Thunderstorm Wind — Mccormick, South Carolina

2023-09-07 · near Bordeaux, Mccormick, South Carolina

Event narrative

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

Wider weather episode

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.

View location on OpenStreetMap → (33.9347, -82.3525)

Source: NOAA Storm Events Database, event_id 1122493. Narrative written by the NWS forecast office that issued the report.