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Tornado History
Slope Tornado History
This county-level tornado history page focuses on Slope, North Dakota. The records below identify 10 tornadoes from 1960 through 2010, including a highest listed rating of F1 (Moderate damage). NOAA damage estimates in this group total at least $90K, with 0 deaths and 0 injuries recorded across the listed events.
Key Tornado Statistics
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Check any addressKey Tornado Facts for Slope, North Dakota
Top local patterns from the historical tornado records in this group.
Average 0.2 tornadoes per year (0.0/yr in last decade)
July is the peak tornado month with 4 recorded events
Deadliest tornado: Unknown in Slope, North Dakota with 0 deaths
1983 was the most active year with 2 tornadoes
The 1990s had the most tornado activity (3 events)
Longest tornado: 7 miles in Slope, North Dakota
Widest tornado: 40.0 yards in Slope, North Dakota
Most tornadoes in one day: 2 on Jul 17, 1983
Monthly Distribution
Shows tornado frequency across months of the year, highlighting seasonal patterns and peak tornado periods.
Summary: In Slope, North Dakota, July is the most active month with 4 tornadoes.
Annual Tornado Trend
Shows year-by-year tornado counts, making active years and quiet stretches easier to spot.
Summary: 1983 was the most active year with 2 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 2010 with at least $30K 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 8, 1991 | F1 | Slope, North Dakota | 0.1 mi | 7 yd | 0 | 0 | $2K |
| September 9, 2010 | EF0 | Slope, North Dakota | 0.82 mi | 40 yd | 0 | 0 | $30K |
| June 8, 1991 | F0 | Slope, North Dakota | 0.1 mi | 10 yd | 0 | 0 | $25K |
| June 20, 1999 | F0 | Slope, North Dakota | 2 mi | 25 yd | 0 | 0 | $5K |
| July 17, 1983 | F0 | Slope, North Dakota | 0.3 mi | 10 yd | 0 | 0 | $30 |
| July 17, 1983 | F0 | Slope, North Dakota | 0.3 mi | 10 yd | 0 | 0 | $30 |
| July 3, 2001 | F0 | Slope, North Dakota | 7 mi | 40 yd | 0 | 0 | N/A |
| July 26, 2010 | EF0 | Slope, North Dakota | 5.34 mi | 30 yd | 0 | 0 | N/A |
| May 23, 1965 | Unknown | Slope, North Dakota | 0 mi | 33 yd | 0 | 0 | $25K |
| August 6, 1960 | Unknown | Slope, North Dakota | 0 mi | 33 yd | 0 | 0 | $2K |
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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.