I own a business that requires me to open at 4am and I have heard screams that I always thought may have been a group of girls maybe. About 5 times a year, I will hear this while walking down my driveway to my car. They are so clear that I have called the police 2x over the last two years.
They always come from the woods back behind my neighbors home where the north branch of the metedeconk river runs. The river runs for many miles and empties into the ocean, so the area is well hidden, passing through allaire state park and a reservoir in town.
They are high pitched very loud screams that have startled me more than once. I often wondered how a woman could scream so loud. I have heard owls and other common screams but I know these are much louder and longer. Last two years I have heard them in spring and fall months maybe 5-6 Times a year. The odd thing I noticed is the wildlife always gets silent when i hear them. I only recently realized what they sound like after hearing similar screams on a tv episode that was documenting bigfoot out west. I would bet there is something here in NJ. I will start carrying a recorder this year.