Weather Report was an influential jazz fusion band of the 1970s and early 1980s, combining jazz and latin jazz with art music, ethnic music, r&b, funk, and rock elements (in heavily varying proportions during the years), often demonstrating high levels of compositional and improvisational skills.
Being one of the groups most frequently associated with both fusion and jazz-rock may be seen as ironic, as Zawinul once said in a Down Beat interview he "did not understand what fusion meant" and Pat Metheny once revealed he and Jaco Pastorius sometimes used to talk about how much they disliked that musical style called "jazz-rock".
Founders Pianist Joe Zawinul and saxophonist Wayne Shorter first met and became friends in 1959 as they had both played in Maynard Ferguson's Big Band. Weather Report is despite this often seen as a spin-off from the group of musicians associated with Miles Davis in the late 1960s and early 1970s. The Shorter and Zawinul duo became a stable core of the group, while other musicians were rotated, with almost every new album release. Both Zawinul and Shorter had made their marks among the best composers in jazz, Zawinul in Cannonball Adderley's group and Shorter in Miles Davis' group. Zawinul would later join Shorter with Miles Davis' first recordings of fusion music, In a Silent Way and Bitches Brew. http://en.wikipedia.org/wiki/Weather_Report