Alert archive / New Jersey / Flash Flood Warnings / 2026
Flash Flood Warnings in New Jersey, August 2026
56 flash flood warnings in August 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in August 2026. Tap one for its archive.
- Flash Flood Warnings
- 56
- Busiest day
- August 27, 202613 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 11:20 PM EDT | Flash Flood Warning | PHI | Warren | 4 hr |
| Aug 3, 12:05 AM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 3 hr |
| Aug 3, 2:50 AM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Morris, Somerset | 4 hr |
| Aug 3, 3:20 AM EDT | Flash Flood Warning | OKX | Bergen, Essex, Passaic | 4 hr |
| Aug 3, 4:41 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Somerset | 2 hr |
| Aug 3, 5:41 AM EDT | Flash Flood Warning | OKX | Essex, Hudson, Union | 6 hr |
| Aug 3, 5:59 AM EDT | Flash Flood Warning | PHI | Middlesex, Somerset | 4 hr |
| Aug 3, 9:08 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer, Salem | 3 hr |
| Aug 3, 10:12 AM EDT | Flash Flood Warning | PHI | Atlantic, Cumberland, Salem | 86 min |
| Aug 3, 10:36 AM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset | 6 hr |
| Aug 3, 10:44 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 6 hr |
| Aug 3, 12:12 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Passaic | 2 hr |
| Aug 5, 12:58 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 6 hr |
| Aug 5, 1:13 PM EDT | Flash Flood Warning | PHI | Gloucester | 5 hr |
| Aug 5, 1:23 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 4 hr |
| Aug 5, 2:50 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer | 4 hr |
| Aug 5, 3:33 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 86 min |
| Aug 5, 5:29 PM EDT | Flash Flood Warning | PHI | Middlesex | 3 hr |
| Aug 5, 11:40 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset | 4 hr |
| Aug 6, 12:25 AM EDT | Flash Flood Warning | OKX | Bergen, Passaic | 3 hr |
| Aug 6, 12:31 AM EDT | Flash Flood Warning | PHI | Morris | 4 hr |
| Aug 7, 4:24 PM EDT | Flash Flood Warning | PHI | Sussex, Warren | 4 hr |
| Aug 7, 4:56 PM EDT | Flash Flood Warning | OKX | Bergen | 2 hr |
| Aug 7, 4:56 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 3 hr |
| Aug 7, 5:01 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 3 hr |
| Aug 7, 5:18 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Somerset, Sussex | 3 hr |
| Aug 7, 5:34 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 3 hr |
| Aug 7, 5:42 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Morris, Somerset | 3 hr |
| Aug 7, 5:50 PM EDT | Flash Flood Warning | OKX | Bergen | 3 hr |
| Aug 7, 5:54 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic, Union | 2 hr |
| Aug 7, 6:39 PM EDT | Flash Flood Warning | PHI | Monmouth | 3 hr |
| Aug 16, 11:38 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Aug 17, 4:43 AM EDT | Flash Flood Warning | PHI | Cumberland, Salem | 2 hr |
| Aug 20, 4:41 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May, Cumberland | 4 hr |
| Aug 20, 5:24 PM EDT | Flash Flood Warning | PHI | Atlantic | 4 hr |
| Aug 20, 5:39 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic, Union | 2 hr |
| Aug 20, 5:39 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester, Salem | 4 hr |
| Aug 20, 6:26 PM EDT | Flash Flood Warning | PHI | Mercer | 4 hr |
| Aug 23, 4:27 AM EDT | Flash Flood Warning | PHI | Cumberland | 4 hr |
| Aug 23, 6:12 AM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Union | 108 min |
| Aug 27, 11:38 AM EDT | Flash Flood Warning | PHI | Gloucester | 4 hr |
| Aug 27, 12:35 PM EDT | Flash Flood Warning | OKX | Essex, Hudson, Union | 2 hr |
| Aug 27, 12:41 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester, Salem | 5 hr |
| Aug 27, 1:07 PM EDT | Flash Flood Warning | PHI | Middlesex, Somerset | 4 hr |
| Aug 27, 1:17 PM EDT | Flash Flood Warning | PHI | Mercer, Somerset | 7 hr |
| Aug 27, 1:27 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson | 5 hr |
| Aug 27, 1:50 PM EDT | Flash Flood Warning | PHI | Salem | 4 hr |
| Aug 27, 2:18 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 4 hr |
| Aug 27, 2:38 PM EDT | Flash Flood Warning | PHI | Camden | 4 hr |
| Aug 27, 3:33 PM EDT | Flash Flood Warning | OKX | Essex, Hudson, Union | 3 hr |
| Aug 27, 3:43 PM EDT | Flash Flood Warning | PHI | Camden | 3 hr |
| Aug 27, 4:52 PM EDT | Flash Flood Warning | PHI | Warren | 3 hr |
| Aug 27, 7:00 PM EDT | Flash Flood Warning | PHI | Burlington, Camden | 3 hr |
| Aug 28, 1:03 PM EDT | Flash Flood Warning | PHI | Atlantic | 4 hr |
| Aug 28, 1:48 PM EDT | Flash Flood Warning | PHI | Atlantic, Burlington, Ocean | 4 hr |
| Aug 28, 2:58 PM EDT | Flash Flood Warning | PHI | Ocean | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mercer County10
- Burlington County10
- Camden County10
- Somerset County9
- Bergen County9
- Essex County9
- Gloucester County9
- Hunterdon County8
- Warren County7
- Middlesex County7
- Hudson County7
- Morris County6
- Union County6
- Salem County6
- Passaic County5
- Atlantic County5
- Cumberland County4
- Monmouth County3
- Ocean County3
- Sussex County3
- Cape May County1
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.