Delaware County, Oklahoma tornadoes

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69confirmed tornadoes since NOAA records began in 1950 (the first here in 1951). Most recent: June 17, 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.

The record

At a glance

Total691950 to 2025
Per year0.9average since 1950
Peak monthMay37 of 69
StrongestF3May 20, 1957
Deaths0whole paths, see note
Injuries54whole paths, see note

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

Seasons

When tornadoes hit here

By month

370 Jan: 0Feb: 0Mar: 5Apr: 14May: 37Jun: 4Jul: 2Aug: 1Sep: 1Oct: 4Nov: 0Dec: 1JanFebMarAprMayJunJulAugSepOctNovDec

May is the peak month, with 37 of 69 tornadoes.

By time of day

100 12 AM: 1: 1: 13 AM: 0: 3: 26 AM: 1: 2: 09 AM: 0: 0: 212 PM: 1: 1: 03 PM: 2: 5: 76 PM: 6: 10: 39 PM: 7: 4: 1012 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM

Most often around 7:00 PM. Times as recorded by NOAA, mostly Central Standard Time.

By year, 1950 to 2025

130 1950: 0: 1: 0: 0: 2: 0: 0: 2: 0: 21960: 0: 0: 0: 0: 0: 0: 1: 0: 0: 11970: 0: 1: 1: 0: 3: 0: 0: 0: 0: 01980: 2: 1: 0: 0: 2: 0: 0: 0: 0: 21990: 0: 2: 1: 2: 0: 2: 0: 0: 0: 02000: 1: 0: 0: 1: 0: 0: 2: 0: 0: 02010: 1: 13: 0: 2: 0: 4: 1: 0: 0: 52020: 3: 1: 0: 0: 3: 419501960197019801990200020102020

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
11
EF1
32
EF2
17
EF3
8
Unknown
1

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

F3, May 20, 1957

20.4 mile path Longest path

31.2 miles, F2

December 29, 1972, whole path Widest

3,200 yards, EF3

May 25, 2024
Every tornado

All 69 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 17, 2025EF13.7 mi700 yd00
Apr 29, 2025EF12.3 mi450 yd00
Apr 29, 2025EF17.9 mi950 yd00
Apr 29, 2025EF18.7 mi1,000 yd00
Jul 21, 2024EFU0.1 mi75 yd00
May 25, 2024EF37.9 mi3,200 yd02
May 25, 2024EF11.8 mi650 yd00
Oct 10, 2021EF15.9 mi200 yd00
May 25, 2020EF02.2 mi300 yd00
May 25, 2020EF10.3 mi75 yd00
May 25, 2020EF00.1 mi50 yd00
May 22, 2019EF18.6 mi1,100 yd00
May 22, 2019EF216.59 mi1,100 yd00
May 20, 2019EF16.9 mi600 yd00
May 20, 2019EF221 mi2,700 yd01
Apr 30, 2019EF14.1 mi1,100 yd00
Apr 26, 2016EF110.1 mi850 yd00
May 29, 2015EF19.5 mi1,500 yd00
May 16, 2015EF16.7 mi1,100 yd00
May 16, 2015EF14.6 mi550 yd00
Apr 2, 2015EF112.3 mi800 yd01
May 31, 2013EF11.8 mi500 yd00
Apr 18, 2013EF28 mi800 yd00
May 24, 2011EF16 mi150 yd00
May 24, 2011EF17 mi150 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 12, 2026.