The tornado outbreak of April 8–9, 1999 was a widespread tornado outbreak that affected the United States in early April 1999. It is best known for producing an F4 that killed four people in the Blue Ash and Montgomery, Ohio, areas.

Confirmed tornadoes

April 8 event

F#LocationCounty Time (UTC)Path lengthDamageNebraska F1NW of Aurora Hamilton 1600 A grain dryer was destroyed while several center pivots and a few outbuildings were damaged. F1NE of Clarks Merrick 1654 Five sheds were destroyed and several center pivots were damaged. F0S of Belgrade Nance 1656 A chemical applicator, a barn, and fencing were damaged. F0N of St. Edward Boone 1722 Caused heavy damage to barns and outbuildings. F1NW of Schuyler Colfax 1806 Caused damage to ten farmsteads and a church. F1W of Morse Bluff Saunders, Dodge 1807 10 buildings were damaged, including a business that was nearly destroyed. 14 homes were also damaged. F0W of Yutan Saunders 1812 Caused damage to outbuildings, center pivots, and a grain bin. F0SW of Orum Washington 1848 4 outbuildings were damaged.Iowa F1SE of Slater Story 1833 44 homes and businesses were damaged, including one destroyed. F0E of Hamburg Fremont 1908 unknownBrief touchdown with no damage. F0N of Honey Creek Pottawattamie 1918 Brief touchdown with no damage. F1Shenandoah area Page 1922 Minimal damage occurred. F1S of Clarinda Page 1936 A workhorse was killed and several homes were damaged. F1Red Oak area Montgomery 1938 Several metal buildings at a pig farm were destroyed, and an RV was overturned and tossed into a frame house, destroying it. F1NE of Clarinda Page 1948 Minimal damage occurred. F0Villisca area Montgomery 1954 Caused damage to trees and outbuildings. F4NW of Guss to SE of Casey Taylor, Adams, Cass, Adair 1954 This was a mile-wide wedge tornado. Farmsteads were swept clean by the tornado and checks and papers were carried several dozen miles from their original locations. One horse was thrown by a tornado and sustained severe injuries. 2 people were injured by the storm and damage amounts were pegged a $1 million in both Adair and Adams Counties. F4SE of Creston to NW of Granger Union, Madison, Dallas 2048 Damage amounts in Union County were pegged at $2 million, and at $350,000 in Madison County. One person was injured by the tornado. One car with its occupant was thrown 250 feet away by the tornado but was uninjured. Five coal cars were also knocked off a track F0Des Moines area Polk 2200 One house and several trees were damaged west of downtown Des Moines. F2W of New Virginia to SE of Rising Sun Warren, Polk 2213 Tornado traveled mostly through rural areas with minor property damage. F3SW of Norwood to Colfax Lucas, Warren, Marion, Jasper 2218 Three homes and a business were damaged or destroyed. 5 people were injured, and damage was pegged at around $1 million in Jasper County. F3Bloomfield to NE of Eldon Davis, Wapello 2315 64 homes and businesses in the Bloomfield area were damaged. A farmstead and outbuildings were also damaged or destroyed outside of town. In total, 178 homes and businesses were affected and 5 people were injured. F0NW of Batavia Jefferson 2325 Brief touchdown with no damage. F0SW of Richland Jefferson 2325 Brief touchdown with no damage.Missouri F1SW of Pumpkin Center Andrew, Nodaway 1930 6 homes were destroyed, and two mobile homes, barns, outbuildings, and a grain bin were damaged. F2W of Bosworth to W of Atlanta Carroll, Chariton, Macon 2120 14 homes and 9 mobile homes were destroyed, and several outbuildings were either damaged or destroyed. Also, another 40 homes and five mobile homes were damaged. A total of 85 agricultural outbuildings were destroyed and another 37 were damaged. F1N of Wheeling Livingston 2120 A machine shed, a pole barn, a grain bin, and a garage were destroyed. F2S of Atlanta to SW of Novelty Macon, Knox 2225 5 homes, 4 barns, 2 grain bins, and 3 mobile homes were destroyed. Six other homes and several outbuildings being damaged – some of the outbuildings were destroyed. F1NE of Billingsville Cooper 2230 A church was damaged and three tractor trailers overturned. F2N of Midway Boone 2255 A mobile home, seven outbuildings, a farm, and two pieces of farm equipment were destroyed. Five homes were damaged as well. F2S of La Belle to W of Derrahs Lewis 2305 A modular home, 3 regular homes, and several sheds, barns, and outbuildings were destroyed. Three homes were also damaged. F2S of Hallsville Boone 2305 A few farm equipment storage buildings, one barn, five grain bins, and a garage were destroyed. 4 homes were damaged as well. F1N of Mexico Audrain 2330 Damage to an industrial complex, including a factory which lost parts of its roof. Several sheet metal buildings were destroyed. A barn, two equipment buildings, and two grain bins were destroyed while a barn and two homes were damaged. F1S of Osage Bluff Cole 2330 Two barns were destroyed and 28 homes were damaged. F1NE of Linn Osage 0000 One mobile home was destroyed while 79 permanent homes and several businesses were damaged. F0S of High Prairie Webster 0015 A shed was destroyed. F2Louisiana, Missouri, to NW of Florence, Illinois Pike, Missouri, Pike, Illinois, Scott 0034 There was minor roof damage in Missouri. In Illinois, five barns and a grain bin were destroyed while other farm buildings, two grain bins, an equipment building, two houses, and a boat dock were damaged.Illinois F3Hamilton, Illinois/ Warsaw, Illinois Hancock 2335 176 structures, including homes and businesses were damaged or destroyed including two destroyed homes in Warsaw, with many businesses and neighborhoods destroyed in Hamilton. KHQA-TV and KOKX towers were destroyed. 4 people were injured. F0E of Disco to NE of Berwick Hancock, Henderson, Warren 0035 A farm shed lost parts of its roof. F1W of Exeter Scott 0110 One barn and three grain bins were destroyed, and several other barns were damaged. The roof of a trailer was also removed, and silos were damaged as well. F1W of Joy Prairie Morgan 0127 Several outbuildings and a barn were destroyed, while several homes, a barn, an airplane hangar and a garage were damaged. A boat was thrown off a trailer into a pond a quarter-mile away. F1Ashland area Morgan, Cass 0145 1 death – One home, two outbuildings, 17 trailers, a shed, a barn, a hog shelter, and a mobile home were destroyed. 17 houses, 20 trailers, a church, a laundromat, a city garage and brick buildings were also damaged. F1SW of Tallula Sangamon, Menard 0153 F1SW of New Douglas Madison 0318 3 farms, outbuildings, one home and a garage were damaged. F1N of Cisco Piatt 0335 1 death – A mobile home and two garages were destroyed, killing 1 and injuring 3 others. F0N of Janesville Cumberland, Coles 0432 Three homes were damaged, with a front porch and a swimming pool being destroyed.Indiana F3E of Dupont to S of Olean Jefferson, Jennings, Ripley 0756 Several homes and barns were damaged, including one severely in Jefferson County. In Jennings County, 4 barns were destroyed and two homes damaged. Two metal power line towers were toppled as well. In Ripley County, four mobile homes, one house, 21 barns, 17 outbuildings, and 5 pieces of farm equipment were destroyed, while 4 mobile homes, 28 houses, 20 barns, 15 outbuildings, 7 vehicles, and 4 pieces of farm equipment were damaged. 2 livestock were killed. Sources:

