EF0 tornado, Allendale to Riley, Indiana, May 9, 2013

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

May 9, 2013

Touchdown

8:14 PM EDT (00:14 UTC)

Lifted

8:15 PM EDT (00:15 UTC)

On the ground

1 minutes

Path length

0.1 miles (0.2 km)

Path width

20 yards (18 m)

Deaths

0

Injuries

0

Property damage

$2,000

County

Vigo County

Touchdown point

39.376, -87.415

Lift-off point

39.376, -87.412

Record number

1305091814-01

2 damage points were recorded along this path by NWS IND, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 80 mph.

• Tree had rotted trunk near base. Nearby large tree limbs downed.

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

A thunderstorm squall line produced two small, brief tornadoes Wednesday evening near Terre Haute. The first touchdown occurred near 815 PM EDT along East Curry Road near Hultz Road about 5 miles south of Terre Haute. The tornado was observed by a storm spotter and caused damage to several trees. The tornado was rated an EF0 with winds around 80 mph. A second tornado from the same storm occurred near 825 PM EDT in Riley, about 5 miles southeast of Terre Haute. This tornado was observed by Riley volunteer fireman in a field just west of their fire station. The second tornado destroyed a small shed and downed several tree limbs. This tornado was rated an EF0 with associated winds also around 80 mph.||A cluster of showers and thunderstorms also produced a singular wind damage and hail report from central Indiana.

The tornado touchdown occurred along East Curry Road near Hultz Road, about five miles south of Terre Haute. The tornado was observed by a storm spotter and caused damage to several trees. It was rated an EF-0 with associated winds around 80 mph.

The Riley Fire Department reported a tornado traveling northwest through a field, west of the town of Riley. This tornado leveled a storage shed and downed several tree limbs at a residence off of East Gross Road, near State Road 159. This tornado was rated an EF-0 with associated winds around 80 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.

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. The outlook in force was issued at 20:01 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), 104 km away, was scanning. The volume nearest the touchdown began at 00:14 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 2013 tornado in IndianaEvery tornado in Indiana since 1950Warnings in force in Indiana nowThe forecast where you are

7 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.