CHARLESTON, SC (WCSC) - A tropical storm watch continues for Georgetown and Horry counties as a potential tropical cyclone moves off the shores of South Carolina Monday night.
Affected locations include Georgetown, Murrells Inlet, Conway and Loris.
A tropical storm watch means that tropical storm conditions are possible within 48 hours.
The watch extends from Surf City, North Carolina to the South Santee River, an area that includes Georgetown and Horry counties.
Residents in the Tri-County have been experiencing rain throughout the day which is expected to diminish later tonight.
A flood advisory for minor flooding was in effect for the Tri-County Monday afternoon, but that has since ended.
Currently, the system is approximately 20 miles south-southeast of Charleston and 175 miles southwest of Wilmington, North Carolina.
The Live 5 Weather team declared Monday a First Alert Weather Day with impacts expected from a possible tropical cyclone off the Carolina coast.
The National Weather Service issued a Flash Flood watch for Georgetown and Horry Counties from 2 p.m. Monday through Tuesday morning.
Heavy rainfall will lead to ponding water or road closures. Up to three to six inches of rain is expected within most of the watch area with localized higher amounts possible.
Charleston County increased its status to OPCON 4, citing the possibility of wind gusts up to 30 to 35 mph, showers with thunderstorms and coastal flooding.
Georgetown County increased its status to OPCON 4 as it prepares for impacts from potential Tropical Cyclone Ten.
Live 5 Meteorologist Joey Sovine said upper-level winds have been shearing the system apart.
"We could get a minor tropical system," Sovine said. "We are starting to see development."
The system will become Tropical Storm Irma when maximum sustained winds reach a speed of 39 mph.
The system is expected to produce total rain accumulations of three to six inches along the upper South Carolina, North Carolina, and southeast Virginia coasts, with possible isolated maximum amounts of nine inches. The heavier rains may result in some flooding concerns along coastal areas north of Charleston.
"We can expect windy conditions along the coast with high seas and dangerous rip currents," Sovine said.
A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within the next 24 to 48 hours.
Rain chances will increase throughout Monday as the storm system moves northeast. The system is expected to produce total rain accumulations of three to six inches along the South Carolina, North Carolina, and southeast Virginia coasts, with possible isolated maximum amounts of nine inches, the National Hurricane Center said.
Formation chance through the next two days are high, with a 90 percent chance of formation, the National Hurricane Center said.
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