National Weather ServiceConnecticutFlood AdvisoryArchive to October 1, 2026
Flood Advisories in Connecticut
The National Weather Service issued 34 flood advisories for Connecticut in 2025 and 81 a year on average in 2008-2025; in 2021-2025 it had the 34th most of any state. 2026 through September: 40, 45% below the average of 72 for those months in 2008-2025. Fairfield was covered most often (513 times since 2008).
How many flood advisories does Connecticut get?
Every flood advisory that covered part of Connecticut. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 40 |
| 2025 | 34 |
| 2024 | 60 |
| 2023 | 121 |
| 2022 | 52 |
| 2021 | 58 |
| 2020 | 40 |
| 2019 | 54 |
| 2018 | 143 |
| 2017 | 52 |
| 2016 | 41 |
| 2015 | 48 |
| 2014 | 103 |
| 2013 | 140 |
| 2012 | 92 |
| 2011 | 136 |
| 2010 | 85 |
| 2009 | 105 |
| 2008 | 97 |
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 Connecticut 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 Connecticut?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Fairfield | 513 | 134 | September 13, 2026 |
| New Haven | 440 | 111 | September 13, 2026 |
| New London | 337 | 56 | September 13, 2026 |
| Middlesex | 333 | 66 | September 13, 2026 |
| Litchfield | 290 | 49 | August 13, 2025 |
| Hartford | 200 | 0 | April 15, 2019 |
| Tolland | 194 | 0 | April 15, 2019 |
| Windham | 170 | 0 | April 15, 2019 |
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 Connecticut.