EF1 tornado, (Dal)Love Fld Dallas to Gribble, Texas, May 24, 2015

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

May 24, 2015

Touchdown

2:34 AM CDT (07:34 UTC)

Lifted

2:36 AM CDT (07:36 UTC)

On the ground

2 minutes

Path length

1.1 miles (1.8 km)

Path width

80 yards (73 m)

Deaths

0

Injuries

0

Property damage

$600,000

County

Dallas County

Touchdown point

32.875, -96.956

Lift-off point

32.889, -96.966

Record number

1505240134-01

32 damage points were recorded along this path by NWS FWD, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF1. The highest wind the damage implies is 105 mph.

• a/c on roof of CVS turned over. multiple leaks inside store. light damage to facade over door
• damage to timber decorations around apartment office

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

For several days, a stalled cold front, combined with abundant moisture from the Gulf of Mexico combined to produce widespread rain and thunderstorms in Texas. Several rounds of strong to severe thunderstorms occurred during a four day period, producing flash flooding, and numerous reports of large hail. Tornadoes affected areas in central Texas, from near Lampasas to a deadly tornado in Milam County.

A National Weather Service damage survey team found evidence of a fast moving tornado in the city of Dallas, Farmer's Branch, and Carrollton. The damage was relatively minor, with only a few trees blown down, but there were a seven buildings which suffered roof damage.

A National Weather Service damage survey team found evidence of a separate tornado in Dallas County, this time in the city of Irving. The tornado began just north of a golf course in the Los Colinas subdivision, just south of US 114. the tornado moved north and northwest, damaging several trees, two high rise buildings, and several carports. The tornado itself was doing damage for less than three minutes according to eyewitnesses.

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

7 minutes of warning. NWS FWD issued a tornado warning for this county at 07:27 UTC, 7 minutes before the tornado touched down, in force until 07:45 UTC.

The county was under a tornado watch, issued at 03:00 UTC and running to 09:00 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 Marginal Risk. The outlook in force was issued at 05:47 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.

Dallas/Ft Worth (DFW), 7 km from the path, in the two hours either side.

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

The Dallas/Ft Worth radar (KFWS), 47 km away, was scanning. The volume nearest the touchdown began at 07:34 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 2015 tornado in TexasEvery tornado in Texas since 1950Warnings in force in Texas nowThe forecast where you are

17 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.