National Weather ServiceConnecticutSevere Thunderstorm WatchArchive to October 1, 2026
Severe Thunderstorm Watches in Connecticut
The National Weather Service issued 7 severe thunderstorm watches for Connecticut in 2025 and 11 a year on average in 2008-2025; in 2021-2025 it had the 37th most of any state. 2026 through September: 11, in line with the average of 11 for those months in 2008-2025. Litchfield was covered most often (155 times since 2008).
How many severe thunderstorm watches does Connecticut get?
Every severe thunderstorm watch that covered part of Connecticut. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 11 |
| 2025 | 7 |
| 2024 | 8 |
| 2023 | 12 |
| 2022 | 11 |
| 2021 | 18 |
| 2020 | 9 |
| 2019 | 10 |
| 2018 | 5 |
| 2017 | 9 |
| 2016 | 6 |
| 2015 | 8 |
| 2014 | 11 |
| 2013 | 12 |
| 2012 | 15 |
| 2011 | 15 |
| 2010 | 14 |
| 2009 | 12 |
| 2008 | 22 |
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 |
|---|---|---|---|
| Litchfield | 155 | 28 | August 27, 2026 |
| Fairfield | 133 | 26 | August 27, 2026 |
| Hartford | 127 | 20 | August 8, 2026 |
| Tolland | 117 | 19 | August 8, 2026 |
| New Haven | 113 | 21 | August 8, 2026 |
| Windham | 102 | 17 | August 8, 2026 |
| Middlesex | 89 | 17 | August 8, 2026 |
| New London | 78 | 14 | July 4, 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.
What is a severe thunderstorm watch?
Severe thunderstorm watches come from the NWS Storm Prediction Center when storms with large hail or damaging winds are possible over a large area for several hours. 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.