Tornadoes · United States · Ohio

Tornadoes in Warren County, Ohio

36 tornadoes have crossed Warren County since 1950, 1 of them surveyed so far this year and still preliminary, 7th of the 88 counties in Ohio with a tornado on record, an average of one every 2.1 years. They have killed 6 people and injured 184. 3 were 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.

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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
36
Deaths
6
Injuries
184
F4 and above
3
Worst on record
F4, April 9, 1999

The deadliest in Warren County

  1. F4 Blue Ash tornado, OhioApril 9, 19994 killed, 65 injured
  2. F4, Hamilton and Warren counties, OhioApril 3, 19742 killed, 39 injured

The strongest

  1. F4, Dearborn, Hamilton, Butler and Warren counties, Indiana and OhioJune 2, 1990F4, 33.0 mi (53 km)
  2. F4, Hamilton and Warren counties, OhioApril 3, 1974F4, 19.8 mi (32 km)
  3. F4 Blue Ash tornado, OhioApril 9, 1999F4, 10.0 mi (16 km)
  4. F3, Butler, Warren, Clinton and Greene counties, OhioMay 10, 1969F3, 54.5 mi (88 km)
  5. F2, Warren, Clinton and Fayette counties, OhioSeptember 14, 1990F2, 35.0 mi (56 km)
  6. F2, Warren County, OhioApril 3, 1974F2, 9.8 mi (16 km)
  7. F2, Warren County, OhioApril 9, 1999F2, 1.5 mi (2 km)
  8. F2, Warren County, OhioApril 2, 1975F2, 1.0 mi (2 km)

Every year with a tornado

The 20 years of the 76 in the record with a tornado in Warren County. Each year links to every tornado in Ohio that year.

YearTornadoesDeathsInjuriesStrongest
20261EF0
20254EF0
20246EF1
20221EF0
20171EF0
20161EF1
20123EF0
20062F1
20051F0
19993465F4
19921F1
19911F0
1990243F4
19771F0
19761F0
197513F2
19743248F4
1969125F3
19591F0
19561F1

Every tornado that crossed Warren County

36 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 Ohio. 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.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
August 1, 20268:23 PM EDTEF0Warren1.8100
April 2, 20251:02 AM EDTEF0Warren8.5200$200,000
April 2, 202512:58 AM EDTEF0Warren3.0200$60,000
March 30, 20259:07 PM EDTEF0Warren3.0150$100,000
March 30, 20258:52 PM EDTEF0Butler11.7200$265,000
July 29, 20241:40 AM EDTEF1Warren8.0200$50,000
May 7, 202410:27 PM EDTEF0Warren0.5150$50,000
May 7, 202410:15 PM EDTEF1Warren2.7350$500,000
May 7, 202410:14 PM EDTEF0Warren0.450$20,000
May 7, 202410:08 PM EDTEF1Warren2.6150$200,000
May 7, 202410:05 PM EDTEF0Warren0.3100$15,000
March 23, 20223:42 PM EDTEF0Warren1.750$12,000
May 24, 20177:47 PM EDTEF0Warren0.225
June 23, 20163:03 AM EDTEF1Warren20.7250$360,000
May 1, 20126:24 PM EDTEF0Warren0.050$10,000
May 1, 20126:20 PM EDTEF0Warren0.010$5,000
March 23, 20128:30 PM EDTEF0Warren0.450$20,000
July 11, 20067:49 PM EDTF0Warren0.325$10,000
July 11, 20067:20 PM EDTF1Warren4.050$200,000
August 30, 20055:45 PM EDTF0Warren2.0300$20,000
August 24, 19993:28 PM EDTF0Warren10.0500$50,000
April 9, 19995:33 AM EDTF2Warren1.5100$2.5 million
April 9, 19995:12 AM EDTF4Blue Ash tornado10.0270465$85 million
July 12, 19928:29 PM EDTF1Warren0.1200$50,000 to $500,000
August 20, 19912:45 PM EDTF0Warren0.120$5,000 to $50,000
September 14, 19904:45 PM EDTF2Warren35.02006$500,000 to $5 million
June 2, 199010:00 PM CDTF4Dearborn to OH33.01,35037$5 million to $50 million
October 1, 19776:55 AM EDTF0Warren0.350$50,000 to $500,000
June 24, 19767:15 PM EDTF0Clermont10.110$50,000 to $500,000
April 2, 19759:25 PM EDTF2Warren1.0503$500,000 to $5 million
May 18, 19745:00 PM EDTF1Warren3.340$5,000 to $50,000
April 3, 19746:00 PM EDTF2Warren9.81779$500,000 to $5 million
April 3, 19745:28 PM EDTF4Hamilton19.8350239$50,000 to $500,000
May 10, 19694:10 PM GMT-4F3Butler54.540025$500,000 to $5 million
May 22, 19594:15 PM GMT-4F0Warren0.110$500 to $5,000
June 26, 19563:10 PM GMT-4F1Warren2.050$500 to $5,000

Nearby

Warnings in force in Warren CountyThe forecast for Warren CountyThe live radar over Warren CountyEvery county in Ohio

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.