National Weather ServiceNew JerseyFlash Flood WarningArchive to October 1, 2026
Flash Flood Warnings in New Jersey
The National Weather Service issued 62 flash flood warnings for New Jersey in 2025 and 46 a year on average in 2008-2025; in 2021-2025 it had the 27th most of any state. 2026 through September: 138, 209% above the average of 45 for those months in 2008-2025. Burlington was covered most often (190 times since 2008).
How many flash flood warnings does New Jersey get?
Every flash flood warning that covered part of New Jersey. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 138 |
| 2025 | 62 |
| 2024 | 47 |
| 2023 | 64 |
| 2022 | 27 |
| 2021 | 85 |
| 2020 | 45 |
| 2019 | 60 |
| 2018 | 79 |
| 2017 | 25 |
| 2016 | 30 |
| 2015 | 34 |
| 2014 | 46 |
| 2013 | 53 |
| 2012 | 38 |
| 2011 | 44 |
| 2010 | 9 |
| 2009 | 41 |
| 2008 | 37 |
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
When in the year does New Jersey get them?
Sum of 2008-2025; the busiest month is labelled.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
Where in New Jersey?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Burlington | 190 | 66 | September 3, 2026 |
| Bergen | 188 | 47 | September 13, 2026 |
| Camden | 146 | 58 | September 3, 2026 |
| Essex | 143 | 30 | September 13, 2026 |
| Passaic | 137 | 32 | September 13, 2026 |
| Gloucester | 131 | 47 | September 3, 2026 |
| Somerset | 128 | 33 | August 27, 2026 |
| Hudson | 127 | 32 | September 13, 2026 |
| Mercer | 125 | 41 | September 13, 2026 |
| Middlesex | 121 | 38 | September 13, 2026 |
| Hunterdon | 114 | 35 | September 2, 2026 |
| Morris | 108 | 34 | September 13, 2026 |
The NWS issues these products for counties or forecast zones; a zone can be part of a county or a mountain range.
Source: Iowa Environmental Mesonet archive of National Weather Service watches, warnings and advisories (VTEC); National Weather Service. Data as of October 1, 2026.
The latest flash flood warnings for New Jersey in AreaZine's record
NWS UptonWarningSeptember 13, 2026
Flash Flood Warning: Bergen and Rockland, NJ and NY
Expired 11:15 a.m. EDT, September 13, 2026
NWS Mount HollyWarningSeptember 13, 2026
Flash Flood Warning: Mercer, Middlesex, Bucks and 3 more, NJ and PA
Expired 12:00 p.m. EDT, September 13, 2026
NWS UptonWarningSeptember 13, 2026
Flash Flood Warning: Bergen, Essex, Hudson and 1 more, NJ
Expired 9:30 a.m. EDT, September 13, 2026
NWS Mount HollyWarningSeptember 13, 2026
Flash Flood Warning: Morris, NJ
Expired 10:00 a.m. EDT, September 13, 2026
NWS Mount HollyWarningSeptember 5, 2026
Flash Flood Warning: Cape May and Cumberland, NJ
Expired 5:15 a.m. EDT, September 5, 2026
NWS Mount HollyWarningSeptember 3, 2026
Flash Flood Warning: New Castle, Burlington, Camden and 6 more, DE and NJ
Expired 5:30 a.m. EDT, September 3, 2026
NWS Mount HollyWarningSeptember 1, 2026
Flash Flood Warning: Atlantic, Camden and Gloucester, NJ
Expired 1:30 a.m. EDT, September 2, 2026
NWS Mount HollyWarningSeptember 1, 2026
Flash Flood Warning: Hunterdon, Mercer, Middlesex and 1 more, NJ and PA
Expired 1:15 a.m. EDT, September 2, 2026
This list is AreaZine's record of the NWS alert feed, kept since April 6, 2026; the counts above come from the complete IEM archive.
Source: National Weather Service alerts (api.weather.gov).
What is a flash flood warning?
A flash flood warning means flash flooding is happening or about to happen: water rising fast in streams, streets or dry washes, usually within six hours of heavy rain or a dam or levee failure. A warning means the hazard is happening, about to happen, or very likely: act now to protect people and property. The national record · Every warning type in New Jersey.