The September 23, 1999 Edition of WCW Thunder is a Professional wrestling television show of World Championship Wrestling's, which took place on September 23, 1999 at the Norfolk Scope in Norfolk, Virginia
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Kidman defeated Lodi (w/ Lenny) (6:44)
- Brandi Alexander defeated Mona (4:58)
- Perry Saturn defeated Chavo Guerrero Jr. (6:15)
- Van Hammer defeated Prince Iaukea (4:58)
- Eddie Guerrero defeated Rick Steiner by DQ (3:47)
- Lenny (w/ Lodi) (c) defeated Evan Karagias to retain the WCW World Cruiserweight Championship (8:37)
- Sid Vicious (w/ Rick Steiner) (c) defeated Booker T to retain the WCW United States Championship (4:27)