The estimated maximum wind speeds were 100 miles an hour.
The most significant damage was in George Washington Memorial Park Cemetary in Paramus, and in the Paramus Golf and Ridgewood Country Clubs.
Trees were snapped and uprooted.
As a line of severe thunderstorms moved Northeast, the weather service says a portion of the line accelerated and produced a weak tornado as it moved across Bergen County.
A tornado is classified as EF1 when wind speeds are 86 to 110 miles an hour.