Gregory County, South Dakota tornadoes

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

28confirmed tornadoes since NOAA records began in 1950 (the first here in 1952). Most recent: July 28, 2025, 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 Gregory County

Loading warnings...

The record

At a glance

Total281950 to 2025
Per year0.4average since 1950
Peak monthJune11 of 28
StrongestF3May 15, 1962
Deaths0whole paths, see note
Injuries9whole paths, see note

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

Seasons

When tornadoes hit here

By month

110 Jan: 0Feb: 0Mar: 0Apr: 0May: 8Jun: 11Jul: 5Aug: 3Sep: 1Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 11 of 28 tornadoes.

By time of day

50 12 AM: 0: 0: 03 AM: 0: 0: 06 AM: 0: 0: 09 AM: 0: 0: 012 PM: 0: 1: 03 PM: 4: 3: 56 PM: 5: 2: 29 PM: 3: 1: 212 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: 1: 0: 1: 0: 0: 0: 0: 11960: 0: 0: 3: 0: 0: 1: 1: 2: 1: 01970: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01980: 0: 0: 0: 0: 0: 3: 0: 0: 0: 01990: 0: 0: 0: 1: 0: 0: 0: 0: 0: 12000: 0: 0: 1: 2: 0: 0: 0: 2: 0: 02010: 2: 0: 0: 0: 0: 0: 0: 0: 0: 22020: 0: 0: 0: 0: 0: 319501960197019801990200020102020

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
15
EF1
5
EF2
6
EF3
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

Strongest

F3, May 15, 1962

0.1 mile path Longest path

47.9 miles, F1

May 21, 1962, whole path Widest

817 yards, F0

June 12, 1962
Every tornado

All 28 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jul 28, 2025EF27.43 mi175 yd00
Jul 28, 2025EF02.71 mi50 yd00
Jul 28, 2025EF111.66 mi150 yd00
Aug 6, 2019EF13.82 mi75 yd02
Jun 30, 2019EF00.65 mi25 yd00
Jul 23, 2010EF00.2 mi50 yd00
Jul 23, 2010EF00.15 mi50 yd00
May 5, 2007EF00.1 mi50 yd00
May 5, 2007EF00.1 mi50 yd00
Jun 9, 2003F04 mi400 yd00
Jun 9, 2003F00.1 mi50 yd00
Aug 9, 2002F22 mi200 yd00
Jun 22, 1999F01 mi100 yd00
Jun 23, 1993F23 mi100 yd00
Sep 4, 1985F13 mi50 yd00
May 30, 1985F00.1 mi10 yd00
May 28, 1985F00.1 mi10 yd00
Jun 20, 1968F233.5 mi10 yd00
Jun 18, 1967F00.1 mi10 yd00
Jun 18, 1967F00.1 mi10 yd00
Jun 4, 1966F21 mi800 yd00
May 8, 1965F31.5 mi20 yd00
Jun 12, 1962F07.8 mi817 yd00
May 21, 1962F147.9 mi10 yd02
May 15, 1962F30.1 mi10 yd00
Nearby

Nearby counties

Coming soon

Free tornado alerts for Gregory 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.