Widespread rain crust on Carson pass

Arriving at 0800 @ 8500', temperatures were well below freezing right around 20F, winds were calm and skies were broken. Hitting the trail and looking around a small layer of graupel on the surface made the snow look pretty but was only hiding a rain crust from yesterday's weather. This rain crust was anywhere from 1-5cm thick. At times it was supportable but mostly breakable. Sometimes the rain crust was like walking on glass that shattered below your feet. As we approached Elephant's Back and frog lake this crust was on every aspect and elevation. The snow below this crust was soft and not bonding well to the crust above it. Around 0915 the wind picked up a little out of the NE and was blowing the thin layer of graupel around on the higher ridges and face of Elephant's Back. On test slopes, the surface rain crust would shear off but there was no results within the snow below it. We did stop to dig a pit to check stability under the crust, we had a few planar results about 20-30cm down on both shovel tilt and compression tests. The ECT had no propagation within these layers. As we climbed a little higher, trees, shrubs and brush displayed signs of a freezing rain event during the storm creating 1-3cm of ice on these surfaces. As we headed back towards the car we noticed that this freezing rain was specific to an elevation as the tops of the trees had solid ice and lower down there was still cold snow on the branches. With the graupel, surface ice, and freezing rain there was clear signs of large temperature swings during the storm from Monday.  We came across a old cornice fall that may have resulted from rain on snow and collapsed the cornice during the rain. On the way out we kept it conservative as conditions were not friendly to riding or skiing. By the time I left the wind was still blowing up high out of the NE and temps were climbing above freezing.