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Flash Flood in Chester County, Pennsylvania

Flash Flood September 1, 2021 · Chester County, Pennsylvania

Death

$40.0M

Damage as recorded

$1.0M

Crop damage

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Widespread flash flooding occurred in Chester County with many road closures and vehicles stranded. There was a flood related fatality in Downingtown. Numerous waterways in the county flooded, including the Schuylkill River, the West Branch of the Brandywine Creek, the East Branch of the Brandywine Creek, White Clay Creek, Red Clay Creek, French Creek and Valley Creek. There were many reports of water entering buildings and homes.

The wider storm

Post Tropical Cyclone Ida brought heavy rain to eastern Pennsylvania on September 1. Rainfall totals were as high as 5 to 10 inches. The heavy rain caused significant flash flooding, mainly in the southeastern part of the state. It resulted in widespread property damage. There were several fatalities.

Began near Nottingham (39.7341, -76.0393).

Source: NOAA Storm Events Database, event 981414. Narratives are written by the National Weather Service forecast office that issued the report.

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