WWTH was originally WCLS "Sunny 100-dot-7," airing a satellite-fed adult contemporary format from Jones Radio.

In 1998, WCLS was sold from Spectrum Communications to Ives Broadcasting, which also owned WHSB 107.7 FM in Alpena at the time, and became "Kix 100.7," a satellite-fed country station.

In December 2004, Edwards Communications acquired WCLS along with WHSB and WHAK-AM/FM, and in April 2005, the "Thunder Country" format debuted on 100.7 FM (which sported the new calls WWTH) and 960 AM WHAK.

Originally the station was chiefly locally automated with some local announcers, but the station soon went with the "CD Country" satellite format from Jones Radio Networks (since absorbed into Dial Global's Hot Country format).

[2] The station syndicates the popular morning show Free Beer and Hot Wings.