KSBW history

Originally, it was affiliated with all four major networks—NBC, ABC, CBS and DuMont; the latter folded in 1955.

In 1957, KSBW's original owners bought KVEC-TV in San Luis Obispo, California, and changed the calls to KSBY. For the next 22 years, KSBY simulcasted KSBW, except for producing its own local newscasts and covering CBS programming.

ABC disappeared from KSBW's programming schedule when San Jose's then-independent KNTV decided to concentrate on the Monterey–Salinas market in 1960.

When KMST-TV (now KION-TV) signed on as a full-time CBS affiliate in 1969, KSBW became an exclusive NBC affiliate.

The simulcasting ended when Blair Broadcasting bought the two stations in 1979 and KSBY became a free-standing station.

On November 12, 1986, Blair Broadcasting sold most of its English-language stations to Gillett Communications (which would later acquire most of Storer Broadcasting's stations).

In 1987, KSBW built a 1,500-foot (460 m) tall tower atop Mount Madonna in the Santa Cruz mountains in anticipation of viewers from afar, particularly San Jose and the South Bay region.

Gillett later filed for bankruptcy on August 17, 1992, after the ski area and its media company was due to emerge from bankruptcy.

In 2000, KSBW abandoned the tower in favor of their original broadcasting point at Fremont Peak.

In early 2005, KSBW debuted its localized version of NBC Weather Plus, branded as KSBW Weather Plus on its second digital subchannel.

NBC's national Weather Plus operations were shut down on December 1, 2008, after the network's parent company NBCUniversal purchased The Weather Channel.