Sullivan County weather alerts
There are no active weather alerts for Sullivan County, NH right now.
Since 2016 the National Weather Service has issued about 711 alerts that included Sullivan County, roughly 71 a year. The most common is the winter weather advisory (109 from 2016 to 2025). The last tornado warning was issued on July 21, 2022. 6 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 Sullivan County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Windham County, Windsor County, Hillsborough County, Cheshire County.
Sullivan County alert history
Alert events that included Sullivan County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 109 | 8 | March 22, 2026 |
| Severe Thunderstorm Warning | 101 | 7 | July 15, 2026 |
| Winter Storm Watch | 53 | 1 | January 25, 2026 |
| Flood Advisory | 52 | 1 | June 12, 2026 |
| Flood Watch | 50 | 2 | July 29, 2026 |
| Wind Advisory | 49 | 1 | March 17, 2026 |
| Severe Thunderstorm Watch | 45 | 2 | July 15, 2026 |
| Winter Storm Warning | 45 | 2 | February 20, 2026 |
| Dense Fog Advisory | 29 | 0 | December 29, 2024 |
| Heat Advisory | 28 | 3 | July 14, 2026 |
| Flood Warning | 23 | 0 | May 10, 2025 |
| Frost Advisory | 23 | 1 | May 22, 2026 |
| Flash Flood Warning | 21 | 0 | May 21, 2024 |
| Red Flag Warning | 12 | 0 | April 27, 2021 |
| Fire Weather Watch | 11 | 0 | April 27, 2021 |
| Cold Weather Advisory | 11 | 4 | February 9, 2026 |
| Freeze Warning | 9 | 1 | May 12, 2026 |
| Snow Squall Warning | 9 | 0 | January 28, 2025 |
| Extreme Cold Watch | 5 | 1 | February 7, 2026 |
| Extreme Cold Warning | 5 | 1 | February 7, 2026 |
| High Wind Warning | 4 | 0 | February 17, 2025 |
| Tornado Watch | 4 | 1 | June 18, 2026 |
| Tornado Warning | 4 | 0 | July 21, 2022 |
| High Wind Watch | 3 | 0 | December 23, 2022 |
| Freeze Watch | 2 | 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 | 1 | 1 | July 1, 2026 |
Tornado history in Sullivan County
6 tornadoes have been recorded in Sullivan County since 1950. That ranks 9 of 10 counties in New Hampshire. The most recent was on May 16, 2022 (rated EF1).
Strongest tornadoes in Sullivan County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 4, 2018 | EF1 | Cheshire County | 37.6 mi | 300 yd | 0 | 0 |
| August 13, 1999 | F1 | Sullivan County | 8 mi | 250 yd | 0 | 0 |
| May 16, 2022 | EF1 | Sullivan County | 4.8 mi | 330 yd | 0 | 0 |
| July 18, 1963 | F1 | Sullivan County | 1 mi | 200 yd | 0 | 0 |
| October 24, 1955 | F0 | Sullivan County | 14.6 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 16, 2022 | EF1 | Sullivan County | 4.8 mi | 330 yd | 0 | 0 |
| May 4, 2018 | EF1 | Cheshire County | 37.6 mi | 300 yd | 0 | 0 |
| August 13, 1999 | F1 | Sullivan County | 8 mi | 250 yd | 0 | 0 |
| July 18, 1963 | F1 | Sullivan County | 1 mi | 200 yd | 0 | 0 |
| July 9, 1962 | F0 | Sullivan County | 1 mi | 40 yd | 0 | 0 |
About Sullivan County
- Population: 44,012 (2024 estimate)
- State: New Hampshire
- NOAA Weather Radio SAME code: 033019 (how to use it)