EF1 tornado, Grove City, Ohio, April 3, 2018

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

April 3, 2018

Touchdown

5:37 PM EDT (21:37 UTC)

Lifted

5:41 PM EDT (21:41 UTC)

On the ground

4 minutes

Path length

2.6 miles (4.2 km)

Path width

75 yards (69 m)

Deaths

0

Injuries

0

Property damage

$120,000

County

Franklin County

Touchdown point

39.859, -83.083

Lift-off point

39.875, -83.038

Record number

1804031537-01

Severe thunderstorms and tornadoes developed ahead of a strong cold front. Between one to three inches of rain fell across the region.

The tornado initially touched down just south of Orders Road and moved northeast, crossing Hoover Road and I-71, and eventually White Road before lifting just north of White Road and just south of Stringtown Road.||The most significant damage along this path occurred on the west side of I-71, first near Orders Road where 4 large utility poles were snapped at the base and lying across Orders Road. Structural damage was found to multiple townhouses and other structures on the west side of Hoover Road, where a newly built detached garage was completely destroyed, and several townhouses had partial uplift and removal of roofing and damage to exterior walls. Many townhouses had garage doors pushed in, with portions of roofs removed. Debris spatter was indicated on all 4 sides of several structures. Four more large electrical transmission poles were snapped on the west side of Hoover Road. Eyewitness photos and videos confirm a tornado on the ground in this area. The most significant damage in this area was consistent with wind speeds around 105 mph and represents the strongest of the winds associated with this tornado.||As the tornado crossed I-71, it began to weaken and lift as damage became lighter and more intermittent, consisting of tree and minor structural damage to roofing materials. Still, many homes immediately east of I-71 suffered at least minor damage and/or tree damage before the tornado lifted.

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

14 minutes of warning. NWS ILN issued a tornado warning for this county at 21:23 UTC, 14 minutes before the tornado touched down, in force until 21:49 UTC.

The county was under a tornado watch, issued at 17:16 UTC and running to 23:33 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 Enhanced Risk, with a 0.10 chance of a tornado within 25 miles, in the hatched area where significant tornadoes were expected. The outlook in force was issued at 19:33 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.

The Cincinnati radar (KILN), 82 km away, was scanning. The volume nearest the touchdown began at 21:38 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 2018 tornado in OhioEvery tornado in Ohio since 1950Warnings in force in Ohio nowThe forecast where you are

21 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.