The persistent slab is at a critical depth right now, maybe you might trigger it, maybe you won't. Dig down and evaluate the snow before committing to your line.
Summary
Weather Forecast
A small storm rolls through Rogers Pass today, bringing 5-10cm of snow, moderate SW winds, and rising freezing levels (up to 1400m). A lull in storm systems is expected for most of Wednesday, but then a warm, wet storm smacks into the region Wed night. Freezing levels should rise to 1800m with 30-40cm of snow and strong SW winds.
Snowpack Summary
Variable wind-effect in the alpine was observed, with old avalanche crown-lines filled in from the mod-strong SW winds. Below tree-line, with the mild temp's, the new snow is settling into a reactive slab. Whumphing and cracking was also reported in sheltered locations with the suspect layer being the Jan 4th persistent weak layer.
Avalanche Summary
Observations of old avalanches showed significant propagation from alpine and tree-line features, suggesting the storm slabs propagated down to the Jan 4 surface hoar/sun crust layer. Several natural avalanches from yesterday were observed, with a notable size 3 from Tupper (Single Bench path) and 2 sz 2.5's from steep, N-facing tree-line paths.
Confidence
Freezing levels are uncertain