Alert archive / New Jersey / Flash Flood Warnings
Flash Flood Warnings in New Jersey, 2026
138 flash flood warnings in 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 2026. Tap one for its archive.
- Flash Flood Warnings
- 138
- Busiest month
- July57 flash flood warnings
- Busiest day
- August 27, 202613 flash flood warnings
Over time
By month
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 |
|---|---|---|---|---|
| May 20, 5:40 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 3 hr |
| Jun 14, 10:26 PM EDT | Flash Flood Warning | PHI | Camden | 3 hr |
| Jun 14, 10:51 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Mercer | 3 hr |
| Jun 14, 11:03 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester, Salem | 2 hr |
| Jun 14, 11:42 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean, Somerset | 117 min |
| Jun 22, 6:26 PM EDT | Flash Flood Warning | PHI | Burlington | 4 hr |
| Jun 22, 6:36 PM EDT | Flash Flood Warning | PHI | Burlington | 3 hr |
| Jun 22, 6:48 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth | 3 hr |
| Jun 22, 7:06 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 3 hr |
| Jun 22, 10:37 PM EDT | Flash Flood Warning | OKX | Essex, Hudson, Union | 2 hr |
| Jun 23, 1:11 AM EDT | Flash Flood Warning | PHI | Morris, Sussex | 3 hr |
| Jun 23, 2:44 AM EDT | Flash Flood Warning | OKX | Bergen, Passaic | 2 hr |
| Jun 26, 1:48 AM EDT | Flash Flood Warning | OKX | Bergen, Passaic | 117 min |
| Jun 28, 7:51 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 114 min |
| Jul 5, 7:30 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer | 2 hr |
| Jul 5, 11:00 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Jul 6, 9:16 AM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 2 hr |
| Jul 6, 9:27 AM EDT | Flash Flood Warning | PHI | Cumberland, Gloucester, Salem | 3 hr |
| Jul 6, 10:15 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Jul 6, 10:27 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Jul 6, 10:38 AM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 4 hr |
| Jul 6, 11:02 AM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 4 hr |
| Jul 6, 11:13 AM EDT | Flash Flood Warning | PHI | Burlington | 3 hr |
| Jul 6, 11:44 AM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Jul 9, 1:22 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 4 hr |
| Jul 9, 1:37 PM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 6 hr |
| Jul 9, 2:00 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 5 hr |
| Jul 9, 2:42 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth | 4 hr |
| Jul 9, 3:01 PM EDT | Flash Flood Warning | PHI | Burlington | 4 hr |
| Jul 9, 4:32 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Jul 9, 7:31 PM EDT | Flash Flood Warning | PHI | Atlantic, Cape May, Cumberland | 119 min |
| Jul 11, 3:06 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester | 4 hr |
| Jul 16, 6:09 PM EDT | Flash Flood Warning | PHI | Ocean | 3 hr |
| Jul 18, 11:53 AM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic, Union | 2 hr |
| Jul 18, 12:40 PM EDT | Flash Flood Warning | PHI | Middlesex, Morris, Somerset | 3 hr |
| Jul 18, 1:52 PM EDT | Flash Flood Warning | PHI | Mercer, Middlesex, Somerset | 4 hr |
| Jul 18, 2:36 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Monmouth | 4 hr |
| Jul 18, 3:14 PM EDT | Flash Flood Warning | PHI | Mercer | 4 hr |
| Jul 18, 3:44 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth, Ocean | 4 hr |
| Jul 18, 4:34 PM EDT | Flash Flood Warning | PHI | Ocean | 4 hr |
| Jul 18, 4:46 PM EDT | Flash Flood Warning | PHI | Ocean | 4 hr |
| Jul 18, 8:21 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic, Union | 2 hr |
