Observation: Cutler Ridge

Observation Date
2/4/2021
Observer Name
Derek DeBruin
Region
Ogden » Ben Lomond » Cutler Ridge
Location Name or Route
Ben Lomond, Cutler Ridge
Weather
Weather Comments
About 25F at the trailhead around 8am. Sun peeked out for a moment, but skies grew increasingly cloudy throughout the morning with the summits obscured. Flurries and light snow (S-) throughout our tour, with little accumulation noted. Winds were light with the occasional moderate gust, and a bit stronger above about 8000ft.
Snow Characteristics
Snow Surface Conditions
Powder
Wind Crust
Rain-Rime Crust
Snow Characteristics Comments
Mixed bag of surface conditions. The rain/snow line was pretty high (7500-8000ft), with about 3" of new snow on top, give or take. New snow was relatively dense and featured graupel up to at least 8200ft, with graupel amounts decreasing with elevation. The rain helped smooth out the snow surface a bit, but didn't quite get rid of all the old tracks. Riding was a combination of wind affected snow, bare ice, and dust on crust.
Comments
Did a fair amount of poking around in the snow up into the mid elevations where snow depths ranged 160-200cm. New snow seems to be bonding well to the old surface. This is likely aided by rain, which left the upper 30-50cm of snowpack pretty damp below 7000ft. The 3" of new snow sits atop a thin crust of varying strength, in some places skiable, in other places barely noticeable. Below this crust the snowpack is around 1.2m (give or take) of fairly consistent 4F or so snow. Layers are evident from the various storms, but hand pits, shovel shears, and CTs in 4 or 5 locations along the NW to N to E part of the compass didn't reveal interface problems in these layers.
The bigger issue seems to be the monster lurking below, the old facets about 130cm down. These facets are slowly strengthening, with mixed forms and some moisture making its way into the this zone. Based on the avalanche activity of the last couple weeks in the backcountry, I think this is simply a case of it goes, it goes big. ECT was unreactive, but I had one CT fall off this layer on isolation. While it's not a formal test, I also drug my saw through the facets just below an ECT column I'd tested and got the thing to go about 65cm across. Not what I'd call a bullseye, but enough to make you stop and think. I'll probably be spending some time looking at PST and deep taps as the season progresses, as I don't think the persistent problem goes away anytime soon.
To top it all off, there was wind transport of the new snow as well.
Pictured below is consistent 4F pit wall (8100ft WNW) with scooped out facets beneath.
Today's Observed Danger Rating
None
Tomorrows Estimated Danger Rating
None