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HomeWeather news → Flood Watch Issued for Portions of New Jersey, Delaware, and Pennsylvania
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Flood Watch Issued for Portions of New Jersey, Delaware, and Pennsylvania

September 12, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Mount Holly, New Jersey, has issued a Flood Watch for multiple areas across New Jersey, Delaware, and Pennsylvania from midnight tonight through Sunday morning.

According to the National Weather Service, flooding caused by excessive rainfall continues to be possible across the region. The affected areas include portions of northern Delaware, including New Castle; several areas in New Jersey, such as Camden, Coastal Ocean, Eastern Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Ocean, Salem, Somerset, Southeastern Burlington, and Western Monmouth; and southeast Pennsylvania, including Delaware, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, and Western Montgomery.

Showers and thunderstorms are expected to move into the area around or shortly after midnight. These conditions will continue for several hours before tapering off by around mid to late morning on Sunday.

Some of these showers and thunderstorms will be capable of producing heavy rainfall. In the heaviest storms, as much as 1 to 2 inches of rain is possible within a short window of time.

The excessive runoff may result in the flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.

Why it is dangerous and what to do

⚠️ Safety
• Monitor later forecasts.
• Be alert for possible Flood Warnings.
• Be prepared to take action should flooding develop if you live in an area prone to flooding.
📊 The numbers, from wweather1 data
Philadelphia: now +24°, Clear.
That is 3° above the September climate norm.
The record for this date is +33° (1961).
Three-day forecast: 12 September: +28°/+17° · 13 September: +29°/+21° · 14 September: +26°/+18°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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