WTNR (FM)
| Broadcast area | Grand Rapids, Michigan | 
|---|---|
| Frequency | 107.3 MHz | 
| Branding | Thunder 107.3 | 
| Programming | |
| Format | Country | 
| Affiliations | Compass Media Networks Westwood One | 
| Ownership | |
| Owner | 
 | 
| WKLQ, WHTS, WJRW, WLAV-FM, WWSN | |
| History | |
| First air date | 1962 (as WPLB-FM) | 
| Former call signs | WPLB-FM (1962–1989) WODJ (1989–2004) WKLQ (2004–2009) WBBL-FM (2009–2019) | 
| Call sign meaning | ThuNdeR | 
| Technical information | |
| Licensing authority | FCC | 
| Facility ID | 24639 | 
| Class | B | 
| ERP | 50,000 watts | 
| HAAT | 150 meters (490 ft) | 
| Transmitter coordinates | 43°01′08″N 85°20′56″W / 43.019°N 85.349°W | 
| Links | |
| Public license information  | |
| Webcast | Listen live | 
| Website | thunder1073.com | 
WTNR (107.3 MHz, "Thunder 107.3") is an FM radio station licensed to Greenville, Michigan. Owned by Cumulus Media, the station broadcasts a country music format targeting Grand Rapids.