Amazing increase in temperature from 22F to 40F from 4am to 6am this morning at Timberline. Warm air and sunshine battled strong and gusty north winds. Clear skies early with high thin clouds and filtered sun mid-day.
A small cornice fell in White River Canyon during the morning hours on an east aspect near 5800ft.
Freezing rain and/or riming following many melt-freeze cycles created very slick and icy surfaces above treeline that were slow to thaw even with the warm, sunny (but windy) weather Friday. Surfaces above 6500ft stayed firm and frozen and slide for life conditions were the greatest hazard of the day. Below, snow surfaces on steep southerly aspects began to thaw and soften around noon. Scattered across the icy slopes above treeline there were small patches of wind blown snow 1-2in deep. These primarily created a change in surface texture. Some deeper drifts were visible above 9000ft on the upper mountain.