National Weather ServiceConnecticutFlash Flood WatchArchive to October 1, 2026
Flash Flood Watches in Connecticut
The National Weather Service issued 0 flash flood watches for Connecticut in 2025 and 10 a year on average in 2008-2025; in 2021-2025 it had the 28th most of any state. 2026 through September: 0, 100% below the average of 9 for those months in 2008-2025. Hartford was covered most often (60 times since 2008).
How many flash flood watches does Connecticut get?
Every flash flood watch that covered part of Connecticut. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 0 |
| 2025 | 0 |
| 2024 | 1 |
| 2023 | 0 |
| 2022 | 0 |
| 2021 | 21 |
| 2020 | 6 |
| 2019 | 10 |
| 2018 | 25 |
| 2017 | 16 |
| 2016 | 5 |
| 2015 | 11 |
| 2014 | 16 |
| 2013 | 26 |
| 2012 | 6 |
| 2011 | 7 |
| 2010 | 4 |
| 2009 | 15 |
| 2008 | 9 |
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 |
|---|---|---|---|
| Hartford | 60 | 0 | September 24, 2021 |
| Southern Fairfield | 55 | 0 | October 26, 2021 |
| Northern Fairfield | 53 | 0 | October 26, 2021 |
| Tolland | 53 | 0 | September 1, 2021 |
| Northern Litchfield | 52 | 0 | September 24, 2021 |
| Southern Litchfield | 52 | 0 | September 24, 2021 |
| Windham | 52 | 0 | September 1, 2021 |
| Southern New Haven | 49 | 0 | October 26, 2021 |
| Northern New Haven | 48 | 0 | October 26, 2021 |
| Northern New London | 44 | 1 | January 10, 2024 |
| Northern Middlesex | 43 | 0 | October 26, 2021 |
| Southern Middlesex | 42 | 0 | October 26, 2021 |
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 flash flood watch?
A flash flood watch means the rain or conditions that lead to flash flooding are possible in the coming hours. Since 2022 most NWS offices issue a flood watch in its place: the national count fell from 692 in 2021 to 76 in 2022, while flood watches rose from 203 to 715 (IEM archive), so compare the two together. A watch means the conditions for the hazard are possible or favourable, but it is not yet happening: be ready to act if a warning follows. The national record · Every warning type in Connecticut.