I grewup in Ohio and lived with my Grandparents. Grandpa grewup on a farm and always knew when a tornado was coming. I spent time in the basement but just once was it necessary. To this day I look at tree leaves for telltale signs of odd air circulation and check if the sky is green. Stuff like this isn't something you ever forget.
I know that color. Been years since I've seen it, but I"d know it instantly if I saw it again.