science · 29 October 1947 · 77 years ago
In 1947, a forest fire at Concord, N.H. was drenched with rain produced by seeding cumulus clouds with dry ice, the first such event in the U.S. The rain-making planes were flown over the burning area by seeders from the General Electric Co. of Schnectady, N.Y. Part of Project Cirrus, the experimental mission was a joint weather research program of the U.S. Army Signal Corps and the Office of Naval Research. However, natural rainfall followed, caused by natural conditions, so it was not possible to measure the artificial rainfall.
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