# Tornado outbreak of May 15–17, 2013

A small but damaging tornado outbreak impacted northern Texas, south-central Oklahoma, northern Louisiana, and northern Alabama in mid-May 2013. The outbreak was the result of an upper-level shortwave trough that tracked across the Southern Plains of the United States. An associated low-pressure area and atmospheric instability resulted in the formation of tornadoes across northern Texas and Oklahoma on May 15. Afterwards the storm system weakened as it tracked eastward, though six additional tornadoes were reported in Texas, Louisiana, and Alabama in the two days following May 15. Over a period of nearly two days, the storm system produced 26 tornadoes in four states. The strongest of these was an EF4 tornado which struck Hood County, Texas on May 15. However, on May 16 and May 17 no tornadoes were confirmed to have been stronger than EF1 intensity. In addition to tornadoes, large hail was reported, peaking at 4 in (10 cm) in diameter near Mineral Wells, Texas on May 15.
The EF4 tornado in Hood County, Texas, accounted for all six deaths caused by the severe storms, making it the first deadly tornado event in Texas since the 2007 Piedras Negras-Eagle Pass tornadoes. An additional 63 people were injured, many of which were due to the same EF4 tornado. A second tornado, rated EF3, was similarly damaging and impacted areas southwest of Cleburne, Texas, injuring seven. Damage across the four states due to the storm system reached roughly $272 million in damage.

## Meteorological synopsis

The outbreak was caused by an upper-level shortwave trough that moved northeastward from Mexico into the Southern Plains states during the nighttime the morning of May 15. The Storm Prediction Center (SPC) in Norman, Oklahoma, a division of the National Weather Service, initially issued a slight risk of severe thunderstorms early that morning over northwestern Texas, for a threat of large hail and damaging winds. A low-pressure area associated with the trough moved over Oklahoma that day, producing light to moderate rainfall and non-severe thunderstorms across that state into parts of North Texas. Later forecasts expanded the slight risk further into northern and Central Texas, and later into far southern Oklahoma, and indicated an enhanced risk of a few isolated tornadoes in North Texas.
The atmosphere began to destabilize due to a decrease in cloud cover over western and central Texas; the sunshine and heating, combined with sufficient wind shear and abundant low-level moisture, combined to produce a very unstable air mass. The SPC issued a severe thunderstorm watch from southern Oklahoma to central Texas that afternoon around 3:00 p.m. CDT. Supercells broke out in parts of northwestern Texas during the late afternoon hours, one of which developed the first tornado of the day at 5:38 p.m., near Belcherville in Montague County. A second tornado spawned by the same storm, rated as an EF1, touched down near Lake Amon G. Carter, damaging four homes and destroying one. As forecasters realized that conditions now favored tornadic activity, the SPC issued a tornado watch from far southern Oklahoma into central Texas at 6 p.m. CDT, replacing parts of the original severe thunderstorm watch.
At 7:13 p.m. CDT, storm spotters reported a large tornado on the ground near Millsap in Parker County, which caused roof damage to several homes in the town. This tornado remained on the ground as another tornado began to intensify near Mile Marker 409 on I-20 southeast of Weatherford, Texas at 7:19 p.m. NWS doppler radar briefly detected both tornadoes, indicating the storm was a cyclical supercell (a type of supercell that can produce successive tornadoes), before the Millsap tornado finally dissipated.
An EF4 tornado hit the town of Granbury, Texas in Hood County around 8 p.m. CDT, damaging or destroying around 100 homes and killing six people, with the most severe damage occurring in the Rancho Brazos neighborhood; the Granbury storm was the first violent tornado to hit North Texas since an F4 tornado killed three people in Lancaster in Dallas County on April 25, 1994. The supercell that produced the Granbury tornado later spawned a very large EF3 tornado that hit the Fort Worth suburb of Cleburne in Johnson County around 9:30 p.m. CDT, producing its most significant damage just east of Lake Pat Cleburne. The last twister of the outbreak touched down at 12:19 a.m., producing EF1 damage in the Ellis County town of Ennis, Texas, south-southeast of Dallas. In total, the system produced at least 16 tornadoes that afternoon and evening across north and central Texas, from Montague to Coryell counties.
The system continued to spin up tornadoes on May 16 and 17, though not of the same severity as the storms that occurred on the 15th, each causing only minor to moderate damage of EF0 and EF1 intensity. Four additional tornadoes occurred near the Shreveport metropolitan area on May 16, two of which touched down near Waskom, Texas, and two in Caddo Parish near the towns of Greenwood and Stonewall, Louisiana. Two short-lived tornadoes touched down in Limestone County, Alabama on May 17, causing scattered damage to trees, roofs and a barn.

