WMSI-FM (102.9MHz, "Miss 103") is aradio station inJackson, Mississippi, and owned byiHeartMedia, Inc. (formerly Clear Channel Communications until September 2014). WMSI's signal covers a roughly 90 mile radius around the city with an ERP of 100,000watts. It is Mississippi's primary entry point for theEmergency Alert System.

The station began in 1948 asWJDX-FM, an FM sister to WJDX (620 AM), broadcasting easy listening music in the early 1960s. In 1968, WJDX-FM switched to a progressive rock format, calling itself "WJDX, the Rock of Jackson" and becoming one of the first stations in the South to adopt what was then considered an underground format. Initially, deejays were granted complete control over the playlist, but a fairly loose rotation system was gradually imposed over the first few years. In 1973, the call letters were changed toWZZQ. By this time, the format had evolved into a local version of AOR (Album Oriented Rock), influenced but never restricted by Radio & Records weekly published music charts for that format. Mississippi artists such asB.B. King,Muddy Waters,Greg "Fingers" Taylor andPaul Davis were played, and occasionally saw their songs achieve local hit status. The ZZQ playlist, like AOR in general, imitated top-40 in that it featured hot, recurrent and gold rotations, but the "hits" were album tracks as often as singles, and the so-called "hot rotation" was much looser. Typically 6 hours or more would pass between successive plays of even the top-10 rock songs.

The WJDX news department maintained a presence on WZZQ, which took newsbreaks at fifteen minutes past every even-numbered hour beginning 6am weekdays, plus two extra morning drivetime newscasts and an extra afternoon drivetime, the last scheduled newsbreak of the day running at 6:15pm. WZZQ was the only FM station in Jackson at the time to broadcast so-called skycopter traffic reports. These were not featured regularly, but when traffic was particularly complex Nancy Bell would provide live updates from the WJDX "Flying J".

Sunday nights, newsman Howard Lett hosted a popular call-in talkradio show on WJDX-AM called "Point-CounterPoint." TheKing Biscuit Flower Hour was another weekend highlight; it featured popular rock musicians recorded in concert. For several years, Sunday nights featured one or two classic radio shows, usually includingThe Shadow.

In 1981, despite ZZQ's high ratings, new owners switched the station to a country music format, changed the calls toWMSI-FM, and immediately adopted the name "Miss 103".

• Facility details for Facility ID 59822 (WMSI-FM) in theFCC Licensing and Management System
• WMSI-FM inNielsen Audio's FM station database

32°12′50″N90°22′55″W / 32.214°N 90.382°W /32.214; -90.382

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