CHARLESTON, SC (WCSC) - The National Weather Service has issued flood warnings in effect through Sunday afternoon because of the potential of river flooding from heavy rainfall.
In Dorchester County, an areal flood warning is in effect until 2:30 p.m. on Sunday. While no additional rainfall was expected in the area, but the Dorchester County Emergency Management Department continued to report flooding in the Twin Lakes area. The concern is that flood waters from the Twin Lakes region will move downstream into the Ashley river, which could cause flooding in the Ashborough West subdivision, including Thornhill Drive and Mayfield Street and the Slands Bridge area.
Also in Dorchester County, a flood warning is in effect for the Edisto River near Givhans Ferry. At 1 p.m. Saturday, the river level was at 9.5 feet, with flood stage at 10.0 feet. The forecast calls for the river to rise above flood stage by early Sunday morning and continue to rise to near 11.4 feet by early Tuesday afternoon. Additional rises are possible thereafter. At 11.0 feet, Weeks Landing in Canadys (in Colleton County) is not accessible.
The National Weather Service is also monitoring the Santee River near Jamestown, where the stage was 16.5 feet at noon on Saturday. Flood stage is 10.0 feet. Minor flooding was occurring and moderate flooding was forecast. Meteorologists say the river will continue rising to near 18.1 feet by Monday evening with additional rises possible thereafter. At 18.0 feet, the boat landing at the end of Santee Landing Road will be inaccessible. The lower half mile of Corner Loop Road will be impassable because of backwater effects from Pole Branch Creek. Water covers the lower quarter mile of Lawton Farm Lane.
And in Williamsburg County, a flood warning is in effect until further notice for the Black River at Kingstree. At 9 a.m. Saturday, the stage was 11.31 feet. Flood stage is 12.0 feet. Minor flooding is forecast. The river is expected to rise above flood stage by early Monday morning and continue to rise to near 12.6 feet by early Thursday morning. Additional rises are possible thereafter. At 12.0 feet, flood waters will affect low lying areas along the river especially upstream from the Highway 52 bridge.
On Saturday morning, a flash flood watch for Charleston, Berkeley and Dorchester Counties was canceled as rain began tapering off. A flash flood watch for Williamsburg and Georgetown Counties was canceled later on Saturday.
Periods of rain Saturday morning added to ponding already present on roadways and flooding that caused problems for some neighborhoods during Friday morning’s heavy showers. But Sovine said rain will continue through lunchtime, but will be decreasing and become more sporadic.
The rainfall since Friday brings this December to the third-wettest December on record, with a total of 7.89 inches of rain. December is typically a drier month, but this month’s rain represents a surplus of more than six inches.
December of 1941 still holds the record as the wettest December, with 11.08 inches, followed by December 2009 with 10.06 inches.
Those records, kept at the Charleston International Airport, go back to 1938.
After the last of the rain moves out this weekend, the next rainmaker is expected to come in time for next weekend, Sovine said.