Mahnomen County, Minnesota tornadoes

Checking live National Weather Service warnings for Mahnomen County...

26confirmed tornadoes since NOAA records began in 1950 (the first here in 1966). Most recent: June 24, 2023, EF2. 2026 so far: 0 preliminary reports preliminary

Join the free alerts waiting list
Map

Every tornado path in the county

Tornado paths, 1950 to 2025
Use two fingers to move the map
(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 Mahnomen County

Loading warnings...

The record

At a glance

Total261950 to 2025
Per year0.3average since 1950
Peak monthJuly13 of 26
StrongestF2Jul 5, 1978
Deaths4whole paths, see note
Injuries44whole paths, see note

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

Seasons

When tornadoes hit here

By month

130 Jan: 0Feb: 0Mar: 0Apr: 0May: 2Jun: 10Jul: 13Aug: 1Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

July is the peak month, with 13 of 26 tornadoes.

By time of day

60 12 AM: 1: 2: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 2: 0: 53 PM: 6: 0: 46 PM: 3: 1: 29 PM: 0: 0: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 3:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

30 1950: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01960: 0: 0: 0: 0: 0: 0: 2: 0: 0: 11970: 1: 0: 1: 0: 0: 1: 0: 0: 1: 01980: 0: 1: 0: 0: 0: 0: 0: 0: 0: 01990: 0: 0: 0: 0: 0: 0: 0: 0: 3: 12000: 0: 0: 2: 0: 0: 0: 0: 0: 3: 02010: 1: 0: 0: 1: 0: 1: 0: 0: 0: 22020: 0: 0: 1: 3: 0: 019501960197019801990200020102020

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
13
EF1
7
EF2
4
Unknown
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

F2, July 5, 1978

4 deaths, 44 injuries Strongest

F2, July 5, 1978

57.5 mile path Longest path

57.5 miles, F2

July 5, 1978, whole path Widest

400 yards, F2

July 5, 1978
Every tornado

All 26 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 24, 2023EF26.22 mi250 yd00
Jun 24, 2023EFU0.24 mi10 yd00
Jun 24, 2023EFU0.3 mi10 yd00
Jun 24, 2022EF13.82 mi400 yd00
May 24, 2019EF13.5 mi200 yd00
May 24, 2019EF06.56 mi200 yd00
Jun 22, 2015EF10.23 mi30 yd00
Jul 22, 2013EF221.09 mi400 yd00
Jun 17, 2010EF06 mi40 yd00
Jul 24, 2008EF01 mi25 yd00
Jul 11, 2008EF216 mi250 yd00
Jul 11, 2008EF02 mi25 yd00
Aug 11, 2002F00.2 mi25 yd00
Jul 25, 2002F13 mi50 yd00
Jul 25, 1999F00.5 min/a00
Jul 20, 1998F00.2 mi30 yd00
Jul 20, 1998F00.3 mi30 yd00
Jul 20, 1998F00.5 mi30 yd00
Jul 10, 1981F00.1 mi10 yd00
Jul 5, 1978F257.5 mi400 yd444
Jun 13, 1975F01 mi50 yd00
Jul 10, 1972F00.3 mi50 yd00
Jun 25, 1970F110.3 mi20 yd00
Jul 26, 1969F00.3 mi13 yd00
Jun 24, 1966F149.8 mi10 yd00
Nearby

Nearby counties

Coming soon

Free tornado alerts for Mahnomen County

We are building free email alerts for tornado warnings. Join the waiting list and we will email you once when they are ready. Until then, please rely on the National Weather Service and your phone's emergency alerts.

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