National Weather ServiceNew HampshireRed Flag WarningArchive to October 1, 2026
Red Flag Warnings in New Hampshire
The National Weather Service issued 1 red flag warnings for New Hampshire in 2025 and 4 a year on average in 2008-2025; in 2021-2025 it had the 48th most of any state. 2026 through September: 0, 100% below the average of 3 for those months in 2008-2025. Western And Central Hillsborough was covered most often (38 times since 2008).
How many red flag warnings does New Hampshire get?
Every red flag warning that covered part of New Hampshire. 2026 is an outline: the year is not over.
The numbers
| Year | Count |
|---|---|
| 2026 (through September) | 0 |
| 2025 | 1 |
| 2024 | 3 |
| 2023 | 0 |
| 2022 | 2 |
| 2021 | 3 |
| 2020 | 2 |
| 2019 | 1 |
| 2018 | 1 |
| 2017 | 0 |
| 2016 | 6 |
| 2015 | 8 |
| 2014 | 0 |
| 2013 | 2 |
| 2012 | 14 |
| 2011 | 0 |
| 2010 | 5 |
| 2009 | 10 |
| 2008 | 6 |
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 |
|---|---|---|---|
| Western And Central Hillsborough | 38 | 0 | April 27, 2021 |
| Cheshire | 37 | 0 | April 27, 2021 |
| Eastern Hillsborough | 37 | 0 | April 27, 2021 |
| Merrimack | 34 | 0 | April 27, 2021 |
| Strafford | 34 | 0 | April 27, 2021 |
| Belknap | 33 | 0 | April 27, 2021 |
| Interior Rockingham | 33 | 0 | April 27, 2021 |
| Southern Carroll | 33 | 0 | April 27, 2021 |
| Sullivan | 32 | 0 | April 27, 2021 |
| Coastal Rockingham | 30 | 0 | April 27, 2021 |
| Southern Grafton | 30 | 0 | April 27, 2021 |
| Northern Carroll | 28 | 0 | April 27, 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 red flag warning?
A red flag warning means critical fire weather is happening or about to happen: strong wind, very low humidity and dry fuels together, so a fire that starts can spread fast. Each office sets the criteria with its land-management partners. 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.