EF0 tornado, Rockford to Fleming, Indiana, April 22, 2011

1. EF065 to 85 mphthis tornado

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

2. EF186 to 110 mph

   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

EF0

Date

April 22, 2011

Touchdown

1:35 AM EDT (05:35 UTC)

Lifted

1:42 AM EDT (05:42 UTC)

On the ground

7 minutes

Path length

3.8 miles (6.1 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

Property damage

$30,000

County

Jackson County

Touchdown point

38.985, -85.897

Lift-off point

38.972, -85.828

Record number

1104222335-01

Scattered showers and thunderstorms increased in coverage as they pushed into central Indiana during the early morning hours of April the 23rd. Isolated hail, thunderstorm wind, and tornado reports were received as the storms progressed across the forecast area. The EF-0 tornado struck 2 miles north of Seymour in Jackson County.

In conjuction with the Jackson County Emergency Management Agency, the National Weather Service has determined a tornado struck Jackson County about 135 AM EDT Saturday morning. This tornado was rated as an EF-0, which means it had peak wind speeds of 65 to 85 mph. It first touched down near the intersection of State Road 11 and County Road 700 North, about 2 miles north of Seymour. It tracked east southeast on a hit skip path for about 4 miles. It left the ground for good approximately 3.5 miles east northeast of Seymour, or a half mile east of the intersection between US Highway 31 and Fleming Road. This tornado was about 100 feet across. It caused no deaths or injuries. There were several instances of structural damage, including at least one home losing part of its roof and a room damaged.

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

2 minutes of warning. NWS IND issued a tornado warning for this county at 05:33 UTC, 2 minutes before the tornado touched down, in force until 05:51 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 00:59 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 Indianapolis radar (KIND), 89 km away, was scanning. The volume nearest the touchdown began at 05:35 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 2011 tornado in IndianaEvery tornado in Indiana since 1950Warnings in force in Indiana nowThe forecast where you are

19 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.