## Confirmed tornadoes

Confirmed tornadoes by Enhanced Fujita rating :
| EFU | EF0 | EF1 | EF2 | EF3 | EF4 | EF5 | Total |
| 0 | 19 | 10 | 0 | 1 | 1 | 0 | 31 |

### May 15 event

List of confirmed tornadoes – Wednesday, May 15, 2013 :
| EF# | Location | County / Parish | State | Start Coord. | Time (UTC) | Path length | Max width | Summary |
| EF0 | WNW of Belcherville | Montague | TX | 33°48′50″N 97°52′52″W﻿ / ﻿33.814°N 97.881°W﻿ / 33.814; -97.881﻿ (Belcherville (May 15, EF0)) | 2233 – 2236 | 1.11 mi (1.79 km) | 70 yd (64 m) | A brief tornado caused damage to a ranch. |
| EF0 | SW of Priddy | Mills | TX | 31°39′18″N 98°34′48″W﻿ / ﻿31.655°N 98.58°W﻿ / 31.655; -98.58﻿ (Priddy (May 15, EF0)) | 2314 – 2318 | 3.42 mi (5.50 km) | 50 yd (46 m) | This tornado remained over open fields and downed several trees. |
| EF0 | WNW of Ada | Pontotoc | OK | 34°46′50″N 96°42′30″W﻿ / ﻿34.7805°N 96.7083°W﻿ / 34.7805; -96.7083﻿ (Ada (May 15, EF0)) | 2334 – 2335 | 0.5 mi (0.80 km) | 50 yd (46 m) | A mobile home was damaged and several trees were downed. |
| EF0 | SSE of Mineral Wells | Palo Pinto | TX | 32°46′16″N 98°04′19″W﻿ / ﻿32.771°N 98.072°W﻿ / 32.771; -98.072﻿ (Mineral Wells (May 15, EF0)) | 2341 – 2342 | 0.3 mi (0.48 km) | 50 yd (46 m) | A brief tornado caused no damage. |
| EF1 | NE of Nocona | Montague | TX | 33°50′42″N 97°40′59″W﻿ / ﻿33.845°N 97.683°W﻿ / 33.845; -97.683﻿ (Lake Nocona (May 15, EF1)) | 2350 – 2355 | 1.01 mi (1.63 km) | 200 yd (180 m) | A mobile home slid off of its foundation, a few site-built homes were damaged, and several trees were downed near Lake Nocona. |
| EF1 | WSW of Sunset | Montague | TX | 33°26′02″N 97°53′24″W﻿ / ﻿33.434°N 97.89°W﻿ / 33.434; -97.89﻿ (Lake Amon G. Carter (May 15, EF1)) | 2351 – 2358 | 3.63 mi (5.84 km) | 240 yd (220 m) | Five homes were damaged, one of which was destroyed, a golf course clubhouse was destroyed, and many trees were downed south of Lake Amon G. Carter. One person was injured. |
| EF1 | Southern Millsap | Parker | TX | 32°44′49″N 98°01′49″W﻿ / ﻿32.747°N 98.0302°W﻿ / 32.747; -98.0302﻿ (Millsap (May 15, EF1)) | 0003 – 0019 | 1.95 mi (3.14 km) | 400 yd (370 m) | Several homes and barns were damaged and power lines were downed. |
| EF0 | WSW of Illinois Bend | Montague | TX | 33°50′28″N 97°35′20″W﻿ / ﻿33.841°N 97.589°W﻿ / 33.841; -97.589﻿ (Illinois Bend (May 15, EF0)) | 0018 – 0020 | 0.94 mi (1.51 km) | 150 yd (140 m) | A brief tornado damaged a home and downed several trees northwest of St. Jo. |
| EF0 | E of Millsap | Parker | TX | 32°43′12″N 97°56′31″W﻿ / ﻿32.72°N 97.942°W﻿ / 32.72; -97.942﻿ (Brock (May 15, EF0)) | 0022 – 0025 | 0.49 mi (0.79 km) | 70 yd (64 m) | A brief tornado north of Brock remained over open fields and caused no damage. |
| EF0 | NNW of Bridgeport | Wise | TX | 33°24′29″N 97°40′19″W﻿ / ﻿33.408°N 97.6719°W﻿ / 33.408; -97.6719﻿ (Alvord (May 15, EF0)) | 0035 – 0037 | 0.69 mi (1.11 km) | 25 yd (23 m) | A brief tornado north of Alvord stayed mostly over open land and only downed a few trees. |
