The twister hit 75 mph, damaging a barn and home in White Township, the National Weather Service said.
It was a tornado.
The National Weather Service on Friday night confirmed a tornado touched down in Thursday's destructive storm that moved through Warren County.
A weather service survey crew that visited the worst-hit area of the county, around Tom Smith's Route 519 farm in White Township, confirmed the twister struck at an estimated time of 2:46 p.m. Thursday.
Warren County storm survey to be done after all
Its estimated wind speed maxed out at 75 mph, good for an EF0 on the Enhanced Fujita Scale used to classify tornadoes:
Enhanced Fujita Scale
EF0: wind speeds 65 to 85 mph.
EF1: wind speeds 86 to 110 mph.
EF2: wind speeds 111 to 135 mph.
EF3: wind speeds 136 to 165 mph.
EF4: wind speeds 166 to 200 mph.
EF5: wind speeds greater than 200 mph.
Source: National Weather Service
Frank Wheatley, county public safety director and emergency management coordinator, had initially said the storm did not produce a tornado. Then on Friday, he requested the National Weather Service survey, saying more expertise was needed to confirm just what had hit.
An EF0 tornado has been confirmed near White Township in Warren County with yesterdays storms. Further details: https://t.co/r81Vds0XJq
-- NWS Mount Holly (@NWS_MountHolly) July 15, 2016
The weather service survey measured the tornado's maximum path width at 75 yards, and put the length of the path at 2.8 miles.
Officials attributed no injuries to the tornado, though an injury was reported during the storm at Oxford Furnace Lake, where storm debris hampered rescue efforts for a period Thursday afternoon.
The tornado damaged Smith's barn, which had to be torn down, and a residence, the weather service confirmed.
"In addition, there were numerous trees down with the tops sheared off," he said. "Appreciation is extended to the local residents, Warren County Emergency Management, and the New Jersey State Police with their help in this storm survey."
Kurt Bresswein may be reached at kbresswein@lehighvalleylive.com. Follow him on Twitter @KurtBresswein. Find lehighvalleylive.com on Facebook.