EF1 tornado, Shauck to Kings Corners, Ohio, August 20, 2007

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

August 20, 2007

Touchdown

2:55 PM EDT (18:55 UTC)

Lifted

3:07 PM EDT (19:07 UTC)

On the ground

12 minutes

Path length

4.9 miles (7.9 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

Property damage

$150,000

Counties

Richland and Morrow counties

Touchdown point

40.660, -82.648

Lift-off point

40.619, -82.580

Record number

0708201255-01

A stationary boundary stretched from west to east through northern Ohio during the morning hours of the 20th, and remained nearly stationary for the next several days. In addition to producing heavy rain a few of the thunderstorms became severe.

An EF1 tornado touched down in northeastern Morrow County north of Shauck (Johnsville) shortly before 3 pm. The tornado quickly moved southeast into Richland County. In Morrow County, a distinct damage path of downed trees was observed. The tornado was on the ground in Morrow County for perhaps one half mile and had a path no more than 50 yards in width.

An EF1 tornado moved into southwestern Richland County from Morrow County around 3 pm. This occurred west of Kings Corner along Kings Corner West Road. Two farms in this area sustained damage from the tornado. The tornado then moved southeast across U.S. Highway 42 and followed Kings Corner East Road for about a mile. The tornado then crossed State Route 546 near Eckert Road and eventually lifted near the intersection of Mock Road and Mill Run Road after damaging another home. The tornado had a damage path about four and a half miles long and no more than 50 yards wide in Richland County. A distinctive damage path was visible in wooded areas. The same thunderstorm that produced this tornado was also responsible for a downburst that downed many trees in southwestern Richland County.

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

35 minutes of warning. NWS CLE issued a tornado warning for this county at 18:20 UTC, 35 minutes before the tornado touched down, in force until 19:15 UTC.

The county was under a severe thunderstorm watch, issued at 17:20 UTC and running to 21:44 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 0.02 chance of a tornado within 25 miles. The outlook in force was issued at 16:27 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 Cleveland radar (KCLE), 107 km away, was scanning. The volume nearest the touchdown began at 18:53 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 2007 tornado in OhioEvery tornado in Ohio since 1950Warnings in force in Ohio nowThe forecast where you are

2 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.