* 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, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Somerset, Sussex 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 noon EDT today through late tonight. * IMPACTS...Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Showers and thunderstorms are expected to develop by mid-day Thursday. Some of these showers and thunderstorms are expected to produce very heavy rainfall. Rainfall totals of 1-2 inches of rain can be expected with localized amounts of 3-5 inches possible in the strongest storms. Rainfall rates within these thunderstorms may reach up to 1 to 3 inches per hour at times. - http://www.weather.gov/safety/flood
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
AI Weather Forecast · Thursday, August 27, 2026
7 AM – 6 PM
Showers and thunderstorms likely between 8am and 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and thunderstorms. Mostly cloudy. High near 83, with temperatures falling to around 80 in the afternoon. South wind 2 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
6 PM – 6 AM
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms between 8pm and 1am, then patchy fog and a chance of showers and thunderstorms between 1am and 5am. Mostly cloudy, with a low around 67. South wind 0 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.