Thunderstorms producing locally heavy rainfall over Webb County caused flash flooding on the northwest side of Laredo during the early morning hours of September 10th.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CRP wrote it up.
Thunderstorms producing locally heavy rainfall over Webb County caused flash flooding on the northwest side of Laredo during the early morning hours of September 10th.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Corpus Christi, TX wrote its last area forecast discussion before the first event at Sep 10, 12:01 AM CST, 2 hours 31 minutes earlier.
Area Forecast Discussion...UPDATED
National Weather Service Corpus Christi TX
101 AM CDT Mon Sep 10 2018
.DISCUSSION...See Aviation section for 06Z TAFs.
&&
.AVIATION...Deep tropical moisture will remain over the region
through the period. Convection is expected to increase over the
Brush Country in proximity to weak low to mid level low along
the Rio Grande south of Laredo and assistance from weak low level
convergence over this area. Scattered convection will also
continue along the coast in a region of convergence along the
coast. IFR ceilings/vsbys are expected over LRD area overnight
while MVFR conditions will occur over the coastal plains with
IFR vsbys possible in stronger showers/storms. Activity could
wane over the Brush Country by the afternoon while focus shifts
toward the coastal plains. Will maintain MVFR ceilings as
prevailing through the rest of the period. Uncertain if the
convection will diminish some by late afternoon into the evening
as some of the models depict. Will keep VCSH in the latter part of
the forecast at this point.
&&
.PRELIMINARY POINT TEMPS/POPS...
Corpus Christi 74 87 75 90 75 / 70 60 50 50 30
Victoria 71 87 72 89 73 / 70 70 40 50 30
Laredo 74 89 74 93 75 / 60 40 20 30 20
Alice 71 87 72 91 73 / 70 60 40 40 30
Rockport 75 87 77 89 77 / 70 60 50 50 30
Cotulla 71 87 72 90 73 / 50 40 20 30 20
Kingsville 74 88 74 91 74 / 70 60 50 40 30
Navy Corpus 79 88 78 90 78 / 70 60 50 50 30
&&
.CRP WATCHES/WARNINGS/ADVISORIES...
TX...Flash Flood Watch until 10 AM CDT this morning For the following
zones: Duval...La Salle...McMullen...Webb.
GM...None.
&&
TMT/89...AVIATIONHazardous Weather Outlook...UPDATED National Weather Service Corpus Christi TX 701 PM CDT Sun Sep 9 2018 TXZ229>234-239>247-342>347-442-443-447-110015- La Salle-McMullen-Live Oak-Bee-Goliad-Victoria-Webb-Duval- Jim Wells-Inland Kleberg-Inland Nueces-Inland San Patricio- Coastal Aransas-Inland Refugio-Inland Calhoun-Coastal Kleberg- Coastal Nueces-Coastal San Patricio-Aransas Islands- Coastal Refugio-Coastal Calhoun-Kleberg Islands-Nueces Islands- Calhoun Islands- 701 PM CDT Sun Sep 9 2018 This hazardous weather outlook is for South Texas. .DAY ONE...Tonight A Flash Flood Watch is in effect for Webb, La Salle, McMullen and Duval counties tonight. Numerous to widespread showers and thunderstorms producing moderate to heavy rainfall can be expected across South Texas tonight. .DAYS TWO THROUGH SEVEN...Monday through Saturday A Flash Flood Watch will continue in effect through Monday morning for Webb, La Salle, McMullen and Duval counties. Numerous to widespread showers and thunderstorms are expected across South Texas Monday, with additional shower and thunderstorms through much of the upcoming week. Some storms may produce heavy rainfall, dangerous lightning, and wind gusts up to 40 mph. Severe thunderstorms are not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. GMZ230-235-250-255-270-275-110015- Bays and Waterways from Baffin Bay to Port Aransas- Bays and Waterways from Port Aransas to Port O'Connor- Coastal waters from Baffin Bay to Port Aransas out 20 NM- Coastal waters from Port Aransas to Matagorda Ship Channel out 20 NM-Waters from Baffin Bay to Port Aransas from 20 to 60 NM- Waters from Port Aransas to Matagorda Ship Channel from 20 to 60 NM- 701 PM CDT Sun Sep 9 2018 This hazardous weather outlook is for the Middle Texas Coastal Waters. .DAY ONE...Tonight Scattered to numerous showers and thunderstorms producing moderate to heavy rainfall can be expected across the Middle Texas Coastal Waters tonight. .DAYS TWO THROUGH SEVEN...Monday through Saturday Numerous to widespread showers and thunderstorms are expected across the Middle Texas Coastal Waters Monday, with additional shower and thunderstorms through much of the upcoming week. Some storms may produce heavy rainfall, dangerous lightning, and wind gusts up to 40 mph. Severe thunderstorms are not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. ANM
The Corpus Christi radar (KCRP), 197 km away, was scanning. The volume nearest the first event began at 08:30 UTC.
1 flash flood. Local standard time, as filed.
Water rescues were performed in northwest Laredo due to flooding near Mines Road|and Las Cruces Drive intersection.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2018Every state in 2018This day in weather historyWarnings in Texas, September 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 787551.