April 13, 2006 Storm Survey Results.


...Overview of the April 13th Severe Weather event...

During the late afternoon hours April 13th, thunderstorms developed in Central Iowa, and moved east along a warm front.  These thunderstorms became supercells as they moved toward Eastern Iowa.  The supercells brought wind and hail to locations along and north of Interstate 80, before three storms intensified as they approached Johnson and Linn counties.  One supercell moved east from southern Benton, through Linn, and into Jones county and produced 3 tornadoes.  Another supercell moved southeast across Johnson, Muscatine, Mercer, and portions of extreme western Rock Island counties. This storm produced many tornadoes, including a strong F2, in Iowa City.  A third supercell moved southeast across Johnson and Muscatine county behind the other storm, and produced a tornado in eastern Johnson county.   In addition to the tornadoes, these supercells produced numerous wind and large hail reports, as well as heavy rain.  Other severe thunderstorms occurred in Eastern Iowa and Illinois through the late evening and early morning hours, mainly producing large hail and strong winds.

Related Story: StormReady Hero Award 


Click on numbers for tornado stats.

Map of tornado locations

 

Local Storm Reports

Iowa City, IA Radar

Fujita Scale

F0 40-72 MPH
F1 73-112 MPH
F2 113-157 MPH
F3 158-206 MPH
F4 207-260 MPH
F5 260-318 MPH

 

 

TORNADO 1: North of Marion , Iowa ( Linn County)

  • Intensity: High F0 with wind speeds around 70 mph
  • Time: 7:40 to 7:42 pm
  • Path length: 1 mile
  • Path width: 200 yards
  • Path began near the intersection of County Home Road and North 10th Street, then moved east down County Home Road.
  • Damage: Farm outbuilding roofs and trees damaged. Recreational trailer destroyed. Concrete walls collapsed. Cattle shed collapsed killing some cattle.
Concrete walls collapsed Tree uprooted Damaged farm building

 

TORNADO 2: Near Newhall, Iowa ( Benton County)

  • Intensity: High F0 with wind speeds estimated around 70 mph
  • Time: 7:50 to 7:58 pm
  • Path length: 4.8 miles
  • Path width: 150 yards
  • Path began approximately 3 miles southeast of Van Horne and continued east to about ¾ mile south of Newhall on County Road W14.
  • Damage: Four power poles were snapped. Fences damaged.
  • Note: Downburst winds with speeds around 70 mph also destroyed a machine shed and outbuildings, blew over a tractor trailer, damaged trees and roofs, and caused minor structural damage to homes with windows blown out. The damage extended from just southwest of Van Horne eastward to the Salem Cemetery.
Destroyed machine shed Overturned tractor trailer Damaged outbuildings

 

TORNADO 3: Sharon Center, Iowa ( Johnson County)

  • Intensity: F1 with wind speeds estimated around 80 mph
  • Time: 8:16 to 8:22 pm
  • Path length: 3.6 miles
  • Path width: 0.2 miles
  • Path began near the intersection of Sharon Center Rd/W62 and 530th St. and ended ½ mile east of F62 and Lackender Ave
  • Damage: Continuous damage path with tree damage and some farm outbuildings damaged.

TORNADO 4:   Near Anamosa, Iowa ( Jones County)

  • 1 reported injury
  • Intensity: F1
  • Time: 8:15 to 8:22 pm
  • Path length: 3.7 miles
  • Path width: average ¼ mile, max ½ mile
  • Path began near the intersection of 102nd St. and 215th Ave., then moved east across Forest Chapel Rd., Route 151, and down Lead Mine Rd. It ended at Highway 64 approximately 2.9 miles southeast of Anamosa.
  • Damage: A mobile home was completely destroyed with one occupant injured. Multiple locations had garages destroyed with extensive damage to roofs and walls of homes.
Anomosa tornado damage Anomosa tornado damage Anomosa tornado damage
Anomosa tornado damage Anomosa tornado damage Anomosa tornado damage

 

TORNADO 5:   Iowa City, Iowa ( Johnson County)

Iowa City, IA Radar

Video captures of the Iowa City tornado. Taken by Ames storm chasers Ryan Pfannkuch and Ben McMillan. The map with the tornado track and city costs is courtesy of the city of Iowa City.

