Chouteau County, Montana tornadoes

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

17confirmed tornadoes since NOAA records began in 1950 (the first here in 1960). Most recent: June 23, 2018, EF0. 2026 so far: 1 preliminary report 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 Chouteau County

Loading warnings...

The record

At a glance

Total171950 to 2025
Per year0.2average since 1950
Peak monthJune8 of 17
StrongestF3Jul 5, 1988
Deaths0whole paths, see note
Injuries7whole paths, see note

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

Seasons

When tornadoes hit here

By month

80 Jan: 0Feb: 0Mar: 0Apr: 0May: 0Jun: 8Jul: 8Aug: 1Sep: 0Oct: 0Nov: 0Dec: 0JanFebMarAprMayJunJulAugSepOctNovDec

June is the peak month, with 8 of 17 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: 0: 23 PM: 3: 0: 56 PM: 2: 2: 19 PM: 2: 0: 012 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

40 1950: 0: 0: 0: 0: 0: 0: 0: 0: 0: 01960: 1: 0: 0: 1: 0: 1: 0: 0: 0: 01970: 0: 0: 0: 1: 0: 0: 0: 0: 0: 01980: 1: 0: 0: 0: 0: 0: 0: 0: 4: 01990: 1: 0: 1: 0: 2: 0: 0: 0: 1: 12000: 0: 0: 0: 0: 0: 0: 0: 0: 0: 02010: 0: 0: 1: 0: 0: 0: 0: 0: 1: 02020: 0: 0: 0: 0: 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. This year so far: 1 preliminary reports.

By rating

EF0
10
EF1
4
EF3
3

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, July 5, 1988

3 mile path Longest path

12 miles, F3

July 5, 1988, whole path Widest

200 yards, F3

July 5, 1988
Every tornado

All 17 tornadoes, newest first

DateRatingPath lengthWidthDeathsInjuries
Jun 23, 2018EF01.41 mi50 yd00
Jun 5, 2012EF01.05 mi100 yd00
Jul 7, 1999F00.2 mi20 yd00
Jun 19, 1998F11 mi30 yd00
Jun 26, 1994F00.1 mi10 yd00
Jun 26, 1994F00.1 mi10 yd00
Jun 26, 1992F00.1 mi10 yd00
Jul 5, 1990F00.1 mi10 yd00
Jul 5, 1988F00.2 mi10 yd00
Jul 5, 1988F312 mi200 yd00
Jul 5, 1988F310 mi200 yd00
Jul 5, 1988F33 mi200 yd02
Jun 1, 1980F10.1 mi10 yd00
Aug 4, 1973F00.1 mi10 yd00
Jul 10, 1965F10.2 mi10 yd05
Jul 3, 1963F00.1 mi10 yd00
Jun 29, 1960F10.3 mi10 yd00
This year

2026 preliminary reports not yet confirmed

Report dateLocationRating
May 13, 202610 WNW Big SandyNot yet rated

Preliminary reports from the Storm Prediction Center. One tornado can be reported more than once, and NOAA confirms the final record months later.

Nearby

Nearby counties

Coming soon

Free tornado alerts for Chouteau 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 14, 2026.