WARM-FM is an American adult contemporary radio station based in York, Pennsylvania broadcasting at 103.3 MHz FM. It is owned and operated by Cumulus Media. WARM's studios and offices are located off of US 30 between York and Lancaster, PA. Listeners in the Philadelphia region may have interference with WPRB, Princeton, New Jersey, which shares the same frequency.
WARM 103.3 hit Central Pennsylvania radio dials on March 28, 1983. The station spent its first few years using the WSBA callsign of its predecessor. The WARM callsign was moved to the station in 1988, having previously been used by Atlanta's Warm 99, also owned by Susquehanna Broadcasting, the stations' former owner.
The station has always broadcast some type of adult contemporary format from the time of its inception. From 1983 up until the mid-2000s, the playlist resembled a hybrid of "Soft AC", "Mainstream AC", and "Oldies": heavily focused on 1970s and certain 1960s soft rock songs, but containing plenty of recent and current soft rock hits as well. This hybrid format proved to be extremely successful, as WARM was repeatedly ranked at the #1 spot in the York market for several years, into the early 2000s.