Harrison County weather alerts
There are no active weather alerts for Harrison County, IA right now.
Since 2016 the National Weather Service has issued about 1,063 alerts that included Harrison County, roughly 106 a year. The most common is the severe thunderstorm warning (278 from 2016 to 2025). The last tornado warning was issued on July 9, 2026. 33 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 Harrison County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Shelby County, Crawford County, Pottawattamie County, Washington County.
Harrison County alert history
Alert events that included Harrison County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 278 | 40 | September 15, 2026 |
| Dense Fog Advisory | 92 | 7 | September 17, 2026 |
| Winter Weather Advisory | 92 | 3 | April 7, 2026 |
| Wind Advisory | 83 | 3 | March 12, 2026 |
| Severe Thunderstorm Watch | 81 | 11 | August 13, 2026 |
| Heat Advisory | 39 | 6 | September 2, 2026 |
| Cold Weather Advisory | 39 | 3 | March 16, 2026 |
| Tornado Warning | 35 | 4 | July 9, 2026 |
| Red Flag Warning | 34 | 5 | March 28, 2026 |
| Flood Advisory | 33 | 2 | September 9, 2026 |
| Flood Watch | 27 | 4 | September 30, 2026 |
| Flash Flood Warning | 22 | 3 | October 1, 2026 |
| Freeze Warning | 22 | 1 | October 17, 2026 |
| Tornado Watch | 22 | 3 | September 14, 2026 |
| Winter Storm Watch | 20 | 1 | March 15, 2026 |
| Fire Weather Watch | 20 | 2 | March 28, 2026 |
| Flood Warning | 19 | 2 | October 1, 2026 |
| Winter Storm Warning | 16 | 1 | February 19, 2026 |
| Frost Advisory | 14 | 2 | May 2, 2026 |
| Extreme Heat Watch | 13 | 2 | July 27, 2026 |
| Extreme Heat Warning | 12 | 3 | July 27, 2026 |
| High Wind Warning | 12 | 3 | March 15, 2026 |
| Extreme Cold Warning | 9 | 1 | January 23, 2026 |
| Freeze Watch | 8 | 1 | October 17, 2026 |
| Extreme Cold Watch | 6 | 0 | February 19, 2025 |
| Snow Squall Warning | 5 | 1 | January 16, 2026 |
| Blizzard Warning | 4 | 0 | March 19, 2025 |
| High Wind Watch | 4 | 1 | March 15, 2026 |
| Ice Storm Warning | 2 | 0 | January 2, 2023 |
Tornado history in Harrison County
33 tornadoes have been recorded in Harrison County since 1950, killing 7 people and injuring 72. That ranks 51 of 99 counties in Iowa. The most recent was on May 24, 2024 (rated EF1).
Strongest tornadoes in Harrison County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 11, 2008 | EF3 | Harrison County | 13 mi | 440 yd | 4 | 48 |
| May 16, 1999 | F3 | Harrison County | 7.5 mi | 440 yd | 2 | 16 |
| April 26, 2024 | EF3 | Pottawattamie County | 40.3 mi | 1,900 yd | 1 | 3 |
| June 16, 1992 | F3 | Harrison County | 26 mi | 200 yd | 0 | 3 |
| April 26, 2024 | EF3 | Pottawattamie County | 19.1 mi | 550 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 24, 2024 | EF1 | Harrison County | 0.7 mi | 150 yd | 0 | 0 |
| April 26, 2024 | EF1 | Harrison County | 1.8 mi | 30 yd | 0 | 0 |
| April 26, 2024 | EF3 | Pottawattamie County | 40.3 mi | 1,900 yd | 1 | 3 |
| April 26, 2024 | EF0 | Harrison County | 2.6 mi | 200 yd | 0 | 0 |
| April 26, 2024 | EF3 | Pottawattamie County | 19.1 mi | 550 yd | 0 | 0 |
About Harrison County
- Population: 14,626 (2024 estimate)
- State: Iowa
- NOAA Weather Radio SAME code: 019085 (how to use it)