New Jersey Severe Flash Flood Warning | Effective 08/03/2026 02:37

FFWPHI The National Weather Service in Mount Holly has extended the * Flash Flood Warning for... Northwestern Mercer County in central New Jersey... Morris County in northern New Jersey... Somerset County in northern New Jersey... Southeastern Hunterdon County in northwestern New Jersey... * Until 715 AM EDT. * At 537 AM EDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across portions of the warned area. Gages on the Whippany River at Morristown and the Neshanic River at Reaville have both shown rapid rates of rise to near flood stage. Between 1.5 and 3 inches of rain have fallen across the warned area with an additional rainfall amount up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. * Some locations that may experience flash flooding include... Morristown, Somerville, Bridgewater, Dover, Madison, Middlesex, Florham Park, East Hanover, Lincoln Park, Bound Brook, Manville and Kinnelon. This includes the following highways... Interstate 287 in New Jersey between mile markers 12 and 53. Interstate 78 in New Jersey between mile markers 22 and 42. Interstate 80 in New Jersey between mile markers 34 and 48.