Grafton County weather alerts
There are no active weather alerts for Grafton County, NH right now.
Since 2016 the National Weather Service has issued about 1,004 alerts that included Grafton County, roughly 100 a year. The most common is the winter weather advisory (158 from 2016 to 2025). The last tornado warning was issued on July 11, 2024. 13 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 Grafton County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Coos County, Windsor County, Belknap County, Carroll County.
Grafton County alert history
Alert events that included Grafton County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 158 | 13 | April 5, 2026 |
| Severe Thunderstorm Warning | 145 | 15 | August 3, 2026 |
| Flood Warning | 92 | 4 | June 19, 2026 |
| Flood Advisory | 87 | 4 | June 15, 2026 |
| Flood Watch | 64 | 4 | July 29, 2026 |
| Wind Advisory | 55 | 1 | March 17, 2026 |
| Winter Storm Watch | 53 | 1 | January 25, 2026 |
| Winter Storm Warning | 51 | 2 | February 20, 2026 |
| Flash Flood Warning | 47 | 1 | June 11, 2026 |
| Frost Advisory | 41 | 6 | September 24, 2026 |
| Severe Thunderstorm Watch | 37 | 2 | July 15, 2026 |
| Dense Fog Advisory | 28 | 0 | December 29, 2024 |
| Cold Weather Advisory | 26 | 6 | February 9, 2026 |
| Heat Advisory | 25 | 4 | July 14, 2026 |
| Snow Squall Warning | 19 | 1 | January 22, 2026 |
| Freeze Warning | 17 | 2 | May 22, 2026 |
| Extreme Cold Warning | 10 | 1 | January 24, 2026 |
| Fire Weather Watch | 9 | 0 | April 27, 2021 |
| Red Flag Warning | 9 | 0 | April 27, 2021 |
| Tornado Warning | 8 | 0 | July 11, 2024 |
| Extreme Cold Watch | 6 | 2 | February 7, 2026 |
| High Wind Warning | 4 | 0 | January 10, 2024 |
| Tornado Watch | 4 | 1 | June 18, 2026 |
| High Wind Watch | 3 | 0 | January 10, 2024 |
| Freeze Watch | 3 | 0 | October 10, 2025 |
| Tropical Storm Watch | 1 | 0 | August 3, 2020 |
| Tropical Storm Warning | 1 | 0 | August 3, 2020 |
| Extreme Heat Watch | 1 | 1 | July 1, 2026 |
| Extreme Heat Warning | 0 | 1 | July 1, 2026 |
Tornado history in Grafton County
13 tornadoes have been recorded in Grafton County since 1950. That ranks 3 of 10 counties in New Hampshire. The most recent was on July 16, 2024 (rated EF1).
Strongest tornadoes in Grafton County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 25, 1969 | F3 | Grafton County | 5.7 mi | 17 yd | 0 | 0 |
| August 11, 1966 | F2 | Grafton County | 9 mi | 100 yd | 0 | 0 |
| May 11, 1973 | F2 | Grafton County | 0.5 mi | 150 yd | 0 | 0 |
| August 13, 1999 | F1 | Sullivan County | 8 mi | 250 yd | 0 | 0 |
| July 21, 1972 | F1 | Grafton County | 7 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 16, 2024 | EF1 | Grafton County | 1.8 mi | 250 yd | 0 | 0 |
| June 18, 2018 | EF0 | Grafton County | 0.2 mi | 20 yd | 0 | 0 |
| June 18, 2018 | EF0 | Grafton County | 9.5 mi | 25 yd | 0 | 0 |
| July 17, 2012 | EF0 | Grafton County | 0.5 mi | 30 yd | 0 | 0 |
| August 21, 2011 | EF1 | Grafton County | 2.7 mi | 350 yd | 0 | 0 |
About Grafton County
- Population: 93,045 (2024 estimate)
- State: New Hampshire
- NOAA Weather Radio SAME code: 033009 (how to use it)