Tornado History Map

Lyman County, South Dakota tornado history

47 tornadoes recorded in or across Lyman County from 1960 to 2025, 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 Lyman County

The Storm Prediction Center records 47 tornadoes whose paths touched Lyman County, South Dakota between 1960 and 2025. None of them is recorded as having killed anyone. The busiest month is July, with 27 tornadoes. The strongest was an F3 on 9 July 1971. The most recent was on 15 July 2025.

  • 47tornadoes
  • 0deaths
  • 2injuries
  • 286per 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 Lyman County?

RatingTornadoesShare
F0 / EF03370%
F1 / EF1817%
F2 / EF236%
F3 / EF324%
F4 / EF400%
F5 / EF500%
Unknown rating12%

Lyman County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 22 in 1980s.1960s51970s51980s221990s62000s42010s32020s2

The 2020s only run to 2025, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1960s5
1970s5
1980s22
1990s6
2000s4
2010s3
2020s2
Tornadoes by month
Bar chart of tornadoes by period. The most is 27 in Jul.Jan0Feb0Mar0Apr0May4Jun10Jul27Aug6Sep0Oct0Nov0Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar0
Apr0
May4
Jun10
Jul27
Aug6
Sep0
Oct0
Nov0
Dec0

Records for Lyman County

  • Strongest: South Dakota tornado9 July 1971, F3, 2 injuries, 0.1 miles long
  • Longest path: South Dakota tornado25 July 1960, F2, 10.4 miles long
  • Most recent: South Dakota tornado15 July 2025, EF0, 0 miles long

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

More in South Dakota

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