Hurricane Irma's worst South Carolina impacts expected to begin early Monday morning

Radar image of Hurricane Irma, Sunday (CNN)

High winds, heavy rain, storm surge and some flooding are going to begin in South Carolina early Monday morning as Hurricane Irma’s outer edge moves north.

ABC News 4 Chief Meteorologist Dave Williams forecasts torrential downpours in the southern coastal areas of the state begin after 5 a.m., and reaching their peak around 10 a.m. through the afternoon.

Rainfall totals of 3-6 inches are expected across the Lowcountry, with more in some places. Flash flooding, especially close to the coast, is likely from the heavy rains.


Williams forecasts a storm surge of 2-4 feet in Charleston County, although the National Hurricane Center says surge of 6 feet is possible in some areas along the South Carolina coast.

The effects of the flash flooding and storm surge could be intensified around noon Monday because of a coinciding high tide, Williams said.

The storm is expected to bring tropical storm force winds in the 30-70 mph range, with the potential to cause property damage and bring down trees and power lines.


A threat of isolated tornadoes will come later in the day Monday as storm bands continue to come onshore.

All of the Lowcountry is under a tropical storm warning and a flash flood watch, with several counties also under storm surge warnings and a hurricane watch.

Evacuations were ordered Saturday for eight barrier island along the South Carolina coast south of Charleston, including Hilton Head and Edisto Beach.

Irma was a Category 2 hurricane with 110 mph sustained winds as of 5 p.m. Sunday, located 470 miles south-southwest of Charleston and moving north at 14 mph.

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