Flash Flood in Montgomery County, Pennsylvania

Flash Flood September 1, 2021 · Montgomery County, Pennsylvania

$20.0M

Damage as recorded

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 Montgomery County with many road closures and vehicles stranded. Numerous water rescues took place. Many buildings and homes were flooded. Most waterways in the county overflowed their banks, including the Schuylkill River, Perkiomen Creek and Wissahickon Creek.

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 Oreland (40.1176, -75.1929).

Source: NOAA Storm Events Database, event 981439. Narratives are written by the National Weather Service forecast office that issued the report.

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