Severe weather is the dominant concern at Congaree National Park, with Richland County recording 44 thunderstorm wind events and 32 flash floods in recent years — a combination that turns the park's low-lying floodplain boardwalks into genuine hazards during storm season. The park sits in a natural flood basin, meaning water levels can rise faster than conditions suggest from the trailhead.
Before heading in, check the park's flood-status page (updated regularly on the NPS Congaree site) and download a weather radar app like RadarScope so you can track incoming cells in real time. Pack rain gear and waterproof boots rated for standing water, and if thunder is within 10 miles, exit the elevated boardwalk immediately — lightning strike risk over open wooden structures is significant. Plan hikes for morning hours when afternoon storm buildups are least developed.
Top recorded hazards in Richland County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Thunderstorm Wind 44
- Flash Flood 32
- Hail 10
- Flood 3
- Heavy Rain 3
- Tornado 2
Gear keyed to this park's risks
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About Congaree National Park
Astonishing biodiversity exists in Congaree National Park, the largest intact expanse of old growth bottomland hardwood forest remaining in the southeastern United States. Waters from the Congaree and Wateree Rivers sweep through the floodplain, carrying nutrients and sediments that nourish and rejuvenate this ecosystem and support the growth of national and state champion trees.
Weather
Check the forecast before getting on the road. Conditions can change rapidly within the park. Flooding can happen with little or no warning, so make sure to check water levels for Cedar Creek and the Congaree River.