Hamilton County weather alerts
There are no active weather alerts for Hamilton County, IA right now.
Since 2016 the National Weather Service has issued about 854 alerts that included Hamilton County, roughly 85 a year. The most common is the severe thunderstorm warning (149 from 2016 to 2025). The last tornado warning was issued on July 20, 2026. 56 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 Hamilton County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Webster County, Boone County, Hardin County, Wright County.
Hamilton County alert history
Alert events that included Hamilton County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 149 | 24 | August 9, 2026 |
| Winter Weather Advisory | 105 | 5 | March 16, 2026 |
| Dense Fog Advisory | 91 | 6 | September 17, 2026 |
| Wind Advisory | 89 | 3 | April 8, 2026 |
| Severe Thunderstorm Watch | 76 | 13 | August 18, 2026 |
| Cold Weather Advisory | 59 | 4 | March 16, 2026 |
| Flood Watch | 33 | 6 | September 30, 2026 |
| Heat Advisory | 30 | 3 | August 31, 2026 |
| Tornado Watch | 26 | 5 | July 20, 2026 |
| Winter Storm Warning | 25 | 1 | February 19, 2026 |
| Winter Storm Watch | 23 | 1 | March 15, 2026 |
| Freeze Warning | 19 | 3 | October 17, 2026 |
| Red Flag Warning | 17 | 3 | March 28, 2026 |
| Flood Warning | 15 | 0 | July 9, 2024 |
| Extreme Cold Warning | 13 | 1 | January 23, 2026 |
| Frost Advisory | 13 | 1 | May 2, 2026 |
| Blizzard Warning | 12 | 1 | March 15, 2026 |
| High Wind Warning | 11 | 3 | March 15, 2026 |
| Tornado Warning | 11 | 6 | July 20, 2026 |
| Extreme Heat Watch | 7 | 2 | July 27, 2026 |
| Extreme Heat Warning | 5 | 2 | July 26, 2026 |
| Flash Flood Warning | 5 | 1 | July 4, 2026 |
| Freeze Watch | 5 | 1 | October 17, 2026 |
| Extreme Cold Watch | 5 | 1 | January 23, 2026 |
| High Wind Watch | 4 | 2 | March 15, 2026 |
| Fire Weather Watch | 3 | 2 | March 28, 2026 |
| Snow Squall Warning | 2 | 0 | December 28, 2025 |
| Ice Storm Warning | 1 | 0 | January 15, 2017 |
Tornado history in Hamilton County
56 tornadoes have been recorded in Hamilton County since 1950, killing 1 people and injuring 13. That ranks 8 of 99 counties in Iowa. The most recent was on May 24, 2024 (rated EF1).
Strongest tornadoes in Hamilton County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 24, 1989 | F4 | Hamilton County | 66 mi | 150 yd | 0 | 0 |
| November 12, 2005 | F3 | Boone County | 17.6 mi | 150 yd | 1 | 3 |
| June 7, 1953 | F2 | Webster County | 49 mi | 200 yd | 0 | 0 |
| March 13, 1990 | F2 | Boone County | 22 mi | 50 yd | 0 | 0 |
| December 15, 2021 | EF2 | Boone County | 16.3 mi | 125 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 24, 2024 | EF1 | Hamilton County | 2.9 mi | 75 yd | 0 | 0 |
| April 7, 2024 | EF1 | Hamilton County | 0.7 mi | 70 yd | 0 | 0 |
| December 15, 2021 | EF0 | Hamilton County | 8.8 mi | 70 yd | 0 | 0 |
| December 15, 2021 | EF0 | Webster County | 7.6 mi | 80 yd | 0 | 0 |
| December 15, 2021 | EF2 | Webster County | 12.1 mi | 100 yd | 0 | 0 |
About Hamilton County
- Population: 14,856 (2024 estimate)
- State: Iowa
- NOAA Weather Radio SAME code: 019079 (how to use it)