Tornadoes · United States · Missouri
Tornadoes in DeKalb County, Missouri
22 tornadoes have crossed DeKalb County since 1950, 1 of them surveyed so far this year and still preliminary, 73rd of the 115 counties in Missouri with a tornado on record, an average of one every 3.5 years. They have killed 3 people and injured 19. 1 was rated F4 or EF4 and above.
The rating scale
Tracks are drawn in the color of the rating. The United States rated tornadoes on Ted Fujita’s F scale until 31 January 2007 and on the Enhanced Fujita scale after it. Both run from 0 to 5, and both rate the damage rather than measure the wind: the speeds are what that damage is taken to imply.
F0 / EF040 to 72 mph on the F scale, 65 to 85 mph on the EF scale
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
F1 / EF173 to 112 mph on the F scale, 86 to 110 mph on the EF scale
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
F2 / EF2113 to 157 mph on the F scale, 111 to 135 mph on the EF scale
Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.
F3 / EF3158 to 206 mph on the F scale, 136 to 165 mph on the EF scale
Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.
F4 / EF4207 to 260 mph on the F scale, 166 to 200 mph on the EF scale
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
F5 / EF5261 to 318 mph on the F scale, over 200 mph on the EF scale
Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.
Unrated
The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.
Now
- Tornadoes
- 22
- Deaths
- 3
- Injuries
- 19
- F4 and above
- 1
- Worst on record
- F4, May 29, 2004
The deadliest in DeKalb County
The strongest
- F4 Weatherby tornado, MissouriMay 29, 2004
- F2, Leavenworth, Platte, Buchanan, Clinton and DeKalb counties, Kansas and MissouriMay 18, 1971
- F2, Buchanan, Andrew and DeKalb counties, MissouriJune 29, 1960
- F2, DeKalb County, MissouriApril 15, 2006
- F2, DeKalb County, MissouriMay 20, 1957
- F2, DeKalb County, MissouriApril 10, 1965
- F2, DeKalb County, MissouriMay 29, 2004
Every year with a tornado
The 15 years of the 76 in the record with a tornado in DeKalb County. Each year links to every tornado in Missouri that year.
Every tornado that crossed DeKalb County
22 tornadoes, newest first. 1 of them touched down in a neighboring state and ran in, so the record files it under that state rather than Missouri. The 1 at the top is this year's, from the surveying office rather than SPC's published database, and its rating is marked as preliminary.
| Date | Time | Rating | Where | Path (mi) | Width (yd) | Deaths | Injuries | Damage |
|---|---|---|---|---|---|---|---|---|
| June 10, 2026 | 3:56 PM CDT | EF0 | DeKalb | 4.3 | 75 | |||
| May 20, 2021 | 6:06 PM CDT | EF0 | DeKalb | 0.9 | 50 | $5,000 | ||
| September 9, 2014 | 10:22 PM CDT | EF0 | DeKalb | 0.8 | 25 | |||
| June 7, 2009 | 8:27 PM CDT | EF0 | DeKalb | 0.1 | 25 | |||
| June 7, 2009 | 8:13 PM CDT | EF0 | DeKalb | 0.1 | 25 | |||
| April 15, 2006 | 8:43 PM CDT | F2 | DeKalb | 13.0 | 100 | $70,000 | ||
| April 15, 2006 | 8:38 PM CDT | F0 | DeKalb | 1.5 | 50 | |||
| May 29, 2004 | 10:40 PM CDT | F0 | DeKalb | 1.0 | 50 | |||
| May 29, 2004 | 10:30 PM CDT | F4 | Weatherby tornado | 22.0 | 800 | 3 | 6 | $300,000 |
| May 29, 2004 | 10:15 PM CDT | F0 | DeKalb | 1.0 | 50 | |||
| May 29, 2004 | 9:40 PM CDT | F2 | DeKalb | 5.0 | 100 | |||
| May 29, 2004 | 8:40 PM CDT | F1 | Clinton | 20.0 | 150 | $30,000 | ||
| July 20, 1993 | 11:30 AM CDT | F0 | DeKalb | 2.0 | 50 | $500 to $5,000 | ||
| May 26, 1985 | 6:35 PM CDT | F0 | DeKalb | 0.2 | 50 | |||
| May 28, 1982 | 8:38 PM CDT | F1 | DeKalb | 0.5 | 50 | $500 to $5,000 | ||
| May 13, 1974 | 7:30 PM CDT | F1 | DeKalb | 7.8 | 50 | $5,000 to $50,000 | ||
| May 18, 1971 | 2:45 PM CDT | F2 | Leavenworth to MO | 55.4 | 100 | 6 | $5,000 to $50,000 | |
| April 10, 1965 | 3:15 PM GMT-6 | F2 | DeKalb | 9.6 | 50 | 7 | $50,000 to $500,000 | |
| August 20, 1964 | 8:30 PM GMT-5 | F1 | DeKalb | 1.5 | 10 | $500 to $5,000 | ||
| April 12, 1964 | 5:45 PM GMT-6 | F1 | Clinton | 6.2 | 50 | $500 to $5,000 | ||
| June 29, 1960 | 8:00 PM GMT-5 | F2 | Buchanan | 25.1 | 100 | $5,000 to $50,000 | ||
| May 20, 1957 | 6:00 PM GMT-5 | F2 | DeKalb | 9.8 | 200 | $5,000 to $50,000 |
Nearby
Warnings in force in DeKalb CountyThe forecast for DeKalb CountyThe live radar over DeKalb CountyEvery county in Missouri
What this means
Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.
Sources
NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.