Columbia, SC – Widespread rain is set to return across South Carolina beginning Thursday, with heavier, more persistent rainfall expected Friday as another moisture-rich system moves across the state. Forecasters say the highest rain totals are likely to fall south of Interstate 20.
According to the National Weather Service in Columbia, confidence is high that much of the Midlands and surrounding regions will receive at least one inch of rain between Wednesday afternoon and early Saturday morning. A NOAA probability map shows significant portions of central and southern South Carolina with a 70–85% chance of exceeding that threshold.
The greatest potential for two inches or more appears centered in a broad zone south of I-20 stretching through Aiken, Barnwell, Orangeburg, Manning, Sumter, and into portions of the Lowcountry. Some localized areas may experience moderate to heavy rainfall during peak periods Friday.
Short-term precipitation timing shows rain chances quickly ramping up late Thursday. By early Friday morning, most Midlands communities—including Columbia, Lexington, Newberry, and Camden—reach precipitation probabilities between 80% and 100%, remaining elevated throughout the day and into Friday night.
Forecasters say rainfall rates could become briefly heavy, especially in stronger bands, which may lead to ponding on roads, reduced visibility, and slower travel during the Friday commute. While widespread flooding is not expected at this time, isolated issues can’t be ruled out in poor-drainage locations.
Rain chances taper gradually early Saturday, with most areas trending drier by sunrise.
Drivers are encouraged to monitor updated forecasts, especially those traveling along I-20, US-1, US-378, and other regional corridors where rainfall may be heaviest.
