What: Flash flooding caused by excessive rainfall is possible.
Where: Portions of New Jersey, including the following areas, Camden, Cumberland, Gloucester, Hunterdon, Mercer, Middlesex, Northwestern Burlington, Salem, 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: From 10 AM EDT this morning through this evening.
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: - The remnants of Chantal will move into the Mid Atlantic this morning bringing areas of heavy rain. The tropical airmass will bring generally 1 to 2 inches of rainfall across the urban corridor but will have the potential to bring isolated amounts up to 5 inches leading to flash flooding. The showers and thunderstorms will generally come to an end by 7 to 8 pm this evening with any residual flooding from showers today coming to an end during the overnight hours. - http://www.weather.gov/safety/flood
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. Those living in areas prone to flooding should be prepared to take action should flooding develop.