New Jersey Will Face Rain and Flash Flooding on Sunday
A incoming storm system is projected to bring significant rainfall to the state throughout the weekend.
Updated on Sept. 18, 2026 in Forecasts
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New Jersey is set to experience a wet Sunday as an incoming storm system threatens to bring localized flash flooding to the region. Forecasts indicate the rain will become widespread by early to mid-afternoon.
Why it matters
High levels of atmospheric water vapor combined with heavy downpours create a significant risk of overwhelming local infrastructure. Residents should prepare for potential drainage issues as the storm progresses.
Meteorologists project rainfall rates of 1 to 2 inches per hour during the event. This follows a September 13, 2026, storm where 11 counties recorded at least 2 inches of rain, with some northern areas receiving over 5 inches.
The details
The storm system is expected to bring heavy rain that may overwhelm storm drains and cause small streams to rise. After a pleasant Saturday with temperatures in the low 70s, the moisture-heavy system will move across the state, with rain potentially lingering into early Monday morning.
Timeline
September 19, 2026: Sunny conditions throughout the day.
September 20, 2026: Rain and potential flash flooding begin.
2 a.m. to 7 a.m. on September 20, 2026: Potential onset window for showers.
September 21, 2026: Rain continues into the early morning hours.
Seasonal Patterns
This forecast follows the extreme weather event from September 13, 2026, where 11 counties across New Jersey faced significant flooding. The current system extends this recent trend of high-intensity rainfall that tests the capacity of the region's drainage infrastructure.
Residents should monitor local drainage areas for potential clogs and clear storm drains to reduce flooding risks on their property. Motorists should be prepared for hazardous driving conditions and avoid traversing flooded roads during the Sunday rainfall.
The takeaway
Understanding the intensity of incoming rainfall helps residents mitigate potential water damage to their homes and vehicles. Staying informed about local alerts throughout the weekend will be critical as the storm system moves across the state.
Further reading
For more information on upcoming weather patterns, visit New Jersey Forecasts.
Live Poll
Do you feel adequately prepared for potential flash flooding in your area this weekend?
