Scattered thunderstorms developed over northeast Mexico during the afternoon of the 21st as an upper level disturbance moved across northern Mexico. An intense thunderstorm moved across the Rio Grande into the city of Laredo. Extensive wind damage occurred in the northern parts of Laredo from 80 to 95 mph wind gusts. Five homes were destroyed while around 50 single family and multi-family homes received major damage. Minor damage occurred to around 150 single family and multi-family homes. Major damage occurred to five businesses. Hail from golf ball to baseball size inflicted damage to roofs and cars across the city. After heavy rainfall with this storm, a second storm early in the evening produced heavy rainfall that led to flash flooding in the city.

Hail in WEBB, TEXAS
From 21-MAY-17 16:25:00 to 21-MAY-17 16:35:00 (CST-6)
Location: AGUILARES
Magnitude: 2.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported baseball sized hail near Highway 359 west of Aguilares.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 15:55:00 to 21-MAY-17 15:55:00 (CST-6)
Location: LAREDO
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Laredo International Airport AWOS measured a gust to 51 knots.

Hail in WEBB, TEXAS
From 21-MAY-17 15:48:00 to 21-MAY-17 15:50:00 (CST-6)
Location: LAREDO AFB
Magnitude: 1.50 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported half dollar sized hail in southeast Laredo.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 15:58:00 to 21-MAY-17 15:58:00 (CST-6)
Location: LAREDO AFB
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser estimated 60 mph wind gusts on the southeast side of Laredo.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 18:42:00 to 21-MAY-17 18:42:00 (CST-6)
Location: LAREDO AFB
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter estimated 70 mph winds 3 miles east of Laredo.

Flash Flood in WEBB, TEXAS
From 21-MAY-17 18:55:00 to 21-MAY-17 19:20:00 (CST-6)
Location: LAREDO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm spotter reported many roads were impassable across the city of Laredo.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 16:05:00 to 21-MAY-17 16:05:00 (CST-6)
Location: LAREDO AFB
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser estimated wind gusts to 70 mph.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 15:27:00 to 21-MAY-17 15:44:00 (CST-6)
Location: (LRD)LAREDO INTL ARP
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters reported street signs, brick fence posts, and power lines blown down across the northern part of Laredo.

Hail in WEBB, TEXAS
From 21-MAY-17 15:44:00 to 21-MAY-17 15:48:00 (CST-6)
Location: LAREDO LINK ARPT
Magnitude: 1.50 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Half dollar sized hail occurred in south central Laredo reported through social media.

Hail in WEBB, TEXAS
From 21-MAY-17 15:44:00 to 21-MAY-17 15:51:00 (CST-6)
Location: LAREDO AFB
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported golf ball sized hail on the east side of Laredo.

Flash Flood in WEBB, TEXAS
From 21-MAY-17 16:01:00 to 21-MAY-17 16:15:00 (CST-6)
Location: LAREDO
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

Cars were half submerged under water in parts of Laredo. Report was received through social media.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 15:56:00 to 21-MAY-17 16:03:00 (CST-6)
Location: LAKE CASA BLANCA
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser estimated wind gusts to 70 mph east of Laredo.

Hail in WEBB, TEXAS
From 21-MAY-17 16:04:00 to 21-MAY-17 16:07:00 (CST-6)
Location: LAREDO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Ham radio operator reported quarter sized hail at the Laredo International Airport.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 16:15:00 to 21-MAY-17 16:15:00 (CST-6)
Location: LAREDO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Fourteen year old boy was electrocuted after picking up a live power line that was downed in the storm.

Hail in WEBB, TEXAS
From 21-MAY-17 15:55:00 to 21-MAY-17 16:05:00 (CST-6)
Location: PESCADITO
Magnitude: 2.50 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported tennis ball sized hail east of Laredo.

Thunderstorm Wind in WEBB, TEXAS
From 21-MAY-17 15:28:00 to 21-MAY-17 15:44:00 (CST-6)
Location: (LRD)LAREDO INTL ARP
Magnitude: 83.00 EG
Property damage: 20.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

Damage survey in connection with a severe thunderstorm revealed straight-line wind damage along a line around 5 miles in length and 1 mile in width across northwest Laredo. The damage was from west of the intersection of Interstate 69W and Mines Road to the intersection of east Del Mar Boulevard and McPherson Road. Damage was widespread through this area with numerous large tree limbs snapped, shingle damage to homes, dozens of utility poles bent or broken. The most significant damage occurred at the U.S. Customs facility near World Trade Bridge #3 and to homes in the Villas San Agustin neighborhood. At the U.S. Customs facility, several tractor trailers were overturned, and extensive damage occurred to the metal roof of this facility with several air conditioners blown off. Wind gusts were estimated to be between 80 and 95 mph. The World Trade Bridge was closed to commercial cargo traffic for nearly a week. Within the Villas San Agustin subdivision, 4 new homes that were under construction, slid off their foundations and collapsed. Debris from these properties impacted several nearby homes causing extensive damage. Numerous homes in this subdivision lost shingles. Laredo Fire Station #9, located near Interstate 69 and Mines Road, lost its metal roof. Farther southeast, in the Dominion Del Mar, Terra Hills, and Northview subdivisions, numerous large tree limbs were broken, utility poles were bent or broken and a cement wall under construction at the Laredo Fire Department was toppled.