Sioux County, North Dakota tornadoes

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17confirmed tornadoes since NOAA records began in 1950 (the first here in 1956). Most recent: August 28, 2024, 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 Sioux County

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The record

At a glance

Total171950 to 2025
Per year0.2average since 1950
Peak monthJune8 of 17
StrongestF1Jun 21, 1983
Deaths0whole paths, see note
Injuries0whole paths, see note

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

Seasons

When tornadoes hit here

By month

80 Jan: 0Feb: 0Mar: 0Apr: 0May: 4Jun: 8Jul: 3Aug: 2Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 8 of 17 tornadoes.

By time of day

60 12 AM: 0: 1: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 112 PM: 1: 0: 13 PM: 0: 6: 26 PM: 0: 1: 19 PM: 2: 1: 012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 4:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

20 1950: 0: 0: 0: 0: 0: 0: 1: 0: 0: 01960: 0: 0: 0: 0: 0: 0: 2: 0: 0: 01970: 0: 0: 0: 0: 0: 1: 0: 1: 0: 01980: 0: 0: 0: 1: 0: 0: 0: 0: 0: 01990: 0: 0: 0: 0: 0: 0: 1: 0: 0: 22000: 0: 0: 0: 0: 0: 2: 1: 1: 0: 12010: 2: 0: 0: 0: 0: 0: 0: 0: 0: 02020: 0: 0: 0: 0: 1: 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
4

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

Strongest

F1, June 21, 1983

0.3 mile path Longest path

2.3 miles, F0

May 17, 1975, whole path Widest

300 yards, EF1

August 28, 2024
Every tornado

All 17 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Aug 28, 2024EF12.19 mi300 yd00
May 24, 2010EF01.35 mi35 yd00
May 24, 2010EF11.63 mi40 yd00
Jun 16, 2009EF00.15 mi20 yd00
May 25, 2007EF00.3 mi200 yd00
Aug 10, 2006F02 mi70 yd00
Jun 26, 2005F02 mi30 yd00
Jun 26, 2005F02 mi20 yd00
Jun 25, 1999F10.5 mi20 yd00
Jun 6, 1999F01 mi10 yd00
Jun 28, 1996F00.1 mi15 yd00
Jun 21, 1983F10.3 mi17 yd00
Jul 4, 1977F00.1 mi10 yd00
May 17, 1975F02.3 mi17 yd00
Jul 31, 1966F00.1 mi10 yd00
Jun 24, 1966F00.1 mi10 yd00
Jul 3, 1956F00.1 mi10 yd00
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.