Flood Watch

Locations Affected

Philadelphia, PA ∙ Trenton, NJ ∙ Wilmington, DE ∙ Camden, NJ ∙ New Brunswick, NJ ∙ Perth Amboy, NJ ∙ Pocopson, PA ∙ Southard, NJ ∙ Princeton, NJ ∙ Malvern, PA

Full Alert Message

Flood Watch National Weather Service Mount Holly NJ 307 AM EDT Tue Jul 21 2026 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of northern Delaware, including the following area, New Castle, New Jersey, including the following areas, Camden, Eastern Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Somerset and Western Monmouth, and southeast Pennsylvania, including the following areas, Delaware, Eastern Chester, Eastern Montgomery, Lower Bucks, Philadelphia, Upper Bucks, Western Chester and Western Montgomery. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Showers and thunderstorms will increase today into tonight, with the most widespread activity occurring this afternoon and this evening. Some heavy showers and thunderstorms will produce torrential rainfall, with 2 to 3 inches of rain per hour possible. The excessive rainfall within a short period of time, especially in urban areas, could lead to flash flooding. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

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