Alexander George McAdie (August 4, 1863 – November 1, 1943) was an American meteorologist.

In 1885 at Blue Hill, Boston, he modernized the experiments of Benjamin Franklin by attaching a voltmeter to a kite and measuring the voltage difference between the ground and several hundred feet up.

[1] He is also known for testifying about the potential effects of electrocution (based on his experience with lightning) in 1899 at the first trial to decide if the electric chair was cruel and unusual punishment.

In addition to his work with the weather bureau, McAdie wrote a detailed account Archived 2015-09-24 at the Wayback Machine of the 1906 San Francisco earthquake and compiled a catalog of earthquakes on the Pacific coast.

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