UPDATE: Here's how much rain fell in New Jersey during the storms

Nearly a dozen cars from a dealership bounced off each other like a boardwalk game of bumper boats, as a flash flood overtook the Peckman River in Passaic County on Saturday evening.

In a video posted to Facebook, taken from an overpass on Route 46, cars -- some with their sticker prices still visible on the windshield -- can be seen floating swiftly down the rushing brown waters as onlookers stood on the bridge and watched in shock.

Posted by Miguel Galo on Saturday, August 11, 2018

Flash flood warnings had been issued throughout large portions of New Jersey on Saturday and North Jersey -- particularly Passaic County -- seemed to be the hardest hit.

Just under five inches of rain fell in Caldwell before 8 p.m. Saturday, according to the National Weather Service. Caldwell is about 5.5 miles south of Little Falls, where the dealership's cars were swept away.

Flood waters appeared to travel downstream from the harder hit areas, bringing a raging river to the overpass by Route 46 Chrysler, Jeep Dodge. The dealership can be seen in the background as a dozen vehicles -- mostly SUVs -- float easily, and swiftly down the Peckman River, crashing into each other and piling up at the edge of the bridge.

There were also reports of numerous cars stranded in parking lots and roads along Route 46 near the Best Buy parking lot.

Jessica Beym may be reached at jbeym@njadvancemedia. Follow her on Twitter @jessbeym. Find NJ.com on Facebook.