National Weather Service United States Department of Commerce

March 23, 1917
Counties:  Harrison IN, Floyd, Clark IN, Jefferson KY
F-scale:  F4
Deaths:  46
Injuries:  250
Path width:  400 yards
Path length:  33 miles
Time:  3:08pm
Narrative:  One of the worst tornadoes in Kentuckiana's history.  This large tornado passed one mile north of Corydon as it moved east across central Harrison County.  Many farm buildings were damaged, and one farm was almost completely blown away.  Its occupant was found in a ditch 200 feet from the foundation, unconscious, critically injured, and holding her unharmed baby. The twister moved east-northeast from three miles west of New Albany and cut a swath of death and destruction through the north side of town.  Damage totaled $1,500,000 as 500 homes were destroyed, along with two schools and many other buildings.  While many homes were swept away, the deaths were concentrated in groups, including at least five (possibly 12) deaths at the Olden Street School, eight deaths at a wood specialties plant, and five deaths in one home.  Some children were killed on their way home from school.  The tornado dissipated after striking Harrod's Creek, Kentucky.
Note: Grazulis counts this as two tornadoes, with a gap in the path at the Harrison/Floyd County line. More recent research by Gary Purlee and Cody Moore indicate that this was actually one tornado.

June 2, 1990
Counties:  Floyd, Clark IN
F-scale:  F3
Deaths:  0
Injuries:  7
Path width:  300 yards
Path length:  12 miles
Time:  9:57pm
Grazulis narrative:  Moved east-northeast from one mile northwest of Galena to Sellersburg, passing through Floyds Knobs and Hamburg.  Over 25 homes and mobile homes were destroyed.  A bowling alley and several businesses were damaged at Sellersburg.
Noted discrepancies:  SPC gives an endpoint longitude of -85.75, NCDC gives -85.78.  SPC more closely agrees with Grazulis.  Grazulis lists this tornado at 10:57pm.

June 6, 1990
Counties:  Floyd
F-scale:  F0
Deaths:
Injuries:
Path width:
Path length:
Time:  2:37pm
Noted discrepancies:  None

April 20, 1996
Counties:  Floyd
F-scale:  F2
Deaths:
Injuries:
Path width:
Path length:
Time:  12:08am
Notes:  Storm Data mentions damage at the intersection of Georgetown and Greenville roads.

May 27, 2004
Counties:  Floyd
F-scale:  F1
Deaths:
Injuries:
Path width:
Path length:
Time:  7:55pm
Notes:  Storm Data takes this tornado from half a mile north of Georgetown to 2.8 miles east southeast of Georgetown.  It moved nearly parallel to IN 64.  It lifted near the IN 64/I-64 interchange, near Edwardsville.

May 30, 2004
Counties:  Floyd
F-scale:  F0
Deaths:
Injuries:
Path width:
Path length:
Time:  2:40pm
Notes:  Storm Data takes this tornado from one and a half miles south of Georgetown to half a mile southeast of Edwardsville.  It traveled along I-64 south of Georgetown.

January 17, 2012
County:  Floyd
EF-Scale:  EF1
Deaths:  0

Injuries:  0
Path width:  50 yards
Path length:  1.2 miles
Time:  11:00am EST
Notes:  
EF-1 tornado first touched down on East Riley Rd. in Floyds Knobs, where a garage was destroyed. The tornado continued east across the Knobs toward Binford Rd, where it took multiple trees down. The tornado crossed Paoli Pike just north of I-265 and caused roof damage at the Knob Point Apartments.