Fon Luang: Thailand's 70-Year Rainmaking Program | RainViewer Blog

TL;DR: Thailand’s Royal Rainmaking Project started with one question in 1955: why is the sky full of cloud and no rain falling? Fourteen years passed between the 1955 idea and the first real trial at Khao Yai The 1969 trial dropped dry ice over the clouds and rain began within 15 minutes The technique still runs in three steps: trigger, feed and attack In 1992 the project became the official Royal Rainmaking and Agricultural Aviation Bureau Seeding needs clouds that already hold moisture; a clear sky cannot be seeded at all On 14 November 1955, King Bhumibol Adulyadej visited Thailand’s northe