Morristown, N.J. – Intense afternoon thunderstorms are drenching Morris County, with flash flooding now threatening roads and neighborhoods until 6:30 p.m. Thursday. Several towns—including Morristown, Dover, and Boonton—are already seeing water rising on low-lying streets.
According to the National Weather Service in Mount Holly, between 1 and 2 inches of rain have fallen since early afternoon, and radar indicates another 1 to 2 inches could fall before the warning expires. Flash flooding is already underway, with the greatest impacts expected in Morristown, Hopatcong, East Hanover, and along creeks and drainage areas near highways and underpasses.
Travel through the region remains hazardous as runoff quickly overwhelms storm drains and streams. Key roads, including routes in Morris Plains, Butler, and Lincoln Park, may close or become impassable without warning. Emergency management officials urge drivers to avoid flooded areas—most flood-related deaths happen in vehicles. Residents should also move valuables to higher ground and check local alerts for road closures or evacuation notices.
This is the first widespread flash flood event in Morris County since last summer, and more thunderstorms could spark additional warnings tonight. Stay tuned to official sources for updates as the situation develops. Another round of storms could arrive Friday, with saturated ground increasing flash flood risks.
Flash Flood Warning remains in effect until 6:30 p.m. Thursday. Further advisories may follow if heavy rain persists.
