EF1 tornado, St George to Dinwiddie, Illinois, June 30, 2014

1. EF065 to 85 mph

   Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

2. EF186 to 110 mphthis tornado

   Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

3. EF2111 to 135 mph

   Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

4. EF3136 to 165 mph

   Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

5. EF4166 to 200 mph

   Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

6. EF5over 200 mph

   Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

7. Unrated

   The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

Rating

EF1

Date

June 30, 2014

Touchdown

10:29 PM CDT (03:29 UTC)

Lifted

10:43 PM CDT (03:43 UTC)

On the ground

14 minutes

Path length

15.8 miles (25.4 km)

Path width

175 yards (160 m)

Deaths

0

Injuries

0

Counties

Kankakee and Lake counties

Touchdown point

41.200, -87.664

Lift-off point

41.178, -87.363

Record number

1406302129-03

487 damage points were recorded along this path by NWS LOT, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EFU. The highest wind the damage implies is 115 mph.

• Roof and wall sections removed from wooden barn.
• ~4,000 lb trailer picked up and moved 40-50 ft
• narrow damage path in corn
• Multiple evergreen trees snapped just above ground level.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

Extensive damage was sustained from two separate lines of thunderstorms on Monday, June 30th which was officially determined to be from two separate derecho events from Central Iowa east into Michigan and Ohio. Thunderstorms developed over Iowa during the early afternoon and organized into a forward-propagating quasi-linear convective system (QLCS) and tracked to southern Lake Michigan by early to mid evening. Meanwhile, a second complex of intense thunderstorms developed over central and eastern Iowa and also evolved into a QLCS, tracking across northern Illinois and northwest Indiana late in the evening into the overnight hours. ||Across northern Illinois and northwest Indiana, the first derecho event produced scattered straight-line wind damage, with gusts measured as high as 70 MPH. The second derecho produced far more extensive damage, with 80 to 90 MPH straight line winds and numerous tornadoes. Initial post-event surveys cataloged 18 tornadoes across northern Illinois and northwest Indiana, 17 of EF1 intensity and one of EF0 intensity. Of these 18 tornadoes, 14 were associated with a pair of large mesovortices that traveled along the Kankakee River Valley in Kankakee County, Illinois and Lake, Newton, and Jasper Counties in Indiana. ||Analysis of Google Earth satellite imagery gathered in spring of 2015 showed numerous additional areas of damage not documented in the original survey efforts. A thorough analysis of this imagery and synthesis with the original survey information led to a complete reanalysis of the Kankakee Valley tornadoes. Ultimately, 18 tornado tracks were identified alone in the Kankakee Valley, leading to a total of 22 tornadoes for northern Illinois and northwest Indiana. Of the 18 revised tornadoes, 16 of the paths were determined, in part, using satellite imagery. Further re-examination of the damage also led to a change in rating for several of the damage locations. Of the 18 reanalyzed Kankakee Valley tracks, two were rated EF2, 13 were rated EF1, and three were rated EF0. Additional details on this reanalysis, including the methods used, can be found in the Electronic Journal of Severe Storms Meteorology (Lyza et al. 2019, ���A Multi-Platform Reanalysis of the Kankakee Valley Tornado Cluster on 30 June 2014���).

Extensive damage was sustained from two separate lines of thunderstorms on Monday, June 30th which was officially determined to be from two separate derecho events from Central Iowa east into Michigan and Ohio. Thunderstorms developed over Iowa during the early afternoon and organized into a forward-propagating quasi-linear convective system (QLCS) and tracked to southern Lake Michigan by early to mid evening. Meanwhile, a second complex of intense thunderstorms developed over central and eastern Iowa and also evolved into a QLCS, tracking across northern Illinois and northwest Indiana late in the evening into the overnight hours. ||Across northern Illinois and northwest Indiana, the first derecho event produced scattered straight-line wind damage, with gusts measured as high as 70 MPH. The second derecho produced far more extensive damage, with 80 to 90 MPH straight line winds and numerous tornadoes. Initial post-event surveys cataloged 18 tornadoes across northern Illinois and northwest Indiana, 17 of EF1 intensity and one of EF0 intensity. Of these 18 tornadoes, 14 were associated with a pair of large mesovortices that traveled along the Kankakee River Valley in Kankakee County, Illinois and Lake, Newton, and Jasper Counties in Indiana. ||Analysis of Google Earth satellite imagery gathered in spring of 2015 showed numerous additional areas of damage not documented in the original survey efforts. A thorough analysis of this imagery and synthesis with the original survey information led to a complete reanalysis of the Kankakee Valley tornadoes. Ultimately, 18 tornado tracks were identified alone in the Kankakee Valley, leading to a total of 22 tornadoes for northern Illinois and northwest Indiana. Of the 18 revised tornadoes, 16 of the paths were determined, in part, using satellite imagery. Further re-examination of the damage also led to a change in rating for several of the damage locations. Of the 18 reanalyzed Kankakee Valley tracks, two were rated EF2, 13 were rated EF1, and three were rated EF0. Additional details on this reanalysis, including the methods used, can be found in the Electronic Journal of Severe Storms Meteorology (Lyza et al. 2019, ���A Multi-Platform Reanalysis of the Kankakee Valley Tornado Cluster on 30 June 2014���).

This tornado started near the intersection of E. 6000N Rd and N. County Highway 51. Roof damage was done to a barn along with numerous trees snapped and uprooted. The tornado ended along County Highway 13. Maximum winds were estimated to be 90 mph.

A tornado touched down near N. 5000E Rd and ended near N 8000E Rd. It snapped a wooden power pole and damaged corn along its path. Maximum winds were estimated to 85 mph.

This tornado began near 10000N Rd and ended near a farmstead along N. 8000E Rd. A large machine shed was heavily damaged, and trees were snapped and uprooted. Maximum winds were estimated to 95 mph.