Iowa City Tornado 8:36pm Iowa City tornado 8:41pm Storm path and damage estimates.
  • Estimated 30 injuries treated at local hospitals
  • Intensity: High F2 with wind estimated at 155 mph
  • Time:8:29 pm to 8:37 pm
  • Path length: 4.5 miles
  • Path width: 0.3 miles
  • Path began near the junction of Highway 1 and Highway 218 and extended northeast across the heart of Iowa City, ending just south of the Highway 1 exit off I-80.
  • Damage: Continuous damage path with partial to complete roof loss as well as utility, tree, and vehicle damage. Upper portions of some exterior walls failed.
St. Patricks Parsonage next to St. Patricks Church roof
Buiding damage Building damage Dairy Queen
Motel University motor pool building Trees down
Iowa City Sorority District Iowa City Sorority District Iowa City Sorority District

The following photos are courtesy of Al Stillmunkes, a student at The University of Iowa.

Happy Joes Car dealership Overturned cars

 

TORNADO 6: Hills, Iowa ( Johnson County)

  • Intensity: High F1 with wind estimated at 110 mph
  • Time: 8:38 pm to 8:48 pm
  • Path length: 5.1 miles
  • Path width: 0.4 miles
  • Path began near the intersection of Taft Ave and 480th St., and moved east-northeast, crossing Highway 6 one mile east of its intersection with X14. The tornado then curved north and ended 0.3 miles north of the intersection of White Oak Ave and 400th St.
  • Damage: Continuous damage path with tree damage and farm outbuildings damaged and unroofed. A mobile home was destroyed as well as a portion of a roof on a home.
Mobile home

 

TORNADO 7: South of Nichols, IA (Johnson and Muscatine Counties)

  • 1 fatality
  • Intensity: F1
  • Time: 8:45 to 9:02 pm
  • Path length: 9.4 miles
  • Path width: 0.25 mile
  • Path began in Johnson County about 4 miles southeast of Lone Tree and 1 mile west of the county line. It tracked east into Muscatine County to the Red Cedar WMA, then curved to the northeast. It crossed Highway 22 then lifted about 2 miles southeast of Adams.
  • Damage: A 49 year old woman was killed in a mobile home which was destroyed 3 miles south of Nichols.
Mobile home debris Mobile home debris
Nichols, IA Outbuildings

 

TORNADO 8:   Nichols , Iowa (Johnson and Muscatine Counties)

  • Intensity: F1
  • Time: 8:48 to 8:56 pm
  • Path length: 4.8 miles
  • Path width: 0.1 miles
  • Path began 3 miles east of Lone Tree in Johnson County about ½ mile west of the county line, then tracks due east into Nichols where it curves to the northeast. The tornado lifted about 1 mile northeast of Nichols.
  • Damage: Community center was unroofed and a metal pole barn was completely destroyed.
West Nichols West Nichols looking west

 

TORNADO 9:  Muscatine, Iowa ( Muscatine and Rock Island Counties)

  • Intensity: F0
  • Time: 9:13 to 9:26 pm
  • Path length: 6.4 miles
  • Path width: 1/4 mile
  • Path began in Muscatine County about ½ mile south of the intersection of Burlington Street and the Highway 61 Bypass, then continues southeast to the Mississippi River where it crosses into Rock Island County, Illinois about 3 miles south of downtown Muscatine. The tornado then curved northeast and lifted just before reaching Highway 92. Witnesses report seeing the tornado cross the Mississippi River.
  • Damage: Intermittent F0 damage.
Billboard Debris Roof damage
Muscatine damage Muscatine damage

 

TORNADO 10: East of Iowa City, Iowa ( Johnson County)

