Hail? Largest hail stone? Hail prevention?
20161128/https://en.wikipedia.org/wiki/Hail
20161128/https://en.wikipedia.org/wiki/Hail_cannon
20161128/https://en.wikipedia.org/wiki/Cloud_seeding
Weather modification… and its tactical military use.
20161128/https://en.wikipedia.org/wiki/Weather_modification
20161128/https://en.wikipedia.org/wiki/Operation_Popeye