Mercer County weather alerts
There are no active weather alerts for Mercer County, ND right now.
Since 2016 the National Weather Service has issued about 963 alerts that included Mercer County, roughly 96 a year. The most common is the severe thunderstorm warning (161 from 2016 to 2025). The last tornado warning was issued on July 8, 2020. 22 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 Oliver County, Morton County, McLean County, Stark 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 | 161 | 33 | September 29, 2026 |
| Wind Advisory | 131 | 14 | October 24, 2026 |
| Dense Fog Advisory | 103 | 17 | November 11, 2026 |
| Winter Weather Advisory | 98 | 8 | April 1, 2026 |
| Cold Weather Advisory | 88 | 3 | January 25, 2026 |
| Severe Thunderstorm Watch | 73 | 7 | August 30, 2026 |
| Red Flag Warning | 43 | 8 | September 10, 2026 |
| Freeze Warning | 32 | 4 | October 16, 2026 |
| Frost Advisory | 30 | 2 | May 20, 2026 |
| Fire Weather Watch | 28 | 3 | May 16, 2026 |
| High Wind Warning | 21 | 3 | September 14, 2026 |
| Extreme Cold Warning | 21 | 1 | January 22, 2026 |
| Winter Storm Watch | 21 | 1 | April 3, 2026 |
| High Wind Watch | 16 | 2 | March 12, 2026 |
| Winter Storm Warning | 16 | 1 | April 3, 2026 |
| Heat Advisory | 15 | 4 | July 29, 2026 |
| Tornado Watch | 11 | 3 | June 29, 2026 |
| Flood Warning | 11 | 0 | September 16, 2024 |
| Tornado Warning | 11 | 0 | July 8, 2020 |
| Freeze Watch | 10 | 0 | September 6, 2025 |
| Blizzard Warning | 8 | 0 | April 4, 2023 |
| Flood Watch | 5 | 0 | August 14, 2024 |
| Flood Advisory | 4 | 0 | August 2, 2023 |
| Extreme Cold Watch | 3 | 1 | January 22, 2026 |
| Flash Flood Warning | 2 | 0 | July 8, 2019 |
| Extreme Heat Warning | 1 | 1 | July 11, 2026 |
| Dust Storm Warning | 0 | 1 | May 14, 2026 |
| Extreme Heat Watch | 0 | 1 | July 11, 2026 |
Tornado history in Mercer County
22 tornadoes have been recorded in Mercer County since 1950, injuring 8 people. That ranks 38 of 53 counties in North Dakota. The most recent was on August 30, 2025 (rated unknown).
Strongest tornadoes in Mercer County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 18, 1956 | F3 | Mercer County | 10.6 mi | 100 yd | 0 | 1 |
| May 24, 1975 | F2 | Mercer County | 33.7 mi | 50 yd | 0 | 5 |
| August 12, 1969 | F1 | Mercer County | 7.6 mi | 50 yd | 0 | 0 |
| June 13, 1999 | F1 | Mercer County | 2 mi | 30 yd | 0 | 0 |
| October 2, 1967 | F1 | Mercer County | 0.6 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 30, 2025 | ? | Mercer County | 0.5 mi | 50 yd | 0 | 0 |
| July 8, 2019 | EF0 | Mercer County | 0.6 mi | 50 yd | 0 | 0 |
| June 1, 2018 | EF0 | Mercer County | 1.4 mi | 75 yd | 0 | 0 |
| July 8, 2011 | EF0 | Mercer County | 3.2 mi | 30 yd | 0 | 0 |
| July 8, 2011 | EF0 | Mercer County | 3.1 mi | 40 yd | 0 | 0 |
About Mercer County
- Population: 8,348 (2024 estimate)
- State: North Dakota
- NOAA Weather Radio SAME code: 038057 (how to use it)