A tropical wave moved into South Texas on June 18th. A series of upper level disturbances interacted with this wave throughout its life cycle. This helped to maintain a broad area of low pressure at all levels of the atmosphere for the period from June 18th through June 20th across South Texas and the adjacent Gulf waters. Several boundaries and convergence along the coastline aided the production of heavy rainfall.
Most of the rain occurred between the early morning hours of June 19th through the morning of the 20th. Some of these storms produced rainfall rates as high as 5-6 inches per hour. Storm total rainfall amounts from Monday (June 18) morning through Thursday (June 21) morning were as high as 15 to 18 inches across southern and southeastern Jim Wells County, extreme northwest Kleberg County, isolated locations in Nueces County, central San Patricio County, Aransas County, and western Refugio County.
Even though most of South Texas was in a moderate to extreme drought before the heavy rains fell, flooding still occurred due to the intense rainfall rates which produced copious amounts of rainfall. Flooding of many streets, some with several feet of water, were quite common across many South Texas communities, generally east of Highway 281. Some of the hardest affected cities and towns were Alfred, Alice, Aransas Pass, Bonnie View, Corpus Christi, La Gloria, Odem, Orange Grove, Port Aransas, Premont, Rios, Rockport, Sinton, and Woodsboro. Several water rescues, especially in Corpus Christi, had to be performed due to the depth of the water stalling out vehicles.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 04:25:00 to 19-JUN-18 04:50:00 (CST-6)
Location: (ALI)ALICE INTL ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water levels on Lattas Creek caused flooding of Farm to Market Road 665 near Alice.

Flash Flood in REFUGIO, TEXAS
From 19-JUN-18 05:20:00 to 19-JUN-18 05:50:00 (CST-6)
Location: BONNIE VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding along Chocolate Swale and Sous Creek caused water to cover the roadways along Farm to Market Roads 629 and 1360 near Bonnie View and Farm to Market Road 1360 near Woodsboro.

Flash Flood in NUECES, TEXAS
From 19-JUN-18 05:57:00 to 19-JUN-18 06:22:00 (CST-6)
Location: GARDENDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant flooding of roadways occurred along Everhart Road near South Padre Island Drive.

Flash Flood in REFUGIO, TEXAS
From 19-JUN-18 06:20:00 to 19-JUN-18 08:10:00 (CST-6)
Location: BONNIE VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Many roads around Woodsboro were flooded. Highway 77 between Woodsboro and Refugio had water over the roadway. Farm to Market Road 1360 was flooded between Woodsboro and Bonnie View.

Flash Flood in REFUGIO, TEXAS
From 19-JUN-18 06:50:00 to 19-JUN-18 08:10:00 (CST-6)
Location: GRETA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portions of Highway 183 north of Refugio had water over the roadway.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 08:00:00 to 19-JUN-18 08:40:00 (CST-6)
Location: (ALI)ALICE INTL ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Manhole covers along several Alice streets came off due to excessive flooding. Numerous roads and intersections were closed in Alice. Portions of Business 281 were not passable.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 08:00:00 to 19-JUN-18 08:40:00 (CST-6)
Location: LA GLORIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

TXDOT closed Farm to Market Road 1538 northwest of La Gloria due to water flooding the road.

Flash Flood in NUECES, TEXAS
From 19-JUN-18 13:25:00 to 19-JUN-18 13:45:00 (CST-6)
Location: GARDENDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Yorktown and Saratoga Boulevards between Staples Street and Cimarron Boulevard in south Corpus Christi became impassable with water over a foot in depth in places.

Flash Flood in NUECES, TEXAS
From 19-JUN-18 13:30:00 to 19-JUN-18 13:55:00 (CST-6)
Location: GARDENDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Staples Street was flooded between Holly Road and Williams Drive in Corpus Christi. Flooding also occurred near Morgan Avenue and Crosstown Expressway.

Flash Flood in BEE, TEXAS
From 19-JUN-18 07:00:00 to 19-JUN-18 07:30:00 (CST-6)
Location: BEEVILLE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain to the northwest of Beeville in the watershed of Poesta Creek led to flooding in Beeville. Low lying areas along Poesta Creek were flooded with road closure barricades set up. Farm to Market Roads 673 and 351 were flooded. A few water rescues were conducted for people driving around barricades.

Flash Flood in DUVAL, TEXAS
From 19-JUN-18 08:34:00 to 19-JUN-18 08:56:00 (CST-6)
Location: RIOS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water flooded the road on Farm to Market Road 1329 near Rios.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 08:10:00 to 19-JUN-18 08:45:00 (CST-6)
Location: ALFRED
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Many roads from around Alfred to near Orange Grove were closed due to flooding.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 08:45:00 to 19-JUN-18 10:15:00 (CST-6)
Location: ALFRED
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant street and road flooding occurred around Orange Grove.

