A weak landspout tornado occurred near Sinton during the afternoon.
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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.
A weak landspout tornado occurred near Sinton during the afternoon.
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 Jul 20, 3:00 PM CST, 1 hour earlier.
Area Forecast Discussion National Weather Service Corpus Christi TX 400 PM CDT Tue Jul 20 2021 .SHORT TERM (Tonight through Wednesday Night)... Deterministic runs move the axis of the upper trough/low slowly westward across the CWA during the period. Most recent GOES-16 derived PWAT values 1.5-1.7 inches over the northern half of the CWA area, and 1.8-2.0 south, which is somewhat consistent with the weak E-W boundary across the CWA per MSAS. The NAM/GFS predicts PWAT values approximately 1.5-1.7 inches areawide tonight as the weak boundary moves slowly southward. However, greater PWAT values are expected to return Wednesday afternoon while the boundary moves northward/dissipates. Thus, Tonight, anticipate isolated convection overnight over the CWA owing to the upper trough/weak surface boundary. Expect scattered activity over the adjacent Waters owing to greater moisture. Wednesday, scattered convection anticipated owing to the upper trough/low and increasing moisture. Wednesday night, although the boundary will likely be non- existent, greater moisture over the CWA and the upper trough may result in isolated convection. Maximum Heat Index values Wednesday around 100F. && .LONG TERM (Thursday through Tuesday)... The mid-upper level low will continue a westward progression Thursday with high pressure moving in from the east. As the low moves off to the west a jet streak will form with South Texas located near the right entrance region. This diffluence aloft, combined with areas of positive vorticity aloft and PWAT's near or above 2.0", will allow for the development of scattered showers and thunderstorms. This development will be focused over the eastern portion of the CWA during the morning hours on Thursday and over the Brush Country and west during the afternoon hours. Expect dry conditions to develop Friday and persist through the weekend as high pressure builds in from the east and PWATs decrease. Temperatures will warm Friday into the weekend. Highs will be in the 90s for most of the area. Areas in and west of Brush Country will see highs in or near the triple digits. As for next week, models bring a TUTT low into Deep South Texas with an inverted trough axis over the Texas Coast early next week. Latest model guidance still keeps moisture and low-level support at a minimum as the low progresses northwestward through the state, so have kept silent PoPs through the middle of next week. With the temperatures trending warmer, heat indices of 105-109 will be possible each day, especially over the inland Coastal Plains and western CWA. Also worth mentioning, the astronomical tides will peak this weekend with a full moon occurring Friday. P-ETSS guidance indicates water levels will reach to around 1.5 MSL during times of high tide Thursday through the weekend. Wave periods are expected to remain below 8 seconds; however, with persistent onshore flow, could see some higher water levels, so will need to continue to monitor. && .MARINE... The combination of an upper level trough/low, weak boundary, and significant moisture will contribute to isolated/scattered convection tonight/Wednesday. Greater moisture/uppper system will contribute to additional isolated convection Wednesday night. A weak to moderate onshore flow is expected Thursday, and will increase to moderate to occasionally strong levels Thursday night and into the weekend. Scattered to occasionally numerous showers and thunderstorms will continue Thursday. Rain chances diminish by Friday with little to no rain expected through the weekend. && .PRELIMINARY POINT TEMPS/POPS... Corpus Christi 75 91 77 92 79 / 30 30 30 40 10 Victoria 73 90 74 91 77 / 20 40 20 50 10 Laredo 75 94 76 96 78 / 20 40 20 40 10 Alice 73 94 75 93 76 / 20 40 20 40 10 Rockport 77 89 79 91 83 / 30 30 30 40 10 Cotulla 75 94 76 94 77 / 20 30 20 50 20 Kingsville 74 92 76 92 77 / 20 40 30 40 10 Navy Corpus 78 89 80 91 83 / 40 40 30 40 10 && .CRP WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && WC/87...SHORT TERM HAA/72...LONG TERM
Hazardous Weather Outlook National Weather Service Corpus Christi TX 402 AM CDT Tue Jul 20 2021 TXZ229>234-239>247-342>347-442-443-447-210915- 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- 402 AM CDT Tue Jul 20 2021 This hazardous weather outlook is for South Texas. .DAY ONE...Today and Tonight Scattered thunderstorms are expected across South Texas, some of which could produce locally heavy rain. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Scattered to numerous thunderstorms are expected Wednesday and Thursday. Locally heavy rainfall will be possible. Heat indices of 105 to 109 are possible Friday through Monday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. GMZ230-235-250-255-270-275-210915- 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- 402 AM CDT Tue Jul 20 2021 This hazardous weather outlook is for the Middle Texas Coastal Waters. .DAY ONE...Today and Tonight Scattered to numerous thunderstorms are possible. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Scattered to numerous thunderstorms are expected Wednesday and Thursday. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
The Corpus Christi radar (KCRP), 21 km away, was scanning. The volume nearest the first event began at 21:59 UTC.
1 tornado. Local standard time, as filed.
A brief landspout tornado was observed by a storm chase near Sinton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2021Every state in 2021This day in weather historyThe tornado archive for Texas, 2021Warnings in Texas, July 2021
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: 977099.