Tornado Watch Issued for Eight South Carolina Counties
The National Weather Service issued the watch as Hurricane Isaias combined with high tides to cause widespread flooding.
Updated on Oct. 10, 2026 in Forecasts
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The National Weather Service placed eight South Carolina counties under a tornado watch as severe weather conditions developed across the state. A separate tornado warning remains in effect for Allendale County following a reported tornado sighting near Appleton.
Why it matters
The severe weather, exacerbated by the arrival of Hurricane Isaias and a king tide, has created dangerous conditions including significant flooding and road closures. These atmospheric impacts highlight the compounded threat of heavy rainfall and surge events in low-lying coastal areas.
A tornado was spotted 5 miles south of Appleton at 4:18 p.m. Additionally, the Charleston Harbor tide peaked at 7.76 feet earlier in the day, with a secondary high tide of 7.1 feet expected later this evening.
The players
National Weather Service
This federal agency is responsible for providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public.
Storm Prediction Center
Part of the National Weather Service, this organization monitors the potential for severe thunderstorms and tornadoes across the United States.
The details
The tornado watch affects Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester, Hampton, and Jasper counties. Downtown Charleston has experienced significant disruptions, with approximately 30 roads closed to traffic due to the ongoing tidal flooding.
Timeline
8:42 a.m. Oct. 10: Charleston Harbor tide peaked at 7.76 feet.
3:42 p.m. Oct. 10: Tornado watch began for eight counties.
4:18 p.m. Oct. 10: A tornado was spotted 5 miles south of Appleton.
4:45 p.m. Oct. 10: Tornado warning ends for Allendale County.
8:00 p.m. Oct. 10: Tornado watch expires and high tide predicted.
Seasonal Patterns
This weather event follows the landfalling Hurricane Isaias, which combined with king tides to generate hazardous flooding. These conditions mirror past major coastal surge events that significantly amplify the impact of tropical systems on the Carolina coastline.
Residents in the affected counties should immediately review their emergency plans and secure necessary supplies. Motorists are urged to avoid downtown Charleston due to the high number of road closures caused by tidal flooding.
The takeaway
The combination of tropical storm activity and seasonal high tides creates a volatile environment for coastal residents. Staying informed through official channels and adhering to local road closure guidance is critical during these multi-hazard events.
Further reading
For more information on current meteorological alerts, visit South Carolina Forecasts.
Source note: This article includes information reported by Post and Courier.
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