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Flood Watch

Status

New Event Active alert

Start Time

Thu 08/20/2026 12:00 PM EDT

End Time

Fri 08/21/2026 02:00 AM EDT

Significance

Watch

Impacts

Moderate impact

Locations Affected

Philadelphia, PA ∙ Trenton, NJ ∙ Wilmington, DE ∙ Camden, NJ ∙ Vineland, NJ ∙ New Brunswick, NJ ∙ Perth Amboy, NJ ∙ Haverford College, PA ∙ Pleasantville, DE ∙ Everett, NJ

Full Alert Message

URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ Issued by National Weather Service New York NY 208 PM EDT Wed Aug 19 2026 ...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northern Delaware, including the following area, New Castle, New Jersey, including the following areas, Atlantic, Camden, Coastal Atlantic, Coastal Ocean, Cumberland, Eastern Monmouth, Gloucester, Hunterdon, Mercer, Middlesex, Northwestern Burlington, Ocean, Salem, Somerset, Southeastern Burlington 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 Thursday afternoon through late Thursday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Multiple rounds of showers and thunderstorms are expected across the area beginning Thursday afternoon through Thursday evening. Rainfall rates of 1 to 3 inches per hour are possible. Rainfall amounts of 1 to 2 inches are possible with localized amounts of 3 to 5 inches which could cause 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.

Technical Header

DEZ001-NJZ009-010-012>022-025>027-PAZ070-071-101>106-200900- /O.NEW.KPHI.FA.A.0008.260820T1600Z-260821T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Hunterdon-Somerset-Middlesex-Western Monmouth-Eastern Monmouth-Mercer-Salem-Gloucester-Camden-Northwestern Burlington- Ocean-Cumberland-Atlantic-Coastal Atlantic-Coastal Ocean- Southeastern Burlington-Delaware-Philadelphia-Western Chester- Eastern Chester-Western Montgomery-Eastern Montgomery-Upper Bucks- Lower Bucks- Including the cities of Camden, Flemington, Oxford, West Chester, Pennsville, Trenton, Perkasie, Wilmington, Collegeville, Doylestown, Lansdale, New Brunswick, Kennett Square, Media, Sandy Hook, Chalfont, Atlantic City, Pottstown, Philadelphia, Norristown, Morrisville, Wharton State Forest, Cherry Hill, Hammonton, Honey Brook, Moorestown, Long Beach Island, Somerville, Mount Holly, Jackson, Millville, Glassboro, and Freehold 208 PM EDT Wed Aug 19 2026