Thunderstorm Wind — Sumter, South Carolina

2025-07-04 · near Pinckney Xrds, Sumter, South Carolina

Event narrative

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

Wider weather episode

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.

View location on OpenStreetMap → (33.9900, -80.5300)

Source: NOAA Storm Events Database, event_id 1266781. Narrative written by the NWS forecast office that issued the report.