National Weather ServiceNew JerseyFlood WarningArchive to October 1, 2026
Flood Warnings in New Jersey
The National Weather Service issued 25 flood warnings for New Jersey in 2025 and 70 a year on average in 2008-2025; in 2021-2025 it had the 23rd most of any state. 2026 through September: 25, 52% below the average of 52 for those months in 2008-2025. Somerset was covered most often (365 times since 2008).
How many flood warnings does New Jersey get?
Every flood warning that covered part of New Jersey. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 25 |
| 2025 | 25 |
| 2024 | 118 |
| 2023 | 116 |
| 2022 | 35 |
| 2021 | 106 |
| 2020 | 47 |
| 2019 | 31 |
| 2018 | 148 |
| 2017 | 27 |
| 2016 | 19 |
| 2015 | 15 |
| 2014 | 47 |
| 2013 | 51 |
| 2012 | 33 |
| 2011 | 242 |
| 2010 | 98 |
| 2009 | 38 |
| 2008 | 61 |
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 |
|---|---|---|---|
| Somerset | 365 | 83 | September 28, 2026 |
| Morris | 313 | 70 | July 15, 2025 |
| Passaic | 239 | 49 | July 15, 2025 |
| Hunterdon | 234 | 52 | September 27, 2026 |
| Bergen | 182 | 36 | September 13, 2026 |
| Middlesex | 147 | 27 | August 28, 2026 |
| Burlington | 139 | 30 | September 3, 2026 |
| Mercer | 138 | 30 | August 28, 2026 |
| Warren | 128 | 26 | August 7, 2026 |
| Essex | 114 | 31 | July 15, 2025 |
| Gloucester | 82 | 18 | September 3, 2026 |
| Cumberland | 81 | 9 | August 1, 2025 |
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 flood warnings for New Jersey in AreaZine's record
NWS Mount HollyWarningSeptember 28, 2026
Flood Warning: Monmouth and Ocean, NJ
Expired 10:30 a.m. EDT, September 28, 2026
NWS Mount HollyWarningSeptember 27, 2026
Flood Warning: Somerset, NJ
Expired 8:00 a.m. EDT, September 29, 2026
NWS Mount HollyWarningSeptember 27, 2026
Flood Warning: Hunterdon, NJ
Expired 3:00 p.m. EDT, September 27, 2026
NWS Mount HollyWarningSeptember 27, 2026
Flood Warning: Hunterdon, NJ
Expired 11:00 a.m. EDT, September 27, 2026
NWS UptonWarningSeptember 13, 2026
Flood Warning: Bergen, NJ
Expired 4:00 p.m. EDT, September 13, 2026
NWS Mount HollyWarningSeptember 3, 2026
Flood Warning: New Castle, Burlington, Camden and 7 more, DE and NJ
Expired 9:15 a.m. EDT, September 3, 2026
NWS Mount HollyWarningAugust 27, 2026
Flood Warning: Burlington, Hunterdon, Mercer and 4 more, NJ and PA
Expired 3:00 a.m. EDT, August 28, 2026
NWS Mount HollyWarningAugust 27, 2026
Flood Warning: Middlesex and Monmouth, NJ
Expired 10:30 p.m. EDT, August 27, 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 flood warning?
A flood warning means flooding is happening or about to happen. The NWS issues it both for rivers at forecast points (river flood warnings) and for areas where water ponds or runs off (areal flood warnings); AreaZine counts both. 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.