*Source - Storm Data Publication published by the National Climatic Data Center and severe weather reports issued by the National Weather Service.
| Date | County | Description | Length (miles) | Width (yards) | |
|---|---|---|---|---|---|
| 1 | February 10, 1990 | Oconee | (F1) A small tornado touched down in Oconee County during the early morning hours. The tornado struck a highly populated area, but because of the early morning hour, most people were safely asleep in their homes. A mobile home park near Seneca sustained $120,000 in damages and one person was injured. | 1 | 60 |
| 2 | February 10, 1990 | Pickens | (F1) A small tornado was observed 3 miles NW of Clemson. Many mobile homes and permanent structures were damaged. | 2 | 60 |
| 3 | February 10, 1990 | Pickens | (F1) A small tornado caused damage on 86 dwellings and many businesses. Total damage was estimated at about $300,000. | 3 | 100 |
| 4 | February 10, 1990 | Greenville | (F0) A weak tornado struck the Haywood Mall area at 8:00 AM EST. The tornado blew the facing off a storefront, blew down light poles, broke some glass and damaged some signs. The tornado skipped several times and then struck the Pelham Road area causing damage to homes and apartments. | 3 | 80 |
| 5 | February 10, 1990 | Spartanburg | (F1) A small tornado damaged several homes and picked up one mobile home. | 2 | 50 |
| 6 | February 16, 1990 | Kershaw | (F0) A funnel cloud that developed in Lexington County traveled eastward, touched down, briefly uprooted some trees and damaged a house 5 miles NE of Camden. | <1 | 10 |
| 7 | April 28, 1990 | Spartanburg | (F0) Several funnel clouds were observed moving slowly over the city at about 5:10 PM EST. A tornado touched down causing trees to be blown on to homes and power lines to come down. | 2 | 30 |
| 8 | April 28, 1990 | Spartanburg | (F1) A tornado touched down at Inman and produced considerable damage and four injuries; two when a mobile home was destroyed, one was hit by a truck that was blown off the road, and the last was struck with an object that flew through the window. | 6 | 50 |
| 9 | April 28, 1990 | Cherokee | (F1) A tornado touched down east of Gaffney. Damage was limited mostly to trees and utilities, but at least three permanent structures were damaged. | 5 | 40 |
| 10 | May 4, 1990 | Laurens | (F0) A small tornado touched down briefly causing some damage mainly to tombstones in a cemetery. | <1 | 20 |
| 11 | August 6, 1990 | Marlboro | (F0) A small tornado blew a car 107 feet, damaged several buildings, and cut a path through trees. | 1 | 20 |
| 12 | August 29, 1990 | Berkeley | (F1) A tornado occurred knocking down numerous trees and power lines. Power outages lasted almost a day. | 1 | 100 |
| 13 | October 22, 1990 | Calhoun | (F2) A tornado killed an 11 year old girl and injured four other persons. Three mobile homes and several other structures were damaged. | <1 | 20 |
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