Yosemite Hatches: Large Stoneflies were out in good numbers, but the trout weren't rising to the top to eat them yet.
Best Flies as of 2-27-18: Large stoneflies or Pat's rubber legs were working well. Green and black, size 8 to 12.
There is a National Weather Warning for the next two days for the Yosemite region. They are calling for 2ft to 5 ft of snow above 7,000 ft and 1ft down to the 3,500 ft level. This will change the water temp and clarity for the next week, so be prepared to adjust to these upcoming conditions.