'Life-Threatening' Flash Flooding Possible In Bergen County, Warns NWS

NORTH JERSEY, NJ — The National Weather Service has issued a warning about "life-threatening" flash flooding Sunday in parts of Bergen, Essex, and Hudson counties, as powerful thunderstorms roll through the area.

Officials warn residents not to try to drive through floodwaters.

A flash flood warning has been issued through 9:45 p.m. Sunday.

See the thunderstorms on the radar here.

Prior Reporting And Links For Updates

While forecasters expect Hurricane Ernesto to stay off-shore when it passes New Jersey Sunday, heavy rains and dangerous rip currents are expected.

Forecasters say to hold off on swimming in the surf this weekend, and prepare for possible flash floods Sunday.

A hazardous weather outlook issued late Friday for Bergen, Essex, Hudson, Passaic, and Union counties says, "Isolated to scattered instances of flash flooding are possible Sunday afternoon into Sunday night."

That's because up to an inch and a quarter of rain is expected to fall throughout Sunday.

In September 2021, Hurricane Ida reached New Jersey as a tropical depression, yet took an estimated 30 lives, mostly in flash floods.

Different Storms?

Ernesto strengthened to a Category 2 hurricane as it approached Bermuda on Friday.

Hurricanes must have surface winds 75 m.p.h. or higher. See how hurricanes are categorized here.

For tropical storms, depressions, and waves, wind speed and other factors come into play. The National Weather Services discuss the differences here.

When does a storm become post-tropical? The NWS says, "A post-tropical cyclone that no longer possesses the convective organization required of a tropical cyclone and has maximum sustained winds of less than 34 knots [around 39 MPH]. A non-frontal low pressure system that has characteristics of both tropical and extratropical cyclones."

Weekend Forecast And Storm Tracking

• Follow the up-to-date Hudson County forecast here.
• Bergen County forecast here.
• Track Atlantic storms here.
• See the Hudson River tides here.

Other Handy Links

Forecasting weather is an imperfect science, so it's best to be prepared, then to check the most up-to-date numbers:

• Keep an eye on the radar here.
  
• See the Accuweather Minutecast here.
• See a current map of all watches and warnings in New Jersey here.

See the updated NWS forecasts, watches, and warnings for North Jersey:

• Bergen County here
• Essex County here
• Hudson County here

What about the rivers? This NWS map of the United States will show the potential for flooding.

Come back to Patch for updates.