Story County weather alerts
There are no active weather alerts for Story County, IA right now.
Since 2016 the National Weather Service has issued about 902 alerts that included Story County, roughly 90 a year. The most common is the severe thunderstorm warning (176 from 2016 to 2025). The last tornado warning was issued on August 13, 2026. 66 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 Story County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Marshall County, Boone County, Hamilton County, Hardin County.
Story County alert history
Alert events that included Story County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 176 | 41 | September 8, 2026 |
| Winter Weather Advisory | 103 | 4 | March 16, 2026 |
| Dense Fog Advisory | 96 | 5 | September 17, 2026 |
| Wind Advisory | 81 | 4 | April 8, 2026 |
| Severe Thunderstorm Watch | 74 | 11 | August 13, 2026 |
| Cold Weather Advisory | 52 | 3 | January 26, 2026 |
| Heat Advisory | 38 | 4 | August 31, 2026 |
| Flood Watch | 32 | 6 | September 30, 2026 |
| Tornado Watch | 30 | 5 | July 20, 2026 |
| Freeze Warning | 24 | 2 | October 17, 2026 |
| Flood Warning | 23 | 7 | October 2, 2026 |
| Winter Storm Watch | 23 | 1 | March 15, 2026 |
| Winter Storm Warning | 20 | 1 | February 19, 2026 |
| Tornado Warning | 18 | 6 | August 13, 2026 |
| Red Flag Warning | 16 | 3 | March 28, 2026 |
| Flash Flood Warning | 15 | 6 | July 21, 2026 |
| Frost Advisory | 10 | 1 | May 2, 2026 |
| Extreme Heat Watch | 9 | 2 | July 27, 2026 |
| High Wind Warning | 9 | 3 | March 15, 2026 |
| Extreme Cold Warning | 9 | 1 | January 23, 2026 |
| Snow Squall Warning | 9 | 0 | December 28, 2025 |
| Blizzard Warning | 8 | 1 | March 15, 2026 |
| Freeze Watch | 7 | 1 | October 17, 2026 |
| Extreme Heat Warning | 6 | 2 | July 26, 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 |
| Ice Storm Warning | 2 | 0 | February 22, 2023 |
Tornado history in Story County
66 tornadoes have been recorded in Story County since 1950, killing 1 people and injuring 47. That ranks 2 of 99 counties in Iowa. The most recent was on July 19, 2025 (rated unknown).
Strongest tornadoes in Story County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 13, 1976 | F5 | Boone County | 21.3 mi | 880 yd | 0 | 9 |
| May 24, 1989 | F4 | Hamilton County | 66 mi | 150 yd | 0 | 0 |
| May 20, 1953 | F3 | Story County | 116.1 mi | 400 yd | 1 | 0 |
| March 22, 1991 | F3 | Story County | 43 mi | 70 yd | 0 | 0 |
| March 13, 1990 | F3 | Story County | 9 mi | 100 yd | 0 | 1 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 19, 2025 | ? | Boone County | 4.5 mi | 40 yd | 0 | 0 |
| May 21, 2024 | EF2 | Polk County | 40.8 mi | 1,000 yd | 0 | 4 |
| April 23, 2022 | EF1 | Polk County | 9.1 mi | 80 yd | 0 | 0 |
| July 19, 2018 | EF0 | Story County | 2.5 mi | 40 yd | 0 | 0 |
| July 19, 2018 | EF0 | Story County | 2.8 mi | 60 yd | 0 | 0 |
About Story County
- Population: 102,498 (2024 estimate)
- State: Iowa
- NOAA Weather Radio SAME code: 019169 (how to use it)