Cass County weather alerts
There are no active weather alerts for Cass County, IA right now.
Since 2016 the National Weather Service has issued about 828 alerts that included Cass County, roughly 83 a year. The most common is the severe thunderstorm warning (156 from 2016 to 2025). The last tornado warning was issued on June 11, 2026. 43 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 Cass County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Shelby County, Adams County, Adair County, Montgomery County.
Cass County alert history
Alert events that included Cass County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 156 | 20 | September 15, 2026 |
| Severe Thunderstorm Watch | 89 | 10 | September 6, 2026 |
| Dense Fog Advisory | 86 | 6 | September 17, 2026 |
| Winter Weather Advisory | 81 | 3 | April 7, 2026 |
| Wind Advisory | 73 | 2 | March 12, 2026 |
| Heat Advisory | 46 | 4 | August 31, 2026 |
| Cold Weather Advisory | 39 | 3 | March 16, 2026 |
| Flood Watch | 34 | 7 | September 30, 2026 |
| Tornado Watch | 29 | 6 | September 14, 2026 |
| Freeze Warning | 25 | 1 | October 17, 2026 |
| Red Flag Warning | 24 | 5 | March 28, 2026 |
| Winter Storm Watch | 20 | 1 | March 15, 2026 |
| Winter Storm Warning | 18 | 1 | February 19, 2026 |
| Tornado Warning | 18 | 4 | June 11, 2026 |
| Frost Advisory | 15 | 1 | May 2, 2026 |
| Flash Flood Warning | 11 | 4 | September 15, 2026 |
| Fire Weather Watch | 10 | 2 | March 28, 2026 |
| Extreme Cold Warning | 9 | 1 | January 23, 2026 |
| Extreme Heat Watch | 8 | 2 | July 27, 2026 |
| Extreme Heat Warning | 8 | 2 | July 26, 2026 |
| Freeze Watch | 7 | 1 | October 17, 2026 |
| High Wind Warning | 6 | 2 | March 15, 2026 |
| Blizzard Warning | 4 | 1 | March 15, 2026 |
| Extreme Cold Watch | 4 | 1 | January 23, 2026 |
| Flood Warning | 3 | 1 | October 1, 2026 |
| High Wind Watch | 3 | 2 | March 15, 2026 |
| Ice Storm Warning | 1 | 0 | January 15, 2017 |
| Snow Squall Warning | 1 | 0 | January 2, 2025 |
Tornado history in Cass County
43 tornadoes have been recorded in Cass County since 1950, injuring 13 people. That ranks 27 of 99 counties in Iowa. The most recent was on June 28, 2024 (rated unknown).
Strongest tornadoes in Cass County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 8, 1999 | F4 | Taylor County | 49 mi | 1,000 yd | 0 | 3 |
| May 13, 1974 | F3 | Montgomery County | 10.9 mi | 20 yd | 0 | 0 |
| April 20, 1964 | F3 | Cass County | 6.1 mi | 350 yd | 0 | 1 |
| December 15, 2021 | EF2 | Cass County | 27.1 mi | 100 yd | 0 | 0 |
| June 7, 1984 | F2 | Cass County | 23 mi | 150 yd | 0 | 8 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 28, 2024 | ? | Cass County | 0.3 mi | 20 yd | 0 | 0 |
| June 28, 2024 | ? | Cass County | 0.4 mi | 30 yd | 0 | 0 |
| June 28, 2024 | EF0 | Cass County | 2.4 mi | 50 yd | 0 | 0 |
| June 28, 2024 | ? | Cass County | 0.9 mi | 40 yd | 0 | 0 |
| April 16, 2024 | EF1 | Cass County | 0.9 mi | 30 yd | 0 | 0 |
About Cass County
- Population: 13,024 (2024 estimate)
- State: Iowa
- NOAA Weather Radio SAME code: 019029 (how to use it)