| Jul 21, 8:49 AM EDT | Flash Flood Warning | PHI | Sussex, Warren | 2 hr |
| Jul 21, 10:25 AM EDT | Flash Flood Warning | OKX | Bergen, Essex, Passaic | 108 min |
| Jul 21, 2:49 PM EDT | Flash Flood Warning | PHI | Morris | 3 hr |
| Jul 21, 3:07 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic | 3 hr |
| Jul 21, 3:13 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 3 hr |
| Jul 21, 3:38 PM EDT | Flash Flood Warning | OKX | Bergen | 3 hr |
| Jul 21, 4:04 PM EDT | Flash Flood Warning | OKX | Hudson | 3 hr |
| Jul 21, 4:38 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 4 hr |
| Jul 21, 10:38 PM EDT | Flash Flood Warning | PHI | Cape May | 4 hr |
| Jul 27, 5:35 PM EDT | Flash Flood Warning | OKX | Bergen | 3 hr |
| Jul 27, 5:49 PM EDT | Flash Flood Warning | PHI | Middlesex | 3 hr |
| Jul 27, 6:07 PM EDT | Flash Flood Warning | PHI | Atlantic | 4 hr |
| Jul 27, 6:35 PM EDT | Flash Flood Warning | OKX | Bergen, Passaic | 2 hr |
| Jul 27, 6:59 PM EDT | Flash Flood Warning | PHI | Gloucester | 2 hr |
| Jul 27, 7:05 PM EDT | Flash Flood Warning | OKX | Bergen, Hudson | 3 hr |
| Jul 28, 2:04 PM EDT | Flash Flood Warning | PHI | Warren | 10 hr |
| Jul 28, 2:11 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Somerset | 4 hr |
| Jul 28, 2:45 PM EDT | Flash Flood Warning | PHI | Hunterdon, Morris, Warren | 9 hr |
| Jul 28, 3:38 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic, Union | 3 hr |
| Jul 28, 4:02 PM EDT | Flash Flood Warning | PHI | Middlesex | 2 hr |
| Jul 28, 6:17 PM EDT | Flash Flood Warning | PHI | Hunterdon, Warren | 6 hr |
| Jul 28, 7:11 PM EDT | Flash Flood Warning | PHI | Camden, Gloucester, Salem | 3 hr |
| Jul 28, 7:55 PM EDT | Flash Flood Warning | PHI | Hunterdon | 4 hr |
| Jul 28, 10:39 PM EDT | Flash Flood Warning | PHI | Morris | 4 hr |
| Jul 28, 10:50 PM EDT | Flash Flood Warning | OKX | Bergen, Passaic | 2 hr |
| Jul 28, 10:55 PM EDT | Flash Flood Warning | OKX | Essex, Hudson, Union | 3 hr |
| Jul 28, 11:14 PM EDT | Flash Flood Warning | OKX | Bergen, Essex, Passaic | 4 hr |
| Jul 28, 11:59 PM EDT | Flash Flood Warning | PHI | Monmouth, Ocean | 4 hr |
| Jul 29, 12:56 AM EDT | Flash Flood Warning | PHI | Ocean | 3 hr |
| 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 |
| Sep 1, 7:05 PM EDT | Flash Flood Warning | OKX | Essex, Union | 82 min |
| Sep 1, 7:13 PM EDT | Flash Flood Warning | PHI | Morris | 2 hr |
| Sep 1, 8:44 PM EDT | Flash Flood Warning | PHI | Gloucester, Salem | 3 hr |
| Sep 1, 9:19 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex | 116 min |
| Sep 1, 9:26 PM EDT | Flash Flood Warning | PHI | Atlantic, Camden, Gloucester | 115 min |
| Sep 3, 1:34 AM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Sep 5, 1:13 AM EDT | Flash Flood Warning | PHI | Cape May, Cumberland | 2 hr |
| Sep 13, 5:54 AM EDT | Flash Flood Warning | PHI | Morris | 6 hr |
| Sep 13, 6:35 AM EDT | Flash Flood Warning | OKX | Bergen, Essex, Hudson, Passaic | 6 hr |
| Sep 13, 8:06 AM EDT | Flash Flood Warning | PHI | Mercer, Middlesex | 4 hr |
| Sep 13, 8:21 AM EDT | Flash Flood Warning | OKX | Bergen | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Burlington County27
- Gloucester County27
- Camden County26
- Bergen County24
- Mercer County23
- Middlesex County21
- Essex County19
- Somerset County16
- Hudson County16
- Passaic County16
- Hunterdon County16
- Salem County14
- Morris County14
- Monmouth County12
- Ocean County12
- Union County12
- Warren County11
- Atlantic County8
- Cumberland County7
- Sussex County5
- Cape May County4
The busiest days
Days with the most alerts issued, by UTC date.
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. Rebuilt daily.