Quick report
Made it half way up Devil's Thumb, but a late start led me to turn around as some unexpected freezing rain rolled in. Above tree line, I checked a few test slopes and all were unreactive. I dug one pit around 3,900' on a 27° W slope so I'd still get something out of the day. I did a shovel sheer test (STM) which exposed a sugary weak layer around 40cm - 30cm. I also did a compression test (CT11, Q2), which failed at 40cm. The snowpack above the failure was a cohesive slab which didn't slide particularly easily/energetically over the weak layer. A thin rain crust was forming (on me and the snow) as I dug the pit and a 1F rain crust 10cm under the snow surface made for punchy skiing. Didn't notice any other signs of instability or recent avalanches on nearby slopes but visibility was poor for most of the time I was above tree line.