Hailstones fell widely over the eastern side of the island of Hawaii on 30 January 1985. These Hawaiian hailstones were observed to have clear, circular centers that probably started on frozen drops. The average size of each frozen drop was estimated as approximately 1.8 mm in diameter. The unusually elongated hailstones suggested the existence of a very high content of supercooled water in the cloud. Analysis suggests that hailclouds in Hawaii contain many large supercooled drops. These raindrops freeze and act as the “embryos” of hailstones.
1On leave from the University of Hawaii