For the second weekend in a row, the Lowcountry coast is likely to be drenched by a few blasts of wannabe tropical weather.
A storm in the Atlantic off Wilmington, N.C., has begun to creep west, and computer forecast models Tuesday were calling for it to come ashore in South Carolina by Friday. It and another weather system perched over mid-Atlantic states will roil up gusty winds and heavy showers.
On top of that, a perigee “supermoon,” combined with wind and swells from Tropical Storm Ida in the distant Atlantic, is expected to produce higher-than-normal tides and waves, rip currents, possible coastal flooding and erosion.
“On and off right through the weekend,” said meteorologist Steve Rowley, National Weather Service, Charleston.
“Rain and gloom for the coast, Midlands and Pee Dee until next week,” said Mark Malsick, S.C. Climate Office severe weather liaison.
Offshore will be worse, with wind-whipped waves climbing 6 feet or more within 40 nautical miles of the coast and a small craft advisory in effect.
“It’s always a dangerous situation when you get a long set northeast wind over the Gulf Stream,” Rowley said. The weather already was moving into Charleston on Tuesday and showers from it were expected by Wednesday.
The storm is the latest to form in a weather pattern that has persisted in the region throughout the hurricane season, and tends to stir tropical systems offshore. If there is a bright spot, this one isn’t too likely to become tropical — so far, Malsick said.
“Subtropical at best, with upper level shear keeping it disorganized along the western side,” said meteorologist Shea Gibson, with WeatherFlow.
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