Thunderstorm Wind in McCormick County, South Carolina

Thunderstorm Wind September 7, 2023 · McCormick 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

Tree down on a power line at 4200 Hwy 28 N, near Wideman Cemetery Road. Time estimated by radar.

The wider storm

An approaching mid-upper level trough from the TN Valley provided sufficient synoptic forcing across South Carolina for widespread severe pulse convection. Ample low level moisture and steepening lapse rates as the trough neared allowed for strong instability to develop, with very weak deep and low level wind shear. A deep layer of mid-level dry air wrapped around the trough aloft and provided sufficient evaporative cooling aloft for both severe hail production and enhanced downbursts.

Began near Bordeaux (33.9347, -82.3525).

Source: NOAA Storm Events Database, event 1122493. Narratives are written by the National Weather Service forecast office that issued the report.

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