Charleston, Berkeley counties now under flood advisory; up to 4 inches of rain expected

National Weather Service

Update: The National Weather Service has issued a flood advisory for poor drainage areas of Charleston and Berkeley counties. At 5:09 p.m., radar indicated heavy rain due to thunderstorms. Up to 2 inches of rain have already fallen. Some areas that will experience flooding include Charleston, North Charleston, Goose Creek, Hanahan, and the Interstate 26 and 526 bridges. An additional 1 to 2 inches of rain is expected.

Update: At 4:22 p.m. National Weather Service radar indicated a severe thunderstorm located near North Charleston and moving east at 10 mph. Strong thunderstorms will impact parts of Charleston and Berkeley counties until 5:30 p.m. Hazards include strong winds up to 60 mph and quarter-sized hail.

Update: At 3:45 p.m. National Weather Service radar indicated strong thunderstorms along a line extending from near Moncks Corner to Garris Landing and moving east at 10 mph. Strong thunderstorms will impact parts of Charleston and Berkeley counties until 4:30 p.m. Hazards include strong winds up to 55 mph and up to penny-size hail.

Update: At 3 p.m. National Weather Service radar indicated a severe thunderstorm moving toward Goose Creek, Hanahan, Awendaw, Cainhoy and Wando by 3:45 p.m., according to an alert from AccuWeather.

The heat wave continues.

The mercury should climb to 98 at the Charleston airport this afternoon, with a heat index a sweltering 107, according to the National Weather Service. The chance of rain is 20 percent after 3 p.m.

The mercury at the airport reached 99 Tuesday afternoon — one degree short of the record of 100 that was set in 1986 — according to the weather service.

The normal high for this time of year of year is 91.

The record for today’s date is 101, also set during the heat wave of 1986.

Looking ahead through the weekend:

Thursday: Mostly sunny, high near 96, heat index around 105, 30 percent chance of rain, mainly after 2 p.m.

Friday: Partly sunny, high near 95, 30 percent chance of rain.

Saturday: Partly sunny, high near 93, 40 percent chance of rain.

Sunday: Partly sunny, high near 93, 40 percent chance of rain.

Reach Dave Munday at 843-937-5553.