Cass County, Minnesota tornadoes

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31confirmed tornadoes since NOAA records began in 1950 (the first here in 1957). Most recent: June 16, 2025, EF1. 2026 so far: 0 preliminary reports preliminary

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Map

Every tornado path in the county

Tornado paths, 1950 to 2025
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(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5Unrated

Each path is a straight line from where the tornado started to where it ended, which is all most NOAA records hold. Tap a path for its details.

Recent warnings

Recent warnings in Cass County

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The record

At a glance

Total311950 to 2025
Per year0.4average since 1950
Peak monthAugust10 of 31
StrongestF4Aug 6, 1969
Deaths13whole paths, see note
Injuries99whole paths, see note

Deaths and injuries are NOAA's totals for each tornado's whole path, which can extend beyond Cass County.

Seasons

When tornadoes hit here

By month

100 Jan: 0Feb: 0Mar: 0Apr: 0May: 4Jun: 8Jul: 7Aug: 10Sep: 2Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

August is the peak month, with 10 of 31 tornadoes.

By time of day

100 12 AM: 0: 2: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 1: 0: 03 PM: 4: 4: 106 PM: 5: 2: 19 PM: 1: 0: 112 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 5:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

30 1950: 0: 0: 0: 0: 0: 0: 0: 1: 0: 01960: 0: 0: 0: 0: 2: 0: 1: 1: 1: 21970: 0: 1: 0: 0: 0: 1: 1: 3: 1: 01980: 0: 1: 1: 0: 0: 0: 0: 0: 0: 01990: 0: 3: 0: 0: 0: 0: 0: 0: 0: 02000: 0: 0: 0: 1: 0: 0: 0: 0: 1: 02010: 1: 0: 0: 1: 0: 0: 1: 3: 0: 02020: 0: 0: 2: 0: 0: 119501960197019801990200020102020

The line is the five-year average. Tornadoes before about 1953 were under-reported, and better radar since the 1990s finds more weak ones.

By rating

EF0
9
EF1
14
EF2
3
EF3
3
EF4
2

Ratings before February 2007 use the original F scale; the numbers line up with today's EF scale. Unknown means NOAA could not assign a rating.

The record

Notable tornadoes

Deadliest

F4, August 6, 1969

12 deaths, 70 injuries Strongest

F4, August 6, 1969

32.3 mile path Longest path

110.4 miles, F2

August 26, 1977, whole path Widest

880 yards, F2

August 26, 1977
Every tornado

All 31 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 16, 2025EF111.46 mi400 yd00
May 30, 2022EF14.3 mi500 yd00
May 30, 2022EF210.47 mi450 yd00
Aug 3, 2017EF00.1 mi20 yd00
Aug 3, 2017EF00.34 mi20 yd00
Aug 3, 2017EF00.2 mi10 yd00
Jun 19, 2016EF02.33 mi100 yd00
Aug 29, 2013EF112.93 mi300 yd00
Jun 17, 2010EF014.76 mi200 yd00
May 25, 2008EF04 mi25 yd00
Jun 28, 2003F00.1 mi15 yd00
Jul 5, 1991F36 mi43 yd03
Jul 5, 1991F10.3 mi10 yd10
Jul 5, 1991F22.5 mi13 yd00
Aug 18, 1982F10.3 mi10 yd00
Aug 2, 1981F10.5 mi400 yd00
Jul 12, 1978F00.1 mi50 yd00
Aug 26, 1977F326.3 mi400 yd011
Aug 26, 1977F2110.4 mi880 yd010
Jun 27, 1977F10.1 mi10 yd00
Jul 22, 1976F14.5 mi50 yd01
Jul 2, 1975F10.1 mi400 yd00
Jun 19, 1971F12 mi50 yd00
Aug 6, 1969F432.3 mi833 yd1270
Aug 6, 1969F317.3 mi167 yd04
Nearby

Nearby counties

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Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025, and SPC preliminary reports for 2026. Page built October 13, 2026.