Flash Flood in NUECES, TEXAS
From 19-JUN-18 20:00:00 to 19-JUN-18 20:35:00 (CST-6)
Location: MIDWAY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several high water rescues occurred in Corpus Christi near Interstate 37 and Corn Products Road. Occupants were standing on the roofs of vehicles. Water rescues were also done near Antelope Street and near Brownlee Boulevard.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 09:45:00 to 19-JUN-18 10:30:00 (CST-6)
Location: PREMONT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Observer recorded 11 inches of rain. The heavy rainfall produced significant flooding of roads to the southwest of Premont.

Flood in NUECES, TEXAS
From 19-JUN-18 16:45:00 to 19-JUN-18 17:31:00 (CST-6)
Location: (CRP)CORPUS CHRISTI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor flooding of roadways continued over portions of Corpus Christi due to slow drainage of heavy rain. Flooding was reported on Leopard Street between Palm Drive and Port Avenue. Flooding occurred along Crosstown Expressway from Leopard to Agnes Streets. Flooding was reported at the intersection of South Padre Island Drive and Everhart Road.

Flash Flood in JIM WELLS, TEXAS
From 19-JUN-18 08:05:00 to 19-JUN-18 08:55:00 (CST-6)
Location: PREMONT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Officials closed many roads in Premont due to flooding.

Flash Flood in NUECES, TEXAS
From 20-JUN-18 06:50:00 to 20-JUN-18 09:15:00 (CST-6)
Location: PORT ARANSAS ARPT
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Social Media

Cars stalled in high water across Port Aransas with several water rescues performed. Avenue A and Alister Street was under 3 feet of water. Snapchat Live map showed significant street flooding. Water reached several homes in Port Aransas.

Flash Flood in SAN PATRICIO, TEXAS
From 19-JUN-18 21:25:00 to 19-JUN-18 22:30:00 (CST-6)
Location: SINTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding closed Highway 188 between Interstate 37 to Highway 77 in Sinton.

Flash Flood in SAN PATRICIO, TEXAS
From 19-JUN-18 21:25:00 to 19-JUN-18 22:30:00 (CST-6)
Location: ODEM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding caused multiple road closures near Odem. Farm to Market Road 234 was closed near intersections with County Roads 2015 and 2047.

Flash Flood in NUECES, TEXAS
From 19-JUN-18 21:56:00 to 19-JUN-18 22:36:00 (CST-6)
Location: HIGHWAY VLG
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Vehicles were stranded in water on Interstate 37 near Navigation Boulevard.

Flash Flood in JIM WELLS, TEXAS
From 20-JUN-18 02:15:00 to 20-JUN-18 03:15:00 (CST-6)
Location: ORANGE GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

County roads were flooded and closed around Orange Grove.

Flash Flood in NUECES, TEXAS
From 20-JUN-18 04:52:00 to 20-JUN-18 05:45:00 (CST-6)
Location: (CRP)CORPUS CHRISTI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Corpus Christi Police Department reported several roadways were flooded across the city.

Flash Flood in ARANSAS, TEXAS
From 20-JUN-18 06:23:00 to 20-JUN-18 06:53:00 (CST-6)
Location: ROCKPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roads from Market Street to Key Allegro were closed due to water over the road in Rockport.

Flash Flood in REFUGIO, TEXAS
From 20-JUN-18 09:10:00 to 20-JUN-18 09:40:00 (CST-6)
Location: BONNIE VIEW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water was over the road near Chocolate Swale and Farm to Market Road 136 southeast of Woodsboro.

Flood in NUECES, TEXAS
From 20-JUN-18 07:50:00 to 20-JUN-18 09:30:00 (CST-6)
Location: CALALLEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Flooding occurred under the overpass of the Nueces River near Labonte Park.

Flood in NUECES, TEXAS
From 20-JUN-18 10:00:00 to 20-JUN-18 11:00:00 (CST-6)
Location: BISHOP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Flood waters along San Fernando Creek covered County Road 101 near Farm to Market Road 70.

Flood in SAN PATRICIO, TEXAS
From 20-JUN-18 10:35:00 to 20-JUN-18 11:55:00 (CST-6)
Location: ARANSAS PASS
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Local Official

Flooding of roads occurred in Aransas Pass with some of the roads impassable. One business and one home were infiltrated by water.

Flood in JIM WELLS, TEXAS
From 20-JUN-18 16:00:00 to 20-JUN-18 19:00:00 (CST-6)
Location: LA GLORIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Road closure due to flooding occurred on County Road 406 near La Gloria.

Flash Flood in NUECES, TEXAS
From 18-JUN-18 23:32:00 to 19-JUN-18 00:32:00 (CST-6)
Location: (CRP)CORPUS CHRISTI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Parts of South Padre Island Drive and Crosstown Expressway were closed due to high water across the roadway.