National Weather ServiceNew HampshireSevere Thunderstorm WarningArchive to October 1, 2026
Severe Thunderstorm Warnings in New Hampshire
The National Weather Service issued 35 severe thunderstorm warnings for New Hampshire in 2025 and 72 a year on average in 2008-2025; in 2021-2025 it had the 45th most of any state. 2026 through September: 43, 39% below the average of 70 for those months in 2008-2025. Grafton was covered most often (356 times since 2008).
How many severe thunderstorm warnings does New Hampshire get?
Every severe thunderstorm warning that covered part of New Hampshire. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 43 |
| 2025 | 35 |
| 2024 | 53 |
| 2023 | 42 |
| 2022 | 72 |
| 2021 | 63 |
| 2020 | 77 |
| 2019 | 30 |
| 2018 | 68 |
| 2017 | 58 |
| 2016 | 54 |
| 2015 | 93 |
| 2014 | 92 |
| 2013 | 93 |
| 2012 | 78 |
| 2011 | 94 |
| 2010 | 61 |
| 2009 | 67 |
| 2008 | 165 |
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 New Hampshire 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 New Hampshire?
| County or forecast zone | Since 2008 | Since 2023 | Last issued |
|---|---|---|---|
| Grafton | 356 | 42 | August 3, 2026 |
| Carroll | 353 | 32 | August 8, 2026 |
| Merrimack | 345 | 61 | July 16, 2026 |
| Hillsborough | 316 | 58 | July 28, 2026 |
| Coos | 268 | 28 | August 3, 2026 |
| Belknap | 261 | 23 | July 16, 2026 |
| Cheshire | 254 | 38 | July 16, 2026 |
| Rockingham | 253 | 50 | July 28, 2026 |
| Strafford | 251 | 30 | August 8, 2026 |
| Sullivan | 185 | 30 | July 15, 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 New Hampshire in AreaZine's record
NWS GrayWarningAugust 8, 2026
Severe Thunderstorm Warning: York, Carroll and Strafford, ME and NH
Expired 5:30 p.m. EDT, August 8, 2026
NWS GrayWarningAugust 3, 2026
Severe Thunderstorm Warning: Grafton, NH
Expired 3:00 p.m. EDT, August 3, 2026
NWS GrayWarningJuly 28, 2026
Severe Thunderstorm Warning: Hillsborough and Rockingham, NH
Expired 3:45 p.m. EDT, July 28, 2026
NWS GrayWarningJuly 16, 2026
Severe Thunderstorm Warning: Rockingham, NH
Expired 5:45 p.m. EDT, July 16, 2026
NWS GrayWarningJuly 16, 2026
Severe Thunderstorm Warning: Cheshire, Hillsborough and Rockingham, NH
Expired 5:30 p.m. EDT, July 16, 2026
NWS GrayWarningJuly 16, 2026
Severe Thunderstorm Warning: York, Rockingham and Strafford, ME and NH
Expired 4:30 p.m. EDT, July 16, 2026
NWS GrayWarningJuly 15, 2026
Severe Thunderstorm Warning: Cheshire, Hillsborough and Sullivan, NH
Expired 5:15 a.m. EDT, July 15, 2026
NWS GrayWarningJuly 15, 2026
Severe Thunderstorm Warning: Cheshire, Hillsborough, Merrimack and 1 more, NH
Expired 4:30 a.m. EDT, July 15, 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 New Hampshire.