Thunderstorm Wind in Sumter County, South Carolina

Thunderstorm Wind July 4, 2025 · Sumter County, South Carolina

60 mph

Estimated gust (52 kt)

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

What the National Weather Service wrote

Sumter County 911 dispatch reported trees down throughout the county. No specifics given.

The wider storm

Weak upper ridging along with a developing low off the Southeast coast allowed deep moisture to reach the eastern Midlands by the late afternoon on the 4th with PWAT's that reached 1.6-1.7 inches. This ample moisture and weak forcing/shear allowed a strong pulse environment to develop with MLCAPE approaching 1500-1800 J/kg by the afternoon. This led to the development of an isolated severe storm in Sumter County with reports of downed trees.

Began near Pinckney Xrds (33.9900, -80.5300).

Source: NOAA Storm Events Database, event 1266781. Narratives are written by the National Weather Service forecast office that issued the report.

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