Flash Flood in Passaic County, New Jersey

Flash Flood August 18, 2024 · Passaic County, New Jersey

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

What the National Weather Service wrote

NJ 3 is closed in both directions east of the Garden State Parkway due to flooding.

The wider storm

A frontal system over the area on August 18th produced heavy thunderstorms that were fairly slow moving over northeast New Jersey. A cold front moving in from the west late in the afternoon produced heavy thunderstorms with an environmental MUCAPE of 2000-3000 J/kg and PWAT values of 1.7-1.8 inches. These slow moving thunderstorms produce rainfall rates of 1-3 inches per hour over New Jersey with total rainfall amounts of 2-4 inches. This resulted in widespread flash flooding during the evening of August 18th.

Began near Allwood (40.8500, -74.1800).

Source: NOAA Storm Events Database, event 1213865. Narratives are written by the National Weather Service forecast office that issued the report.

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