Natural avalanche activity and collapsing of the snowpack are clear indicators that our persistent weak layer remains a serious problem to contend with. The snowpack structure is poor with a dense hard slab 2-3 feet thick on top of multiple layers of weak, sugary, faceted snow. Stability tests remain reactive but stubborn, and collapsing isn't widespread, but this just means you don't know if and when a particular slope is going to release. It could occur after multiple laps, and any avalanche triggered would be deep, dangerous, and likely un-survivable. The danger is greatest on steep northerly aspects near treeline where strong southwest winds have deposited thick slabs on top of these weak layers and this type of terrain should be avoided. West and east aspects near and above treeline, and northerly aspects below also remain suspect with equally poor structure. The main difference is a lack of recent wind loading. In these areas, deep, human triggered avalanches remain possible.

Brian Sparks dug down in the snow over near South Mountain yesterday. See his thoughts on the persistent weak layer problem here.

Dave and I dug into the snow on a NE aspect around 11,000' on Friday where we got a stubborn, but classic "cash register" release on depth hoar at the base of the snowpack.

A strong sun and very warm temperatures today will bring on a rising danger for loose, wet avalanches on sun exposed slopes. The danger follows the sun with east facing slopes affected first and westerly aspects getting hit later in the day. Signs of instability include roller balls, pinwheels, and sloppy wet snow up around your boot tops. Stay off of, and out from under steep slopes as they become wet and sloppy.