National Weather ServiceDelawareFlood AdvisoryArchive to October 1, 2026
Flood Advisories in Delaware
The National Weather Service issued 0 flood advisories for Delaware in 2025 and 40 a year on average in 2008-2025; in 2021-2025 it had the 45th most of any state. 2026 through September: 0, 100% below the average of 38 for those months in 2008-2025. New Castle was covered most often (430 times since 2008).
How many flood advisories does Delaware get?
Every flood advisory that covered part of Delaware. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 0 |
| 2025 | 0 |
| 2024 | 3 |
| 2023 | 32 |
| 2022 | 26 |
| 2021 | 44 |
| 2020 | 43 |
| 2019 | 52 |
| 2018 | 101 |
| 2017 | 65 |
| 2016 | 50 |
| 2015 | 59 |
| 2014 | 40 |
| 2013 | 47 |
| 2012 | 53 |
| 2011 | 57 |
| 2010 | 24 |
| 2009 | 25 |
| 2008 | 5 |
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 Delaware 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 Delaware?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| New Castle | 430 | 28 | March 23, 2024 |
| Kent | 293 | 8 | August 7, 2023 |
| Sussex | 279 | 6 | September 11, 2023 |
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.
What is a flood advisory?
A flood advisory covers flooding that is less serious than a warning, such as water on roads or in low-lying areas, that is still a hazard to drivers and walkers. An advisory is issued for a hazard less serious than a warning that can still cause inconvenience or danger if people are not careful. The national record · Every warning type in Delaware.