A mesocyclone is a vortex of air, approximately 2 mi (3.2 km) to 10 mi (16 km) in diameter (the mesoscale of meteorology), within a convective storm. That is, it is air that rises and rotates around a vertical axis, usually in the same direction as low pressure systems in a given hemisphere. They are most often cyclonic, that is, associated with a localized low-pressure region within a severe thunderstorm. Such thunderstorms can feature strong surface winds and severe hail. Mesocyclones often occur together with updrafts in supercells, where tornadoes may form. Mesocyclones are believed to form when strong changes of wind speed and/or direction with height ("wind shear") sets parts of the lower part of the atmosphere spinning in invisible tube-like rolls. The convective updraft of a thunderstorm is then thought to draw up this spinning air, tilting the rolls' orientation upward (from parallel to the ground to perpendicular) and causing the entire updraft to rotate as a vertical column. Mesocyclones are normally relatively localized: they lie between the synoptic scale (hundreds of kilometers) and small scale (hundreds of meters). Radar imagery is used to identify these features. Mesoscale convective systems (MCS) can develop mesoscale convective vortexes which can spur later development of either another MCS or a tropical cyclone.

Benjamin Gold (1898–1985) was an American labor leader who was prosecuted for his communist political views under McCarthyism. He was president of the International Fur and Leather Workers Union from 1937 to 1955.

Ben Gold was born September 8, 1898 to Israel and Sarah (Droll) Gold, Jews living in Bessarabia, a province of the Russian Empire. His father was a jeweler, active in the revolutionary movement and a member of the local Jewish self-defense corps, institutions which existed in many towns as a precaution against pogroms launched by anti-semitic Black Hundreds groups.

The Golds emigrated to the United States in 1910, where 12-year-old Ben took a variety of jobs to help support his family, working in box factories, making pocketbooks, and working in millinery shops. He eventually became an operator in a fur shop. In 1912, the 14-year-old joined the Furriers Union of the United States and Canada, which changed its name a year later to the International Fur Workers Union of the United States and Canada (IFWU). He attended Manhattan Preparatory School at night to complete his education, intending to go to law school.