It was the predominant Top 40 format music station in the area during the 1960s and into the 1970s. It was known during this era as "The Mighty 590". WARM has held its original call sign since it signed on the AM broadcast band in 1940.
WARM, a radio station with a long history, was a prominent Top 40 station during the 1960s and 1970s, known as "The Mighty 590".  It has maintained its original call sign since it began broadcasting in 1940.