  • Intensity: F1
  • Time: 9:19 to 9:20 pm
  • Path length: 1/2 mile
  • Path width: 25 yards
  • Brief touchdown about 6 miles east of Iowa City near the junction of F46 and Wapsi Ave.
  • Damage: Portion of a roof blown off house. This same house was damaged by a separate tornado (#6) about 30 minutes earlier.
House hit by tornado 10 and 6

 

TORNADO 11:  Buffalo Prairie, Illinois ( Rock Island and Mercer Counties)

  • Intensity: F1
  • Time: 9:29 to 9:55 pm
  • Path length: 13 miles
  • Path width: up to 1/2 mile
  • Path began just north of the Rock Island/Mercer county line near 297th St. and continues east southeast, lifting 1 mile south of the county line and about ¼ mile west of 180th St. (about 1 mile west of Hamlet).
  • Damage: Intermittent F0 and F1 damage to buildings and trees.
Telephone poles Out building Brick building

 

TORNADO 12: near LeClaire, Iowa ( Scott County) - associated with a downburst, not a supercell

  • Intensity: F1
  • Time: 9:42 to 9:45 pm
  • Path length: 1.5 miles
  • Path width: 100 yards
  • Path began just north of I-180 4 miles west of LeClaire and continues east northeast crossing 257th Ave. just south of 205th St. (about 1/2 mile east of 257th Ave.)
  • Damage: The corner of a wooden roof on a cattle building was torn off with the entire roof lifted and set back down. The south cinder block wall collapsed inward with the north wall bowing out to the northeast. A large shed door was torn off and knocked over a 100 year old tree. An east window was blown out of a corn crib (next to the cattle building) and was thrown over the farm house and landed 975 to 980 yards away to the northwest.

TORNADO 13 : Mannon, Illinois ( Mercer County)

  • Intensity: F1
  • Time: 9:57 to 10:01 pm
  • Path length: 1.5 miles
  • Path width: 100 yards
  • Path began 1 mile northwest of Mannon and tracked southeast to about .5 miles east southeast of town.
  • Damage: A mobile home was destroyed.

TORNADO 14: Matherville, Illinois ( Mercer County)

  • Intensity: Low F2 with wind estimated at 115 mph
  • Time: 10:07 to 10:11 pm
  • Path length: 2 miles
  • Path width: 50 yards
  • Path began just east of 240th street and moved generally east across the northern part of Matherville and dissipated just west of U.S. 67.
  • Damage: Two homes had roof damage with the sheriff department indicating one house was completely unroofed.

TORNADO 15: Alexis, Illinois ( Mercer County)

  • Intensity: High F1 with wind estimated at 100-110 mph
  • Time: 10:12 to 10:15 pm
  • Path length: 0.8 mile
  • Path width: 200 yards
  • Path began on the northwest side of Alexis and moved east across the northern part town. It dissipated on the east side of town close to the abandoned railroad tracks.
  • Damage: Damage path is north of First Avenue. A parsonage on the west side of town had ¾ of its roof torn off with the roof blown onto the house next door. Across the north side of town, several sheds were heavily damaged or destroyed with considerable tree damage. One house had its roof completely torn off with varying roof damage to numerous other houses. Several utility poles were snapped in half.

 

Roof damage Shed damage Tree limb
Roof damage Debris

 

 

 
Return to top of page.

F0 -  Marion, IA (Linn County) F1 - Sharon Center, IA (Johnson County) F2 - Iowa City, IA (Johnson County) F1 - Hills, Iowa ( Johnson County) F1 - Anamosa, Iowa ( Jones County) F1 - Nichols , Iowa (Johnson and Muscatine Counties) F1 - South of Nichols, IA (Johnson and Muscatine Counties) F1 - East of Iowa City, Iowa ( Johnson County) F0 - Muscatine, Iowa ( Muscatine and Rock Island Counties) F1 - Buffalo Prairie, IL (Rock Island & Mercer Counties) F1 - Mannon, Illinois ( Mercer County) F1 - Alexis, IL (Mercer County) F0 - Newhall, Iowa ( Benton County) F1 - near LeClaire, Iowa ( Scott County)


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