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Flash Flood in Somerset County, New Jersey

Flash Flood September 1, 2021 · Somerset County, New Jersey

Deaths

$75.0M

Damage as recorded

$10.0M

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 the southern half of Somerset County with numerous road closures. There were two flood related fatalities in southern Somerset County, both in Hillsborough Township. There were approximately 1200 water rescues in the entire county. Many buildings and homes were either damaged or destroyed by the flood waters. Most waterways in the county overflowed their banks, including the Raritan River, the Millstone River, Green Brook, Stony Brook and Middle Brook.

The wider storm

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

Began near Branchburg Park (40.5774, -74.7004).

Source: NOAA Storm Events Database, event 986282. Narratives are written by the National Weather Service forecast office that issued the report.

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