A freezing rain advisory has been issued for Charleston County, which means there is a possibility of ice on the roads, the National Weather Service said.
"Freezing rain or freezing drizzle is forecast, but a significant accumulation is not expected. However, even small amounts of freezing rain or freezing drizzle may cause significant travel problems," the Weather Service said in its latest advisory.
Anywhere from a trace of ice up to one-quarter inch of frozen precipitation may occur overnight into the morning.
"It shouldn't get up to a quarter-inch," said Emily Timte, a forecaster with the Weather Service at Charleston International Airport.
Local bridges could potentially be affected, she said.
Whatever ice is present will thaw as temperatures warm beginning in late morning, she said.
Freezing rain is also forecast for Berkeley and Dorchester counties, which have cancelled school for Wednesday.
Charleston Southern University will close at 9 p.m. and remain closed tomorrow because of the weather, officials said.