Mercer County weather alerts
There are no active weather alerts for Mercer County, MO right now.
Since 2016 the National Weather Service has issued about 753 alerts that included Mercer County, roughly 75 a year. The most common is the severe thunderstorm warning (128 from 2016 to 2025). The last tornado warning was issued on June 10, 2026. 15 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 Mercer County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Wayne County, Sullivan County, Decatur County, Putnam County.
Mercer County alert history
Alert events that included Mercer County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 128 | 53 | September 20, 2026 |
| Dense Fog Advisory | 81 | 10 | September 11, 2026 |
| Severe Thunderstorm Watch | 74 | 6 | September 20, 2026 |
| Winter Weather Advisory | 72 | 4 | April 7, 2026 |
| Wind Advisory | 57 | 4 | June 17, 2026 |
| Heat Advisory | 37 | 6 | August 31, 2026 |
| Flood Watch | 30 | 10 | September 30, 2026 |
| Tornado Watch | 30 | 10 | June 11, 2026 |
| Freeze Warning | 27 | 3 | November 7, 2026 |
| Cold Weather Advisory | 27 | 2 | January 26, 2026 |
| Flood Warning | 25 | 5 | June 11, 2026 |
| Red Flag Warning | 19 | 4 | March 28, 2026 |
| Flash Flood Warning | 18 | 5 | June 11, 2026 |
| Winter Storm Watch | 18 | 0 | November 29, 2025 |
| Frost Advisory | 17 | 2 | May 2, 2026 |
| Tornado Warning | 16 | 2 | June 10, 2026 |
| Winter Storm Warning | 16 | 0 | November 29, 2025 |
| Flood Advisory | 13 | 7 | September 16, 2026 |
| Freeze Watch | 8 | 1 | October 17, 2026 |
| Fire Weather Watch | 7 | 2 | March 28, 2026 |
| High Wind Warning | 7 | 1 | March 15, 2026 |
| Extreme Heat Warning | 6 | 3 | September 3, 2026 |
| Extreme Cold Warning | 6 | 1 | January 23, 2026 |
| Extreme Heat Watch | 5 | 2 | July 25, 2026 |
| Extreme Cold Watch | 4 | 1 | January 23, 2026 |
| Ice Storm Warning | 2 | 0 | February 6, 2019 |
| High Wind Watch | 2 | 1 | March 15, 2026 |
| Blizzard Warning | 1 | 0 | November 25, 2018 |
| Snow Squall Warning | 0 | 1 | January 16, 2026 |
Tornado history in Mercer County
15 tornadoes have been recorded in Mercer County since 1950, injuring 1 people. That ranks 91 of 115 counties in Missouri. The most recent was on April 27, 2024 (rated EF0).
Strongest tornadoes in Mercer County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 21, 1973 | F4 | Mercer County | 14.6 mi | 440 yd | 0 | 1 |
| April 16, 1960 | F2 | Mercer County | 29.6 mi | 100 yd | 0 | 0 |
| September 26, 1959 | F2 | Mercer County | 5.4 mi | 50 yd | 0 | 0 |
| March 6, 2017 | EF1 | Mercer County | 10.3 mi | 100 yd | 0 | 0 |
| June 29, 2014 | EF1 | Mercer County | 6.3 mi | 300 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 27, 2024 | EF0 | Grundy County | 4 mi | 75 yd | 0 | 0 |
| March 6, 2017 | EF1 | Mercer County | 10.3 mi | 100 yd | 0 | 0 |
| November 11, 2015 | EF0 | Mercer County | 0.3 mi | 40 yd | 0 | 0 |
| June 29, 2014 | EF1 | Mercer County | 6.3 mi | 300 yd | 0 | 0 |
| July 19, 2010 | EF0 | Mercer County | 0.1 mi | 25 yd | 0 | 0 |
About Mercer County
- Population: 3,452 (2024 estimate)
- State: Missouri
- NOAA Weather Radio SAME code: 029129 (how to use it)