Lower Ohio Valley Tornado Outbreak

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The Lower Ohio Valley Tornado Outbreak is a historical tornado outbreak that occurred in southern Illinois, middle and southern Indiana, southwestern Ohio, and northern Kentucky on Saturday, June 2-3, 1990. By the end of the outbreak during the early morning hours on June 3, 65 tornadoes struck the Ohio River Valley including seven of F4 intensity. One F4 tornado trekked 94 miles from southeastern Illinois into southern Indiana killing one person.

Thirty-seven tornadoes occurred in Indiana, a record for a single day. It eclipsed the previous record of 21 held during the Super Outbreak in April 1974.^[1] Twelve tornadoes struck Illinois.^[2]

1 Event
2 Confirmed Tornadoes
3 Effects
4 See also
5 References
6 External links

[edit] Event

The National Severe Storms Forecast Center put out a high risk over much of Illinois, Indiana, Ohio, and northern Kentucky. A notable feature of this outbreak is that there was a sector of weak tornadoes north of Terre Haute and a sector of strong and violent tornadoes south of the city. Perhaps because the storms in central Indiana had weaker helicity -- a measurement of storm rotation -- and many of the storms in Central Indiana were left-moving supercells. These types are supercells are generally weaker than their right-moving counterparts.

[edit] Confirmed Tornadoes

Table of confirmed tornadoes - after surveys by local weather service offices

Confirmed Total	Confirmed F0	Confirmed F1	Confirmed F2	Confirmed F3	Confirmed F4	Confirmed F5
88	21	23	24	13	7	0

[edit] Effects

Petersburg, Indiana was the hardest hit town affected by the outbreak. It was one of two towns in Indiana that were hit by an F4 tornado. Six of the 12 people killed in Indiana were in Petersburg.

Other hard hit towns were Bedford, Indiana and Newton, Illinois. Bedford was the other town struck by an F4 tornado. One person was killed and nearly 50 more were injured. Newton also received extensive damage, but no one was killed.

[edit] See also

List of tornadoes and tornado outbreaks

[edit] References

^ Intellicast. June in the Midwest. Retrieved on 2006-10-24.
^ National Weather Service Office Indianapolis, Indiana. June 2, 1990 Tornado Outbreak. Retrieved on 2006-10-24.