Observation: Porter Fork

Observation Date
1/1/2015
Observer Name
Greg Gagne
Region
Salt Lake » Mill Creek Canyon » Porter Fork
Location Name or Route
Porter Fork
Weather
Sky
Clear
Wind Direction
East
Wind Speed
Light
Weather Comments
A few light breezes atop ridgeline, but mostly calm and windless. We were noticing wind drifting (from NE winds) off of both Gobblers Knob as well as Mount Raymond. Temperatures continuing to be comfortable, especially for uphill travel.
Snow Characteristics
Snow Surface Conditions
Faceted Loose
Wind Crust
Melt-Freeze Crust
Damp
Snow Characteristics Comments

Finding crusts on south aspects and it was dampening when we were exiting at 1200. A few very thin wind skins. Snow surface is weakening with NSF and well as surface hoar in drainage bottoms. It is likely our snow surface will continue to facet in the upcoming days.

Red Flags
Red Flags
Wind Loading
Red Flags Comments
I have noticed occasional plumes from E/NE winds across the higher peaks and ridgelines for the past several days.
Snow Profile
Aspect
Northeast
Elevation
9,200'
Comments

Route today was in West and Main Porter Forks. I was last in there in mid-December when the low elevation snowpack was essentially non-existent, and the upper elevations were thin and weak. Much better shape today with depths roughly 1 to 1.4 meters (~3-5') Numerous inverted pole probes, and on shady aspects was finding a stable snowpack with a stout rain/rime/temperature crust down about 70 cms (little over 2'). This crust has been widely noted throughout the central Wasatch, but this was 4 cms and was thicker than what I have seen elsewhere, and it was sandwiching a thinner crust. However, the faceted snow underneath - and between - the crusts was not especially weak. Test scores (for CT) were mid 20's with Q2/RP.

Overall a stable snowpack in this area.

Photo is of stout rain/rime/temperature crust.

Biggest immediate concern is continued wind drifting from E/NE winds at higher elevations onto lee slopes. For example, Gobblers Knob looks absolutely prime for the taking, but we noted plumes that were likely drifting the upper elevations of the west face. In his (always) excellent 12/31 post, Mark White noted he has been finding weak snow on W and NW aspects.

Photo is of plumes coming off Mount Raymond (10,200')

Big shout out to the calendar scheduling crew at my day job employer - Westminster College - for having the past 2 weeks off. Been the best 2 week stretch since 2010/2011 season.

Today's Observed Danger Rating
Moderate
Tomorrows Estimated Danger Rating
Moderate