August 23
edit1853: The World Meteorological Organization, originally the International Meteorological Organization, was formed.
1873: The first known hurricane warning in history was raised for portions of the eastern United States, for a hurricane that would eventually strike Newfoundland. This warning was issued by Father Benito Vines, director of the Meteorological Observatory of the Royal College of Belén in Havana, Cuba.
1962: The first successful satellite of the Defense Meteorological Satellite Program, a series of weather satellites built and used by the United States Department of Defense, was launched. While classified at the time, later satellites in the program provided public data used for numerical weather prediction for several decades.
1998: An outbreak of severe weather caused major damage across northern Wisconsin and the Upper Peninsula of Michigan, killing one person.