The June 1990 Lower Ohio Valley tornado outbreak spawned 65 tornadoes, including seven of F4 intensity, in southern Illinois, central and southern Indiana, southwestern Ohio, and northern Kentucky on June 2–3, 1990.
In Indiana, 37 tornadoes formed, breaking the single-day record of 21 set during the Super Outbreak on April 3, 1974.
Meteorological synopsis
On June 2, an unseasonably intense surface low over eastern North Dakota brought with it a cold front across the Mississippi Valley. Ahead of the front, a highly unstable air mass combined with a strong jet stream that increased the synoptic-scale lifting favoring supercell development. Meanwhile, backed southerly low-level winds brought moist dew points well into the region.
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|bgcolor=# | F1
|S of Greenwood
|Sebastian
|AR
|
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|17:00
|
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|Roof damage to homes and outbuildings with severe damage to 29 homes.
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|bgcolor=# | F2
|Westervelt to Findlay
|Shelby
|IL
|
|
|21:30
|
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|Tornado struck Findlay, where 16 homes were destroyed and 60 others were damaged. Two people were injured.
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|bgcolor=# | F1
|W of Thorntown to SE of Colfax
|Boone
|IN
|
|
|23:10
|
|
|Windows were smashed with some damage to trees. Two barns were leveled.
Bright, Indiana/Harrison, Ohio
A violent nighttime tornado began west of Bright, Indiana, with 50 homes destroyed in that area. Four of the homes were of brick construction, yet were completely leveled. The tornado then continued to produce F4 damage in Ohio as it hit the communities of Harrison, Crosby Township, and New Baltimore. In Hamilton County alone, the tornado damaged 800–900 homes and 31 businesses plus three schools; of these, 32 homes were reported destroyed, some so completely that their foundations were left "practically barren".