Tornado History
Mercer Tornado History
This county-level tornado history page focuses on Mercer, North Dakota. The records below identify 22 tornadoes from 1956 through 2025, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $1.1M, with 0 deaths and 3 injuries recorded across the listed events.
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Key Tornado Statistics
Key Tornado Facts for Mercer, North Dakota
Top local patterns from the historical tornado records in this group.
Average 0.3 tornadoes per year (0.3/yr in last decade)
July is the peak tornado month with 9 recorded events
Deadliest tornado: F3 in Mercer, North Dakota with 0 deaths
1976 was the most active year with 3 tornadoes
The 1970s had the most tornado activity (5 events)
Longest tornado: 24.5 miles in Mercer, North Dakota
Widest tornado: 100.0 yards in Mercer, North Dakota
Most tornadoes in one day: 2 on Jul 8, 2011
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Mercer, North Dakota, July is the most active month with 9 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 1976 was the most active year with 3 recorded tornadoes.
Property Damage Trends
Visualizes reported property damage over time. Bars use a log-like scale so very large damage years do not flatten the rest of the chart.
Summary: The highest reported property damage year in this group is 1976 with at least $275K in NOAA-listed property damage.
Historical Track Sketch
This map covers the wider location—not your exact property.Measure the closest recorded track to a street address in or near Mercer, North Dakota.
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Notable Tornado Records
The table highlights the strongest and most damaging records in this page's local dataset. Damage totals are NOAA-reported minimum estimates where available.
| Date | Rating | Area | Length | Width | Deaths | Injuries | Min. property damage |
|---|---|---|---|---|---|---|---|
| June 18, 1956 | F3 | Mercer, North Dakota | 10.6 mi | 100 yd | 0 | 1 | $250K |
| May 24, 1975 | F2 | Mercer, North Dakota | 24.5 mi | 50 yd | 0 | 0 | $25K |
| July 19, 1976 | F1 | Mercer, North Dakota | 0.5 mi | 50 yd | 0 | 0 | $250K |
| June 13, 1999 | F1 | Mercer, North Dakota | 2 mi | 30 yd | 0 | 0 | $150K |
| August 21, 1962 | F1 | Mercer, North Dakota | 0 mi | 33 yd | 0 | 0 | $25K |
| August 12, 1969 | F1 | Mercer, North Dakota | 7.6 mi | 50 yd | 0 | 0 | $25K |
| July 12, 1976 | F1 | Mercer, North Dakota | 0 mi | 33 yd | 0 | 2 | $25K |
| July 4, 1988 | F0 | Mercer, North Dakota | 0.2 mi | 30 yd | 0 | 0 | $250K |
| August 1, 2010 | EF0 | Mercer, North Dakota | 1.65 mi | 40 yd | 0 | 0 | $50K |
| July 10, 1997 | F0 | Mercer, North Dakota | 0.2 mi | 10 yd | 0 | 0 | $35K |
| June 11, 1976 | F0 | Mercer, North Dakota | 0 mi | 33 yd | 0 | 0 | N/A |
| May 13, 1977 | F0 | Mercer, North Dakota | 0 mi | 33 yd | 0 | 0 | N/A |
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Source And Limits
Data sourced from NOAA Storm Prediction Center and the NCEI Storm Events Database. TornadoTrace summarizes reported weather events for screening and research; it is not a damage assessment, inspection, or insurance determination. Coordinates and records can be approximate, incomplete, revised, or missing. No warranty of completeness or accuracy.