Record Rainfall, Flash Flood Warnings In NJ Amid Summer Storms

NEW JERSEY — New Jersey was under an enhanced risk Sunday for severe thunderstorms, which, as of about 6 p.m., had brought record rainfall and flash flood warnings to the state.

As of 5:40 p.m., the National Weather Service reported the Atlantic City Airport had set a record for new daily maximum rainfall on June 30 at 1.1 inches, nearly twice the previous record of 0.67 inches set in 2012, with any rain to come as the evening continued adding to the record.

There was a flash flood warning in place for Camden and Lindenwold until 9 p.m. People were advised to move to high ground and avoid walking or driving through floodwaters. Another warning was issued for Newark until 8 p.m.

The service issued a severe thunderstorm watch around 11 a.m. through 7 p.m. for all but the southernmost portion of the state, warning of frequent lightning, likely wind gusts up to 75 mph and isolated hail as large as ping pong balls. The watch also affected Connecticut, Rhode Island and parts of New York, Pennsylvannia, Delaware and Massachusetts. Another watch was issued around 3:30 p.m. until 11 p.m. for the southern tip of New Jersey as well as parts of Delaware, Maryland, the District of Columbia, Virginia and North Carolina.

"Another line of thunderstorms is now moving into the northern Delmarva and southern New Jersey," the service said in a social media post around 7:30 p.m. "For locations north of Philadelphia, the severe threat is now over."

There were several severe thunderstorm warnings issued for New Jersey throughout the day, including:

• Vineland, Glassboro and Williamstown until 8:45 p.m.
• Villas, Cape May Court House and Wildwood until 8:45 p.m.
• Port Norris and Cedarville until 7:45 p.m.
• Long Branch, Old Bridge and Tinton Falls until 7:30 p.m.
• Hammonton, Brigantine and Mystic Island until 7:45 p.m.
• Glassboro, Williamstown and Pine Hill until 7:15 p.m.
• Vineland, Millville and Bridgeton until 6:45 p.m.
• New Brunswick, Perth Amboy and Sayreville until 6:45 p.m.
• Camden until 6:30 p.m.
• Perth Amboy, South Plainfield and Carteret until 5:15 p.m.
• Morristown and Phillipsburg until 4:15 p.m.
• Morristown, Dover and Madison until 3:45 p.m.
• Hackettstown and Budd Lake until 3 p.m.
• Lake Mohawk, Newton and Franklin until 2:45 p.m.

The storms were expected to develop during the afternoon and progress west to east through the evening, mainly from 4-10 p.m, in a line near or northwest of Interstate 95 and then east and southeast, according to the service. Stronger storms were predicted to include frequent cloud to ground lightning.

Along the northern and middle Atlantic seaboard more broadly there was isolated potential for a tornado, according to the service. Isolated flash flooding was also projected to possibly occur between New England and the Southeast.

Mercer, Gloucester, Camden, Ocean, and northwestern and southeastern Burlington counties were also under a heat advisory from 11 a.m. to 7 p.m. Sunday with index values of up to 103 degrees expected.