Marshall County weather alerts
There are no active weather alerts for Marshall County, IA right now.
Since 2016 the National Weather Service has issued about 911 alerts that included Marshall County, roughly 91 a year. The most common is the severe thunderstorm warning (187 from 2016 to 2025). The last tornado warning was issued on August 13, 2026. 39 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 Marshall County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Hardin County, Grundy County, Jasper County, Story County.
Marshall County alert history
Alert events that included Marshall County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 187 | 39 | September 8, 2026 |
| Winter Weather Advisory | 103 | 4 | March 16, 2026 |
| Dense Fog Advisory | 98 | 7 | September 17, 2026 |
| Wind Advisory | 79 | 4 | April 8, 2026 |
| Severe Thunderstorm Watch | 78 | 9 | August 13, 2026 |
| Cold Weather Advisory | 53 | 3 | January 26, 2026 |
| Heat Advisory | 33 | 2 | August 31, 2026 |
| Tornado Watch | 31 | 8 | July 20, 2026 |
| Flood Watch | 28 | 6 | September 30, 2026 |
| Winter Storm Watch | 26 | 1 | March 15, 2026 |
| Freeze Warning | 25 | 2 | October 17, 2026 |
| Tornado Warning | 23 | 5 | August 13, 2026 |
| Winter Storm Warning | 22 | 1 | February 19, 2026 |
| Frost Advisory | 16 | 1 | May 2, 2026 |
| Flood Warning | 14 | 2 | October 3, 2026 |
| Red Flag Warning | 14 | 2 | March 28, 2026 |
| High Wind Warning | 11 | 3 | March 15, 2026 |
| Extreme Heat Watch | 9 | 2 | July 27, 2026 |
| Extreme Cold Warning | 9 | 1 | January 23, 2026 |
| Flash Flood Warning | 9 | 4 | July 21, 2026 |
| Freeze Watch | 8 | 1 | October 17, 2026 |
| Snow Squall Warning | 8 | 0 | December 28, 2025 |
| Extreme Heat Warning | 6 | 2 | July 26, 2026 |
| Blizzard Warning | 5 | 1 | March 15, 2026 |
| Extreme Cold Watch | 5 | 1 | January 23, 2026 |
| High Wind Watch | 4 | 2 | March 15, 2026 |
| Fire Weather Watch | 4 | 2 | March 28, 2026 |
| Ice Storm Warning | 3 | 0 | December 14, 2024 |
Tornado history in Marshall County
39 tornadoes have been recorded in Marshall County since 1950, killing 7 people and injuring 100. That ranks 37 of 99 counties in Iowa. The most recent was on August 10, 2020 (rated EF1).
Strongest tornadoes in Marshall County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 24, 1989 | F4 | Hamilton County | 66 mi | 150 yd | 0 | 0 |
| September 16, 1978 | F3 | Marshall County | 31.8 mi | 200 yd | 6 | 45 |
| April 23, 1961 | F3 | Marshall County | 87.7 mi | 800 yd | 1 | 12 |
| July 19, 2018 | EF3 | Marshall County | 8.4 mi | 1,200 yd | 0 | 22 |
| June 1, 1951 | F3 | Marshall County | 1.5 mi | 880 yd | 0 | 7 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 10, 2020 | EF1 | Marshall County | 2.9 mi | 100 yd | 0 | 0 |
| August 10, 2020 | ? | Marshall County | 0.4 mi | 50 yd | 0 | 0 |
| August 10, 2020 | ? | Marshall County | 1 mi | 50 yd | 0 | 0 |
| March 28, 2020 | EF0 | Marshall County | 1.3 mi | 75 yd | 0 | 0 |
| July 19, 2018 | EF3 | Marshall County | 8.4 mi | 1,200 yd | 0 | 22 |
About Marshall County
- Population: 40,392 (2024 estimate)
- State: Iowa
- NOAA Weather Radio SAME code: 019127 (how to use it)