The station took to the air in July 1972 with 3,000 watts at 92.7 FM as WSMM, owned by Lock City Broadcasting, becoming the first FM radio station in the Sault Ste. Marie, Michigan market, and the second radio station total based in the city. The station initially programmed a format of MOR and country music. Lock City sold WSMM to Chippewa Broadcasting in 1974, and a few years later the station moved from 92.7 to 99.5 with a dramatic power increase to 26,500 watts. During the late 1970s, the station featured a soft rock format. As WLXX, the station continued with its AC format and eventually added nighttime Top-40 programming, competing with CKCY. "Yes FM" was born on February 1, 1985 when Delbyco Broadcasting purchased WLXX, changed the call letters to WYSS, and initiated a full-time Top-40/contemporary hit radio format in Sault Ste. Marie. In May 1986, Tim Martz Martz Communications Group continued the success of "Yes FM", and also brought the talk radio format to the Twin Saults in 1990 with the sign-on of an AM sister station, WKNW, in 1990. Martz sold both WYSS & WKNW to Chicago-based Marathon Media in 1998, which it held for a short while before selling them to Northern Star Broadcasting in 2001. Under Northern Star's ownership, WYSS migrated to a Hot AC format for a time in the 2000s, but has since returned to its previous Adult CHR presentation. After the February 9, 2010 sale to Sovereign Communications, some positions at the stations were eliminated as part of Sovereign's consolidation of its new and old Sault radio operations ; morning host/program director Tim Ellis and John "Johnny G" Gilbert were among those retained by Sovereign and remaining on Yes FM, though both have since departed the station. Additionally, WYSS replaced their popular "Soo Morning Crew" morning drive program with the syndicated Kidd Kraddick Morning Show in March 2010, with many alumni of that program moving on to Paradise classic hits station WUPN in 2012. WYSS' only currently advertised live local DJ is Scott Cook, who is also a popular program host at sister rock station WSUE. As of June 2020, the station is operating at reduced power of 1,300 watts from a 285-foot tower following a tower collapse in May 2018.