A tornado started near the intersection of 11000N Rd and N 8000E Rd. A large shed was destroyed with all of its posts and several anchors to the posts pulled from the ground. There was also minor buckling of a house's foundation, numerous trees snapped and uprooted, a snapped wooden power pole, and damage to corn crops. The tornado dissipated near Illinois Highway 1. Maximum winds were estimated to 110 mph.

This tornado began near a farmstead on N. 8000E Rd and would end near the intersection of 9000N Rd and N. 11000E Rd. A barn was destroyed, a 4,000 lb. trailer moved 50 feet, and numerous hardwood trees were snapped and uprooted. Maximum winds were estimated to 105 mph.

This tornado began north of Momence along Illinois Highway 17, crossed the Illinois-Indiana state line and tracked near 241st Ave. in Indiana. The tornado then passed through the far south end of the town of Schneider and ended near the Kankakee River southwest of Shelby. Damage was done to a roof of a barn along with numerous hardwood trees snapped and uprooted. Maximum winds were estimated to 110 mph.

This tornado that began near the intersection of 11000N Rd and Slaughter House Rd damaged a greenhouse and brought roof damage to a house, along with snapping large tree limbs. The tornado ended near County Highway 13. Maximum winds were estimated to 75 mph.

This strong tornado touched down slightly north of the intersection between E. 10500N Rd and N. 14000E Rd. The tornado torqued a house on its foundation beyond repair and damaged a small church. There were also numerous barns and outbuildings destroyed and severe damage to several large trees. The tornado dissipated near N. 17500E Rd. Maximum winds were estimated to 115 mph.

A very short-lived tornado tracked near E. 10500N Rd. Damage occurred to both a house and a barn, to a swimming pool, and to trees. Maximum winds were estimated to 75 mph.

This tornado began near Kankakee County Highway 13 in Illinois and crossed into Indiana just south of E. 10500N Rd. A house under construction (but sealed) had an exterior wall of the garage blown out, part of a second story exterior wall blown in, and a portion of roof removed. A barn also had substantial roof damage along with numerous large trees snapped, uprooted, and partially stripped of their branches. The tornado dissipated south of Lowell, Indiana near Colfax St. Maximum winds were estimated to 110 mph.

This tornado began north of Momence along Illinois Highway 17, crossed the Illinois-Indiana state line and tracked near 241st Ave. in Indiana. The tornado then passed through the far south end of the town of Schneider and ended near the Kankakee River southwest of Shelby. Damage was done to a roof of a barn along with numerous hardwood trees snapped and uprooted. Maximum winds were estimated to 110 mph.

This tornado began near Kankakee County Highway 13 in Illinois and crossed into Indiana just south of E. 10500N Rd. A house under construction (but sealed) had an exterior wall of the garage blown out, part of a second story exterior wall blown in, and a portion of roof removed. A barn also had substantial roof damage along with numerous large trees snapped, uprooted, and partially stripped of their branches. The tornado dissipated south of Lowell, Indiana near Colfax St. Maximum winds were estimated to 110 mph.

This short-lived tornado began just west of the Illinois-Indiana state line and crossed the state line into a grove of trees and ended near Calumet Ave. There were multiple large trees downed with this tornado. Maximum winds were estimated to 90 mph.

This tornado started slightly east of the Illinois-Indiana state line and crossed U.S. Highway 41 before ending just east of Austin St. There were multiple large hardwood trees snapped and uprooted because of this tornado, as well as roof damage to a barn. Maximum winds were estimated to be 100 mph.

This short-lived tornado began just west of the Illinois-Indiana state line and crossed the state line into a grove of trees and ended near Calumet Ave. There were multiple large trees downed with this tornado. Maximum winds were estimated to 90 mph.

A tornado touched down near the intersection of U.S. Highway 41 and Belshaw Rd and tracked due east ending near Colfax Rd. Damage was done primarily to trees. Maximum winds were estimated to 110 mph.

A tornado started near Colfax St. and tracked through the south side of Shelby, through DeMotte, and ended slightly east of N. 600W Rd. A large barn was completely destroyed, and damage was done to houses in both Shelby and DeMotte. In addition, numerous hardwood trees were snapped and uprooted. Maximum winds were estimated to 110 mph.

This tornado started near Cline Avenue southwest of the community of Lowell and ended near W. 197th Rd. Numerous trees were snapped and uprooted. Maximum winds were estimated to 100 mph.

This strong tornado touched down near the intersection of Clark St and Belshaw Rd and ended slightly east of Harrison St. Outbuildings as well as two large grain bins were destroyed, and numerous large high-tension wood power poles were snapped. There was also numerous trees snapped and uprooted along with crop damage. Maximum winds were estimated to 115 mph.

This tornado began over a farmstead along Grant St and tracked due east ending near Mississippi St. A large barn was destroyed with the top half of the barn ripped off and the bottom half severely damage. Numerous trees were snapped and uprooted. Maximum winds were estimated to 105 mph.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down. One was issued for the county at another hour that day.

The county was under a severe thunderstorm watch, issued at 02:01 UTC and running to 05:16 UTC.

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The Storm Prediction Center had this point in a Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 01:00 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Kankakee (IKK), 31 km from the path, in the two hours either side.

From the Iowa Environmental Mesonet's archive of airport observations.

The Chicago radar (KLOT), 66 km away, was scanning. The volume nearest the touchdown began at 03:30 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

Local storm reports within 60 km of the path, in the three hours either side.

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

The live radar over the trackEvery 2014 tornado in IllinoisEvery tornado in Illinois since 1950Warnings in force in Illinois nowThe forecast where you are

45 more were confirmed in the United States that day.

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.