I lived through this one Buffalo October Surprise Storm Thursday morning we were on the water practicing (rowing team). It was 60 degrees out. We turned around to head back to the dock and the temperature dropped 20 degrees and the wind picked up. We raced back to the docks. Half of the sky was blue, Half was a greenish purple, with a distinct white line inbetween. By noon the snow had started to fall, thunder included. By 5am the next morning, there was a foot and a half on the ground and on all the leaves of the trees. There were driving bans for four days, no power… the trees were devastated. It’s still strange to go back and visit. Of course this is an extreme example, but it’s real. Thundersnows exist! :-)