Charleston County officials urged the public to be cautious this afternoon as tropical storm-force winds from Hanna are expected to arrive around 2 p.m. Friday. The storm is still tracking toward Georgetown and Horry counties. Tropical Storm Hanna is heading more northwest than previously, with landfall expected at about 2 a.m. Saturday in McClellanville, the National Weather Service reported in its 11 a.m. advisory. The storm is predicted to remain a strong tropical storm.