Belknap County weather alerts
There are no active weather alerts for Belknap County, NH right now.
Since 2016 the National Weather Service has issued about 783 alerts that included Belknap County, roughly 78 a year. The most common is the winter weather advisory (124 from 2016 to 2025). The last tornado warning was issued on August 22, 2020. 12 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Belknap County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Carroll County, Strafford County, Merrimack County, Grafton County.
Belknap County alert history
Alert events that included Belknap County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 124 | 8 | March 22, 2026 |
| Severe Thunderstorm Warning | 107 | 5 | July 16, 2026 |
| Wind Advisory | 60 | 1 | March 17, 2026 |
| Winter Storm Watch | 54 | 1 | January 25, 2026 |
| Flood Watch | 49 | 2 | July 29, 2026 |
| Winter Storm Warning | 48 | 3 | February 23, 2026 |
| Flood Advisory | 45 | 1 | June 12, 2026 |
| Dense Fog Advisory | 45 | 0 | April 1, 2025 |
| Severe Thunderstorm Watch | 45 | 2 | July 15, 2026 |
| Flood Warning | 40 | 2 | May 15, 2026 |
| Heat Advisory | 35 | 3 | July 14, 2026 |
| Flash Flood Warning | 23 | 0 | July 29, 2023 |
| Snow Squall Warning | 21 | 0 | December 4, 2025 |
| Frost Advisory | 20 | 2 | May 13, 2026 |
| Fire Weather Watch | 11 | 0 | April 27, 2021 |
| Red Flag Warning | 11 | 0 | April 27, 2021 |
| Cold Weather Advisory | 10 | 4 | February 9, 2026 |
| Freeze Warning | 7 | 0 | October 10, 2025 |
| Extreme Cold Watch | 4 | 0 | February 3, 2023 |
| Extreme Cold Warning | 4 | 1 | January 24, 2026 |
| Tornado Watch | 4 | 1 | June 18, 2026 |
| High Wind Warning | 3 | 0 | February 25, 2019 |
| High Wind Watch | 3 | 0 | December 23, 2022 |
| Extreme Heat Warning | 3 | 1 | July 1, 2026 |
| Freeze Watch | 2 | 0 | October 10, 2025 |
| Extreme Heat Watch | 2 | 1 | July 1, 2026 |
| Tornado Warning | 1 | 0 | August 22, 2020 |
| Tropical Storm Watch | 1 | 0 | August 3, 2020 |
| Tropical Storm Warning | 1 | 0 | August 3, 2020 |
Tornado history in Belknap County
12 tornadoes have been recorded in Belknap County since 1950, killing 1 people and injuring 9. That ranks 4 of 10 counties in New Hampshire. The most recent was on August 22, 2020 (rated EF0).
Strongest tornadoes in Belknap County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 24, 2008 | EF2 | Rockingham County | 50.5 mi | 880 yd | 1 | 2 |
| July 6, 1999 | F2 | Merrimack County | 7.5 mi | 0 yd | 0 | 0 |
| July 3, 1972 | F2 | Belknap County | 1 mi | 40 yd | 0 | 7 |
| May 31, 1972 | F1 | Belknap County | 1 mi | 70 yd | 0 | 0 |
| June 24, 1960 | F1 | Belknap County | 0.5 mi | 50 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 22, 2020 | EF0 | Belknap County | 1.5 mi | 50 yd | 0 | 0 |
| July 24, 2014 | EF0 | Belknap County | 0 mi | 10 yd | 0 | 0 |
| July 4, 2014 | EF0 | Belknap County | 0.4 mi | 10 yd | 0 | 0 |
| June 25, 2012 | EF0 | Belknap County | 0.1 mi | 10 yd | 0 | 0 |
| July 24, 2008 | EF2 | Rockingham County | 50.5 mi | 880 yd | 1 | 2 |
About Belknap County
- Population: 65,257 (2024 estimate)
- State: New Hampshire
- NOAA Weather Radio SAME code: 033001 (how to use it)