The
Weather Underground Organization (
WUO), commonly known as the
Weather Underground, was an
American radical left-wing organization founded on the
Ann Arbor campus of the
University of Michigan. Originally called
Weatherman, the group became known colloquially as
the Weathermen. Weatherman organized in 1969 as a
faction of
Students for a Democratic Society (SDS) composed for the most part of the national office leadership of SDS and their supporters. Their goal was to create a clandestine revolutionary party for the overthrow of the
U.S. government.