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NWS Issues Flood Watch for Portions of Delaware, New Jersey, and Pennsylvania

September 13, 2026 · wweather1 editorial · 2 min read

The National Weather Service in Mount Holly, New Jersey, has issued a Flood Watch in effect until 12:00 PM EDT on September 13 for parts of northern Delaware, New Jersey, and southeastern Pennsylvania.

The National Weather Service office in Mount Holly, New Jersey, issued the Flood Watch at 2:46 AM EDT on September 13. The alert covers the region through 12:00 PM EDT as showers and thunderstorms continue to move through during the morning hours.

Heavy rainfall in a short amount of time may produce excessive runoff. This runoff increases the risk of potential flooding along rivers, creeks, streams, and other low-lying or flood-prone locations.

In northern Delaware, the watch covers New Castle. In New Jersey, affected areas include Camden, Coastal Ocean, Eastern Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Ocean, Salem, Somerset, Southeastern Burlington, and Western Monmouth.

In southeastern Pennsylvania, the watch includes Delaware, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, and Western Montgomery. Residents across all designated areas are advised to stay updated on changing weather conditions.

Why it is dangerous and what to do

⚠️ Safety
• Monitor local weather forecasts for updates and potential Flood Warnings.
• Be prepared to take quick action if flooding develops in your immediate area.
• Keep clear of creeks, streams, and low-lying areas that are prone to rapid flooding.
📊 The numbers, from wweather1 data
Philadelphia: now +23°, Clear.
That is 5° above the October climate norm.
The record for this date is +29° (1954).
Three-day forecast: 13 October: +24°/+13° · 14 October: +25°/+17° · 15 October: +20°/+13°
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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