National Weather ServiceConnecticutSevere Thunderstorm WarningArchive to October 1, 2026
Severe Thunderstorm Warnings in Connecticut
The National Weather Service issued 65 severe thunderstorm warnings for Connecticut in 2025 and 81 a year on average in 2008-2025; in 2021-2025 it had the 41st most of any state. 2026 through September: 70, 10% below the average of 78 for those months in 2008-2025. Hartford was covered most often (371 times since 2008).
How many severe thunderstorm warnings does Connecticut get?
Every severe thunderstorm warning that covered part of Connecticut. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 70 |
| 2025 | 65 |
| 2024 | 90 |
| 2023 | 66 |
| 2022 | 59 |
| 2021 | 91 |
| 2020 | 111 |
| 2019 | 69 |
| 2018 | 52 |
| 2017 | 62 |
| 2016 | 77 |
| 2015 | 37 |
| 2014 | 75 |
| 2013 | 69 |
| 2012 | 103 |
| 2011 | 87 |
| 2010 | 91 |
| 2009 | 104 |
| 2008 | 148 |
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 | 371 | 75 | August 8, 2026 |
| Tolland | 363 | 75 | August 13, 2026 |
| Fairfield | 361 | 75 | August 27, 2026 |
| Litchfield | 359 | 67 | August 8, 2026 |
| Windham | 327 | 68 | August 13, 2026 |
| New Haven | 243 | 55 | August 27, 2026 |
| Middlesex | 154 | 28 | July 5, 2026 |
| New London | 140 | 22 | July 5, 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.
The latest severe thunderstorm warnings for Connecticut in AreaZine's record
NWS UptonWarningAugust 13, 2026
Severe Thunderstorm Warning: Fairfield, Orange, Putnam and 1 more, CT and NY
Expired 1:15 a.m. EDT, August 13, 2026
NWS UptonWarningAugust 11, 2026
Severe Thunderstorm Warning: New Haven, CT
Expired 6:45 p.m. EDT, August 11, 2026
NWS Boston/NortonWarningAugust 8, 2026
Severe Thunderstorm Warning: Hartford, Hampden and Hampshire, CT and MA
Expired 6:15 p.m. EDT, August 8, 2026
NWS Boston/NortonWarningAugust 7, 2026
Severe Thunderstorm Warning: Tolland, Windham, Hampden and 3 more, CT and MA
Expired 9:45 p.m. EDT, August 7, 2026
NWS Boston/NortonWarningAugust 7, 2026
Severe Thunderstorm Warning: Hartford, Tolland, Windham and 1 more, CT and MA
Expired 9:45 p.m. EDT, August 7, 2026
NWS Boston/NortonWarningAugust 7, 2026
Severe Thunderstorm Warning: Hartford, CT
Expired 8:45 p.m. EDT, August 7, 2026
NWS UptonWarningAugust 7, 2026
Severe Thunderstorm Warning: Fairfield, Bronx, Kings and 3 more, CT and NY
Expired 7:15 p.m. EDT, August 7, 2026
NWS AlbanyWarningJuly 27, 2026
Severe Thunderstorm Warning: Litchfield, CT
Expired 8:15 p.m. EDT, July 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 severe thunderstorm warning?
A severe thunderstorm warning means a storm is producing, or is about to produce, hail one inch across or larger and/or winds of 58 mph or more. 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 Connecticut.