Heavy Rain in Sumter County, South Carolina

Heavy Rain June 13, 2025 · Sumter County, South Carolina

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Over 6.5 inches of rain measured in 3 hours between 6pm and 9pm with over 3 inches of rain in 1.5 hours.

The wider storm

Diurnally driven convection developed within a moist and unstable air mass characterized by CAPE values greater than 2000 J/kg with weak wind shear and precipitable water values over 2 inches and dewpoints in the lower 70s. Storms were slow moving and trained across Richland and Sumter counties resulting in flash flooding. Isolated strong storms produced severe wind damage northwest of Sumter.

Began near Pinckney Xrds (33.9900, -80.5000).

Source: NOAA Storm Events Database, event 1272762. Narratives are written by the National Weather Service forecast office that issued the report.

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