July 28, 1979, near Norwich, England. On the fringes of a thunderstorm, large ice flakes fell for about 5 minutes along with pea-size hail and a few raindrops. The flakes were about 5 x 10 cm (2 x 4 inches) by 0.3 cm (1/8 inch) thick. They floated down slowly with the flat areas horizontal like falling leaves.
(Anonymous; "Remarkable Fall of Large Ice-Flakes," Journal of Meteorology, U.K., 4:280, 1979.)