EF0 tornado, Oilton, Texas, May 13, 2015

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 13, 2015

Touchdown

6:26 PM CDT (23:26 UTC)

Lifted

6:28 PM CDT (23:28 UTC)

On the ground

2 minutes

Path length

0.6 miles (1.0 km)

Path width

50 yards (46 m)

Deaths

0

Injuries

0

County

Webb County

Touchdown point

27.780, -98.990

Lift-off point

27.782, -98.980

Record number

1505131726-01

A stalled front along with abundant moisture and an upper level disturbance produced heavy rainfall across many areas of the Coastal Bend on May 13th, 2015. Average rain amounts of 3 to 4 inches fell with isolated amounts between 6 to 8 inches during the morning of the 13th on the south side of Corpus Christi including Flour Bluff, North Padre Island, and Mustang Island. This rainfall came on the heels of another heavy rain event, that occurred in the previous two days. ||Many streets and subdivisions in Corpus Christi were flooded. Some roads were even closed for a portion of the day. Many Corpus Christi schools delayed classes due to the widespread flooding. Similar conditions occurred in Orange Grove, Agua Dulce, and Freer. ||Several thunderstorms throughout the morning and afternoon hours exhibited signs of rotation. There were several reported funnel clouds across the area. One brief tornado touchdown was reported around 20 miles southwest of Freer in northern Webb County.

Tornado touched down over open country southwest of Freer.

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.

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 20:00 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.

Laredo International Airport (LRD), 54 km from the path, in the two hours either side.

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

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 2015 tornado in TexasEvery tornado in Texas since 1950Warnings in force in Texas 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.