Johnson County weather alerts
There are no active weather alerts for Johnson County, MO right now.
Since 2016 the National Weather Service has issued about 1,240 alerts that included Johnson County, roughly 124 a year. The most common is the severe thunderstorm warning (290 from 2016 to 2025). The last tornado warning was issued on June 17, 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 Johnson County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Pettis County, Lafayette County, Jackson County, Cass County.
Johnson County alert history
Alert events that included Johnson County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 290 | 51 | September 9, 2026 |
| Flood Warning | 220 | 24 | August 6, 2026 |
| Severe Thunderstorm Watch | 93 | 15 | October 13, 2026 |
| Dense Fog Advisory | 87 | 6 | September 11, 2026 |
| Winter Weather Advisory | 67 | 1 | March 15, 2026 |
| Heat Advisory | 65 | 5 | September 8, 2026 |
| Wind Advisory | 62 | 3 | June 17, 2026 |
| Flood Watch | 45 | 13 | October 14, 2026 |
| Flash Flood Warning | 38 | 8 | July 16, 2026 |
| Flood Advisory | 36 | 12 | August 6, 2026 |
| Red Flag Warning | 36 | 2 | February 27, 2026 |
| Freeze Warning | 33 | 1 | March 28, 2026 |
| Tornado Watch | 29 | 8 | June 13, 2026 |
| Frost Advisory | 23 | 4 | November 8, 2026 |
| Tornado Warning | 21 | 4 | June 17, 2026 |
| Cold Weather Advisory | 14 | 2 | January 26, 2026 |
| Winter Storm Watch | 14 | 1 | January 24, 2026 |
| Fire Weather Watch | 13 | 0 | March 17, 2025 |
| Extreme Heat Warning | 11 | 5 | September 6, 2026 |
| Winter Storm Warning | 11 | 1 | January 24, 2026 |
| Freeze Watch | 9 | 0 | November 2, 2025 |
| High Wind Warning | 8 | 0 | March 14, 2025 |
| Extreme Heat Watch | 4 | 3 | August 9, 2026 |
| Extreme Cold Warning | 4 | 0 | January 13, 2024 |
| Extreme Cold Watch | 3 | 0 | February 20, 2025 |
| Ice Storm Warning | 2 | 0 | February 6, 2019 |
| Blizzard Warning | 1 | 0 | November 25, 2018 |
| High Wind Watch | 1 | 0 | March 14, 2025 |
| Snow Squall Warning | 0 | 2 | March 15, 2026 |
Tornado history in Johnson County
33 tornadoes have been recorded in Johnson County since 1950, killing 1 people and injuring 14. That ranks 31 of 115 counties in Missouri. The most recent was on March 6, 2017 (rated EF0).
Strongest tornadoes in Johnson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 12, 1964 | F2 | Johnson County | 10.7 mi | 100 yd | 1 | 3 |
| May 4, 2003 | F2 | Cass County | 22 mi | 100 yd | 0 | 0 |
| March 12, 2006 | F2 | Johnson County | 12.8 mi | 200 yd | 0 | 4 |
| May 15, 1968 | F2 | Johnson County | 12.3 mi | 50 yd | 0 | 0 |
| May 15, 1968 | F2 | Johnson County | 5.2 mi | 200 yd | 0 | 2 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 6, 2017 | EF0 | Johnson County | 3.9 mi | 25 yd | 0 | 0 |
| May 26, 2016 | EF0 | Johnson County | 1.4 mi | 25 yd | 0 | 0 |
| May 20, 2010 | EF0 | Johnson County | 0.2 mi | 25 yd | 0 | 0 |
| October 17, 2007 | EF0 | Johnson County | 0.1 mi | 25 yd | 0 | 0 |
| February 28, 2007 | EF1 | Cass County | 6.2 mi | 50 yd | 0 | 0 |
About Johnson County
- Population: 55,880 (2024 estimate)
- State: Missouri
- NOAA Weather Radio SAME code: 029101 (how to use it)