Kirk here with “dust devil” news from Sunday. “Dust devils form when a pocket of hot air near the surface rises quickly through cooler air above it, forming an updraft.” The difference between the hot air on Sunday (30 degrees!) and the cooler air above seems to be what caused this to occur in Kumamoto (you can see the Aso mountains in the background of the video). In Japanese it’s called a つむじ風 (tsumuji kaze). Tsumuji is a “hair whorl” so tsumuji kaze is a “hair whorl wind” – a much cuter term than “dust devil.” :)