GREENSBORO, N.C. (WGHP) — Tropical Storm Helene is making its way north and causing historic flooding and tornadoes throughout North Carolina. Helene producing ‘historic and catastrophic flooding’, tornadoes in North Carolina; slowdown expected soon The storm struck in Greensboro, knocking a tree down across Randleman Road. A Tornado Watch is in effect in several Triad counties until 6 p.m. Friday.