Northern San Juan

Recent northerly winds stiffened and thickened a cohesive slab of snow on top of weak snow. You could trigger an avalanche that breaks deep within the snowpack where you find this strong over weak setup on slopes steeper than about 35 degrees. The most dangerous slopes face northeast and east at upper elevations. 

Avoid traveling near common trigger points, such as the edges of slopes where the margins of a cohesive slab are the thinnest. Give yourself a wide buffer from convex rollovers, rocky outcrops, and suspect slopes steeper than around 35 degrees. You may not experience any noticeable signs of instability before triggering an avalanche.