As for repeater outputs, Charlotte Skywarn is 145.350 csq, Triad Skywarn is 147.255 csq, Central Carolina is 146.880 csq, Trenton 145.210, and Wilmington is 146.820 csq. When the OBX is cooking weatherwise, it's usually heard over the CELN system, some of which are Hatteras 145.150, Columbia 146.835, Farmville 145.270, Delco 443.400,and some more, depending on how many are linked up. All this and the amateur radio HF frequencies is how the EOC in Raleigh keeps up with what's going on in your areas during weather incidents. Once again it's amateur radio that makes the connection when it counts.
In the western counties, anything of note will usually show up on the Mt Mitchell repeater (145.190) and with reliable coverage in portions of 4 states, it becomes the king pin in the comm connections. I've used it from About Winston-Salem to Knoxville on I-40 more than once, but due to terrain, there are holes in there mobile wise, like in the Pigeon River Gorge section of I-40. Other than that and some local efforts, there are few, if any, organized weather nets in western NC, though I hear that an effort to put some together is underway.