Slope County, North Dakota tornado history

14 tornadoes recorded in or across Slope County from 1952 to 2010, coloured by rating on the map.

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Years1950 to 2025
Rating (F or EF scale)

Shows tornadoes that started in, or crossed, the chosen state. To see how many have passed near you, search a town or ZIP code, or tap the map.

Key
  • F0 / EF0 Light damage
  • F1 / EF1 Moderate damage
  • F2 / EF2 Considerable damage
  • F3 / EF3 Severe damage
  • F4 / EF4 Devastating damage
  • F5 / EF5 Incredible damage
  • Unknown Not rated (2007 onwards)

How to read the lines. Each line is one tornado, drawn from where it started to where it ended, coloured and sized by its rating. A dot means the record has no end point. Tap a line for its details, or tap anywhere else to see how many tornadoes have passed nearby. Weaker tornadoes appear as you zoom in. Ratings use the Fujita (F) scale before 1 February 2007 and the Enhanced Fujita (EF) scale from then on.

Tornadoes in Slope County

The Storm Prediction Center records 14 tornadoes whose paths touched Slope County, North Dakota between 1952 and 2010. They killed 1 person and injured 4. The busiest month is July, with 5 tornadoes. The strongest was an F4 on 29 June 1975. The most recent was on 9 September 2010.

  • 14tornadoes
  • 1death
  • 4injuries
  • 115per 10,000 sq mi of land

A tornado that crossed several counties counts in each one, so county counts add up to more than the state's.

How strong were the tornadoes in Slope County?

RatingTornadoesShare
F0 / EF0750%
F1 / EF1536%
F2 / EF200%
F3 / EF317%
F4 / EF417%
F5 / EF500%
Unknown rating00%

Slope County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 3 in 1970s.1950s11960s21970s31980s21990s32000s12010s2

The 2010s only run to 2010, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1950s1
1960s2
1970s3
1980s2
1990s3
2000s1
2010s2
Tornadoes by month
Bar chart of tornadoes by period. The most is 5 in Jul.Jan0Feb0Mar0Apr0May2Jun4Jul5Aug2Sep1Oct0Nov0Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar0
Apr0
May2
Jun4
Jul5
Aug2
Sep1
Oct0
Nov0
Dec0

Records for Slope County

Notable tornadoes in Slope County

Many of these tornadoes killed or injured people. The numbers are the official record's, and they may be revised.

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