| EF0 | E of Dennis | Parker | TX | 32°38′20″N 97°48′22″W﻿ / ﻿32.639°N 97.806°W﻿ / 32.639; -97.806﻿ (Tin Top (May 15, EF0)) | 0053 – 0056 | 1.46 mi (2.35 km) | 200 yd (180 m) | Numerous barns and mobile homes were damaged or destroyed and numerous trees were downed south of Weatherford and southwest of Annetta. |
| EF4 | Southeastern Granbury | Hood | TX | 32°24′43″N 97°45′14″W﻿ / ﻿32.412°N 97.754°W﻿ / 32.412; -97.754﻿ (Granbury (May 15, EF4)) | 0058 – 0111 | 2.5 mi (4.0 km) | 400 yd (370 m) | 6 deaths – See article on this tornado – This large, slow-moving, violent tornado touched down on the west bank of the Brazos River, crossing the river and moving eastward, before downing several trees and power lines and hitting the American Legion hall. The tornado then abruptly turned northward and entered the Rancho Brazos subdivision, reaching peak intensity. Here, 97 of the 110 homes were damaged. While the vast majority of the subdivision sustained EF1 or EF2 damage, 10 homes sustained EF3 damage, and 4 homes sustained EF4 damage. All 6 deaths were in mobile homes. The tornado then continued north for one mile before dissipating. In addition to the fatalities, 54 people were injured. |
| EF0 | SSW of Aledo | Parker | TX | 32°33′58″N 97°40′30″W﻿ / ﻿32.566°N 97.675°W﻿ / 32.566; -97.675﻿ (Annetta South (May 15, EF0)) | 0105 – 0107 | 0.12 mi (0.19 km) | 25 yd (23 m) | A brief tornado caused no known damage. |
| EF1 | Pecan Plantation | Hood, Johnson | TX | 32°21′22″N 97°37′59″W﻿ / ﻿32.356°N 97.633°W﻿ / 32.356; -97.633﻿ (Pecan Plantation (May 15, EF1)) | 0109 – 0121 | 2.44 mi (3.93 km) | 300 yd (270 m) | This tornado produced mostly minor damage in the Pecan Plantation community before crossing the Brazos River and dissipating. |
| EF0 | NW of Cresson | Johnson | TX | 32°33′18″N 97°39′50″W﻿ / ﻿32.555°N 97.664°W﻿ / 32.555; -97.664﻿ (Cresson (May 15, EF0)) | 0119 – 0122 | 0.19 mi (0.31 km) | 30 yd (27 m) | A brief tornado damaged a billboard and a few farm buildings. |
| EF0 | NNE of Evant (1st tornado) | Hamilton | TX | 31°30′43″N 98°08′06″W﻿ / ﻿31.512°N 98.135°W﻿ / 31.512; -98.135﻿ (Pottsville (May 15, EF0)) | 0134 – 0136 | 0.21 mi (0.34 km) | 30 yd (27 m) | This was the first of two brief tornadoes that occurred simultaneously, although no damage was reported. |
| EF0 | NNE of Evant (2nd tornado) | Hamilton | TX | 31°30′07″N 98°08′42″W﻿ / ﻿31.502°N 98.145°W﻿ / 31.502; -98.145﻿ (Pottsville (May 15, EF0)) | 0135 – 0137 | 1.04 mi (1.67 km) | 40 yd (37 m) | This was the second of two brief tornadoes that occurred simultaneously, although no damage was reported. |
| EF3 | SSW of Cleburne | Johnson | TX | 32°15′18″N 97°29′42″W﻿ / ﻿32.255°N 97.495°W﻿ / 32.255; -97.495﻿ (Cleburne (May 15, EF3)) | 0212 – 0223 | 7.79 mi (12.54 km) | 1,733 yd (1,585 m) | A large wedge tornado formed near Lake Pat Cleburne and moved erratically northeastward, damaging dozens of homes, four of which sustained EF3-strength damage. Seven people were injured. |
| EF0 | ESE of Cleburne | Johnson | TX | 32°18′40″N 97°17′49″W﻿ / ﻿32.311°N 97.297°W﻿ / 32.311; -97.297﻿ (Cleburne (May 15, EF0)) | 0245 – 0249 | 1.28 mi (2.06 km) | 400 yd (370 m) | Five manufactured homes suffered roof damage and several trees were downed. |

