Freezing rain and then snow is expected to fall Tuesday. Roads will ice over. Some power lines will drop.
Arctic cold will overtake rain on Tuesday morning, turn it to freezing rain in the early afternoon and snow at night. Summerville and other inland areas might see the change in the late morning, said Jonathan Lamb, National Weather Service, Charleston.
As much as three-quarters of an inch of ice could drop. Inland could see maybe an inch of snow Tuesday night.
"It's pretty much going to be an all-day thing," said meteorologist Brett Cimbora with the Charleston office.
The Weather Service on Monday afternoon issued an ice storm warning for the Charleston metro region, in effect from noon Tuesday to 5 p.m. Wednesday.
Power outages, iced-over bridges and roads remain among the chief concerns. Winds will gust and overnight wind chills will drop into the teens Tuesday night, and high temperatures won't rise much above freezing until Thursday.
SCE&G is preparing for widespread outages because of ice on lines and downed trees.
"Vigilant, I think, is the word. We're preparing for the worst and hoping for the best," said Eric Boomhower, SCE&G public affairs manager.
But power-generation problems that led to rolling blackouts in the extreme cold this month aren't expected to happen again because the temperatures are not expected to drop so severely, and improvements have been made at the generating facilities, he said.
S.C. Department of Transportation has pre-positioned sand and salt to spread over bridges and iced spots. The S.C. Highway Patrol asks motorists to use caution on bridges, overpasses and shaded areas.