Its hard to see Upper Yosemite Falls now due to rain, but it looks like there's tons of water, I'd have to think some of it is blowing onto the trail, the water is being blown towards the west. The freshets that cross the upper falls trail near Columbia Rock are pouring in top-to-bottom falls.
And...the NWS site has a Flood Warning for the Merced, 10.5 ft. expected at Pohono late this afternoon.