Tornado History Map

Custer County, Montana tornado history

10 tornadoes recorded in or across Custer County from 1962 to 2014, 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 Custer County

The Storm Prediction Center records 10 tornadoes whose paths touched Custer County, Montana between 1962 and 2014. None of them is recorded as having killed anyone. The busiest month is July, with 4 tornadoes. The strongest was an F2 on 18 July 1962. The most recent was on 31 May 2014.

  • 10tornadoes
  • 0deaths
  • 0injuries
  • 26per 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 Custer County?

RatingTornadoesShare
F0 / EF0660%
F1 / EF1110%
F2 / EF2330%
F3 / EF300%
F4 / EF400%
F5 / EF500%
Unknown rating00%

Custer County tornadoes over time

Tornadoes by decade
Bar chart of tornadoes by period. The most is 3 in 1990s.1960s21970s11980s21990s32010s2

The 2010s only run to 2014, so that bar is for a shorter period. The record starts in 1950.

Show the numbers
PeriodCount
1960s2
1970s1
1980s2
1990s3
2010s2
Tornadoes by month
Bar chart of tornadoes by period. The most is 4 in Jul.Jan0Feb0Mar0Apr0May2Jun3Jul4Aug1Sep0Oct0Nov0Dec0
Show the numbers
PeriodCount
Jan0
Feb0
Mar0
Apr0
May2
Jun3
Jul4
Aug1
Sep0
Oct0
Nov0
Dec0

Records for Custer County

  • Strongest and Longest path: Montana tornado18 July 1962, F2, 40.6 miles long
  • Most recent: Montana tornado31 May 2014, EF0, 0.1 miles long

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

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