### May 16 event

List of confirmed tornadoes – Thursday, May 16, 2013 :
| EF# | Location | County / Parish | State | Start Coord. | Time (UTC) | Path length | Max width | Summary |
| EF1 | Ennis | Ellis | TX | 32°19′30″N 96°37′52″W﻿ / ﻿32.325°N 96.631°W﻿ / 32.325; -96.631﻿ (Ennis (May 16, EF1)) | 0505 – 0512 | 6.17 mi (9.93 km) | 400 yd (370 m) | A total of 17 homes were damaged, with 4 being destroyed. Another 55 commercial properties were damaged, with 20 suffering severe damage. One person was injured. |
| EF1 | W of Waskom | Harrison | TX | 32°29′28″N 94°09′12″W﻿ / ﻿32.4911°N 94.1534°W﻿ / 32.4911; -94.1534﻿ (Waskom (May 16, EF1)) | 1920 – 1924 | 1.43 mi (2.30 km) | 500 yd (460 m) | Several metal buildings were damaged and trees were downed. One person was injured. |
| EF1 | SSE of Waskom | Harrison | TX | 32°27′49″N 94°03′23″W﻿ / ﻿32.4636°N 94.0565°W﻿ / 32.4636; -94.0565﻿ (Waskom (May 16, EF1)) | 1934 – 1936 | 0.42 mi (0.68 km) | 200 yd (180 m) | A tornado caused minor damage to metal buildings, construction equipment, and a few houses. Several trees were downed as well. |
| EF1 | ESE of Greenwood | Caddo | LA | 32°26′48″N 93°57′45″W﻿ / ﻿32.4468°N 93.9625°W﻿ / 32.4468; -93.9625﻿ (Greenwood (May 16, EF1)) | 1939 – 1950 | 5.23 mi (8.42 km) | 1,400 yd (1,300 m) | Many trees were downed, several of which caused damage to mobile homes and site-built homes. One person was injured. |
| EF1 | NNE of Stonewall | Caddo, DeSoto | LA | 32°20′04″N 93°48′46″W﻿ / ﻿32.3345°N 93.8128°W﻿ / 32.3345; -93.8128﻿ (Stonewall (May 16, EF1)) | 2005 – 2009 | 2.48 mi (3.99 km) | 350 yd (320 m) | A brief tornado near a broad area of straight-line winds downed several trees. |

### May 17 event

List of confirmed tornadoes – Friday, May 17, 2013 :
| EF# | Location | County / Parish | State | Start Coord. | Time (UTC) | Path length | Max width | Summary |
| EF0 | S of Athens | Limestone | AL | 34°45′36″N 86°58′29″W﻿ / ﻿34.76°N 86.9748°W﻿ / 34.76; -86.9748﻿ (Athens (May 17, EF0)) | 1900 – 1907 | 2.04 mi (3.28 km) | 50 yd (46 m) | An intermittent tornado downed trees and shifted wooden front porch pillars at a house. It then skipped northeast, where it ripped metal signs and siding off of a metal pole before dissipating. |
| EF0 | SW of Ardmore | Limestone | AL | 34°57′17″N 86°52′46″W﻿ / ﻿34.9546°N 86.8794°W﻿ / 34.9546; -86.8794﻿ (Athens (May 17, EF0)) | 1945 – 1946 | 0.15 mi (0.24 km) | 50 yd (46 m) | A very brief tornado caused roof damage to several houses and a barn. One brick house sustained structural damage to its bricks and foundation and several trees were downed. |
| EF0 | N of Crawford | Dawes | NE | 42°46′53″N 103°24′00″W﻿ / ﻿42.7813°N 103.4°W﻿ / 42.7813; -103.4﻿ (Crawford (May 17, EF0)) | 2154 – 2200 | 2.67 mi (4.30 km) | 50 yd (46 m) | No damage was reported. |
| EF0 | WSW of Windom | Cottonwood | MN | 43°49′48″N 95°12′54″W﻿ / ﻿43.83°N 95.215°W﻿ / 43.83; -95.215﻿ (Windom (May 17, EF0)) | 2245 – 2247 | 0.5 mi (0.80 km) | 50 yd (46 m) | A brief tornado caused no damage. |
| EF0 | S of Miloma | Jackson | MN | 43°43′12″N 95°10′30″W﻿ / ﻿43.72°N 95.175°W﻿ / 43.72; -95.175﻿ (Miloma (May 17, EF0)) | 2310 – 2312 | 0.5 mi (0.80 km) | 50 yd (46 m) | A brief tornado caused no damage. |
| EF0 | NW of Eliasville (1st tornado) | Young | TX | 32°59′N 98°49′W﻿ / ﻿32.99°N 98.81°W﻿ / 32.99; -98.81﻿ (Eliasville (May 17, EF0)) | 0034 – 0037 | 1.02 mi (1.64 km) | 75 yd (69 m) | A tornado occurred over open fields and caused no damage. |
| EF1 | NW of Eliasville (2nd tornado) | Young | TX | 32°59′56″N 98°47′02″W﻿ / ﻿32.999°N 98.784°W﻿ / 32.999; -98.784﻿ (Eliasville (May 17, EF1)) | 0050 – 0053 | 3.14 mi (5.05 km) | 20 yd (18 m) | A house suffered significant damage to its roof and back porch. |