that are beginning to facet. This is similar to what Mark and Andrew were finding on Kessler this past Sunday, where the thinner snowpack areas are beginning to facet. Not a concern yet, but something to keep in mind in thinner snowpack areas.
Overall Low hazard where I was traveling today. The persistent slab problem seems dormant, and the slab on top continues to gain strength.
Sorry, no photos or video.
Today's Observed Danger Rating
Low
Tomorrows Estimated Danger Rating
Low