I was walking to the grocery store in the rain this afternoon when the rain changed.  I thought leaves were falling from the trees as raindrops knocked them loose, until I realized it was snowing.  Huge snowflakes like cherry blossom petals falling from the sky fluttered down around me to disappear on the ground, like neutrinos passing through the Earth.  Every once in a while one would actually hit and leave a fading white splat long enough for me pass by.