Strongest Tornadoes Recorded in North Dakota
The highest tornado rating, longest recorded path, casualties, and rating caveats in North Dakota’s SPC historical archive.
The highest rating in North Dakota’s 1950–2024 archive is F/EF5. The strongest entry shown here occurred on June 20, 1957 and had a recorded path length of 52.4 miles.
The highest rating in the archive
The strongest rating represented in North Dakota is F/EF5. When several records share that rating, this page highlights the one with the longest recorded path: 52.4 miles on June 20, 1957.
This is a database summary, not a definitive ranking of every historical tornado. Early events may have incomplete paths or retrospective ratings.
Rating is based on damage
Survey teams assign EF ratings by examining damage indicators and degrees of damage. The scale estimates a wind range from the damage that occurred; it does not measure every tornado’s maximum wind directly.
A violent tornado crossing open land may leave few indicators, while a lower-rated tornado can still be deadly when exposure and shelter are poor.
Impact across the full record
The state archive totals 366 injuries and 28 fatalities. Those human impacts cannot be compared by rating alone because warning access, time of day, construction, population, and storm speed matter.
Use historic events to improve present-day plans: reliable alerts, rapid shelter, head protection, and careful post-storm movement reduce avoidable risk.
Frequently asked questions
What month has the most tornadoes in North Dakota?
June has the largest count in the SPC archive used here, with 629 recorded tornadoes. Individual years can differ sharply.
How many tornadoes have been recorded in North Dakota?
The archive contains 1,654 records from 1950 through 2024. The total reflects reporting and database practices as well as weather.
What is the strongest tornado recorded in North Dakota?
The highest rating in this archive is F/EF5. Fujita and Enhanced Fujita ratings are damage-based and are not directly interchangeable wind measurements.
Data source and limits
Counts on this page come from the NOAA Storm Prediction Center historical tornado archive for 1950–2024. Older records are less complete, weaker tornado reporting increased with population and technology, and ratings changed from the Fujita scale to the Enhanced Fujita scale in 2007. A record is not a forecast.