The GSP Regional SKYWARN Team operates on the following Amateur Radio Repeater Systems during active severe weather.
K9OH:
| Location | Frequency | PL CTCSS | Call Sign |
| Greenville Caesar’s Head Mtn. | 145.470 MHz | 91.5 | K9OH |
| Columbia, SC | 444.875 MHz | 91.5 | K9OH |
| Rock Hill, SC | 444.925 MHz | 91.5 | K9OH |
WARN System: To see a complete list go to www.warnsystem.org