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Tornado History
Mercer Tornado History
This county-level tornado history page focuses on Mercer, North Dakota. The records below identify 20 tornadoes from 1956 through 2025, including a highest listed rating of F3 (Severe damage). NOAA damage estimates in this group total at least $940K, with 0 deaths and 3 injuries recorded across the listed events.
Key Tornado Statistics
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Check any addressKey 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
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 |
| 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 |
| June 11, 1980 | F0 | Mercer, North Dakota | 0 mi | 33 yd | 0 | 0 | N/A |
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Source And Limits
Data source: NOAA/NCEI. TornadoTrace summarizes historical records for screening and research. Coordinates, damage estimates, narratives, and event details can be approximate, incomplete, revised, or missing. Do not use this page as legal, insurance, engineering, real estate, emergency management, or safety advice.