N.J. weather: When will the heavy rain, thunderstorms from Ida remnants start?

The remnants of Tropical Storm Ida are expected to bring heavy rain and thunderstorms to New Jersey by Wednesday and last into Thursday, according to forecasts.

The National Weather Service said rain is expected to begin Wednesday morning with the chance of at least 3-5 inches and locally higher amounts. Flash flood watches are in place from 2 p.m. Wednesday.

“The remnant low of Ida will pass through the region on Wednesday and Wednesday night. Excessive rainfall is the main threat with this system, with severe storms possible in southern portions of the region as well,” a briefing from the weather service’s Mount Holly office said.

The highest amounts will be from from the I-95 corridor north and west, forecasters said.

“Numerous instances of flash flooding are likely Wednesday and Wednesday night, with some events possibly significant, since the ground is saturated from recent heavy rain events,” the briefing said.

Widespread river flooding was likely to occur if the projected amount of rain ends up falling across the Garden State, the office said.

N.J. weather: When will the heavy rain, thunderstorms from Ida remnants start?

The remnants of Hurricane Ida are expected to hit New Jersey starting Wednesday afternoon with drenching rain, flash flooding and the risk in South Jersey of severe thunderstorms.

Forecasts call for showers and thunderstorms moving in before 4 a.m. in South Jersey. In northern New Jersey, thunderstorms are possible around 8 a.m. while the threat of heavy rain continues through late Wednesday and early Thursday.

“This rainfall combined with wet antecedent conditions (will) likely lead to flash flooding. Flooding of fast responding rivers and streams is likely, with flooding of main stem rivers possible,” a weather service advisory said.

Roads and structures along particularly susceptible rivers, creeks, and streams would likely be impacted, the office said.

Meanwhile, the National Weather Service’s Storm Prediction Center’s latest forecast maps show place a large section of Central New Jersey under a “slight” risk of getting severe weather and most of South Jersey under an “enhanced” risk.

“The tornado threat has definitely increased over the past few days, especially in coastal-southern New Jersey and Delmarva,” Nick Carr, a meteorologist at the weather service in Mount Holly, told NJ Advance Media.

A gale watch was also in effect for all marine areas Wednesday night through Thursday, forecasters said.

This post has been updated with additional information from the National Weather Service.

Staff Writer Len Melisurgo contributed to this report.

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Noah Cohen may be reached at [email protected].