Summary

Snow safety teams triggered large avalanche breaking to the ground yesterday, and forecasters reported worrisome snowpack test results along the US 550 corridor.  This provides clear evidence that you can trigger an avalanche breaking on buried weak layers today. You can trigger avalanches from the bottom of the slope, from adjacent slopes, or from a distance. Cracking, collapsing, and recent avalanches are all signs of a dangerous snowpack. The most dangerous slopes are steeper than around 35 degrees, and face west to north through southeast.

Look for signs of wind-loading like lens-shaped pillows and textured snow surfaces below ridgelines and along steep gully walls to identify suspect areas. You can find safer riding options at lower elevations where the slab is not present, on lower-angle slopes, and in areas sheltered from the wind.

An incoming winter storm will bring snow to the area overnight and into tomorrow. Expect avalanche hazard to rise, and watch for rapidly changing conditions.