Heavy Weather is Weather Report's seventh album, released in 1977 through Columbia Records. It is the band's second album with bassist Jaco Pastorius. On Black Market, Pastorius played on two of the seven tracks, but here he is a full member of the band. It is on the short list of LP's considered to be the greatest of all Jazz-Fusion recordings.
Featuring the jazz standard "Birdland", the album is one of the best-sellers in the Columbia jazz catalog. Heavy Weather is considered a landmark album in the jazz-rock or fusion movement of the 1970s.
Its opening track, "Birdland", was a significant commercial success, something not typical of instrumental music