April 9 event

F#LocationCounty Time (UTC)Path lengthDamageIndiana F0NE of Wilmington Dearborn 0844 A barn was destroyed, while a silo and four homes were damaged.Ohio F1Addyston area (SW Cincinnati) Hamilton 0855 One house was destroyed and the roof of a garage was removed. F1Tipp City area Miami 0900 Several campers and RVs were destroyed, while homes and storage buildings were damaged. F4Montgomery/Blue Ash (NE Cincinnati) to NE of Loveland Hamilton, Warren 0912 4 deaths – In Hamilton County, 91 homes and apartments and 37 businesses were destroyed. 674 homes and apartments and 44 businesses were damaged. Two fatalities occurred in a home, and two others occurred in vehicles that were thrown. Hundreds of trees were snapped and uprooted along the path. Width of the tornado was a quarter-mile wide. Several homes, garages and barns were damaged in Warren County. F2S of South Lebanon Warren 0933 Two homes and a barn were damaged, including one structure that was twisted from its foundation. F1S of Middletown Champaign 1000 Caused damage to houses and mobile homes.Virginia F1N of Porter Spotsylvania 2217 Several sheds were destroyed and homes were damaged. Sources:

See also List of North American tornadoes and tornado outbreaks

External links April 9, 1999 tornado – then–WKRC-TV meteorologist Steve Horstmeyer Tornado in Cincinnati – Enquirer and Post coverage April 9, 1999 Blue Ash F4 Tornado – National Weather Service, Wilmington, Ohio Office