The Brief Thunderstorms will move through Northern New Jersey Sunday evening through Monday. The National Weather Service has issued a Flood Watch for the area through Monday, including Bergen, Essex, Hudson, Passaic and Union counties. Most of Northern New Jersey is under a Flood Watch through Monday night because of the storms, including Bergen, Essex, Hudson, Passaic and Union counties, and further west. The flood watch in northern New Jersey goes into effect at 8 p.m. on Sunday, and continues through Monday evening. NYC weather this weekWhat's next:After Monday's flooding threat passes, a high pressure system will move into the area and make for a nicer Tuesday, Puente said.