Severe thunderstorm moved through Corpus Christi around midnight with gusts to 60 mph occurring at the Corpus Christi Naval Air Station.
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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.
Severe thunderstorm moved through Corpus Christi around midnight with gusts to 60 mph occurring at the Corpus Christi Naval Air Station.
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 May 11, 11:51 PM CST, 5 minutes earlier.
Area Forecast Discussion National Weather Service Corpus Christi TX 1251 AM CDT Wed May 12 2021 .DISCUSSION... See 06z TAF discussion below. && .AVIATION... Line of convection was draped from near Rio Grande City to just off the coast near Port Aransas. This line will continue moving southeast and away from the area, however gusty winds will continue for the next few hours as outflow moves away from the precipitation. Expect additional showers to develop in the wake of this main line as a cold front settles into the region and overrunning precipitation commences. The front will reach the coast by 12z with winds becoming more northerly. IFR Ceilings and light rain will persist through 18z today...gradually lifting to MVFR in the afternoon. Precipitation should end by 00z today with MVFR overcast conditions expected through the end of the period. && .PREV DISCUSSION... /Issued 738 PM CDT Tue May 11 2021/ DISCUSSION... Have adjusted the pops up to categorical for this evening to better match the ongoing convection. Otherwise, the rest of the forecast looks on track. Convection is still expected to decrease as it shifts east and southeast overnight into Wed morning Lingering showers will remain possible Wed afternoon. PREV DISCUSSION... /Issued 639 PM CDT Tue May 11 2021/ AVIATION... Scattered to numerous thunderstorms can be expected through the overnight hours as a slow moving cold front moves into S TX. This will lead to CIGs and VSBYs varying between LIFR and MVFR conditions tonight through Wed morning. S TX is under a Severe Thunderstorm Watch with several warnings already in effect. Thunderstorm activity is expected to decrease from west to southeast through Wed morning with lingering showers through early Wed afternoon. However, models indicate CIGs to continue between IFR and MVFR levels through much of the day Wed. Strong gusty winds can be expected with the stronger storms. A weak to moderate north wind will develop behind the cold front by early Wed morning. PREV DISCUSSION... /Issued 419 PM CDT Tue May 11 2021/ SHORT TERM (Tonight through Wednesday Night)... Severe convection anticipated this evening over at least the western portions of South Texas, owing to conditions favorable for supercells/very large hail. Severe Thunderstorm Watch currently in effect until 03z Wednesday. The deterministic runs predict a weak upper level disturbance to move eastward across the SRN Plains/TX during the period and contribute to the slow movement of the front across the CWA, generally 06z-16z Wednesday. The combination of copious moisture and the slow moving front will likely contribute to the transition from a severe to a heavy rainfall event overnight. After coordinating with surrounding WFOs, will not issue a FFA for tonight. Based on RAP/NAM output, conditions will not be ideal for efficient rainfall production overnight, since these models maintain strong vertical shear, large CAPE (although weaker than this evening), and only a limited time period whereby a nearly saturated and warm 0-4km layer will exist. After frontal passage Wednesday, expect cloudy/cooler conditions, with elevated convection possible. Lowered maximum temperatures Wednesday below NBM/SREF mean given expectation of limited solar radiation. Drier Wednesday night. Ekman forcing associated with persistent moderate northeast flow Wednesday night may increase the risk of minor coastal flooding at Bob Hall Pier 11-12z Thursday, near the time of high tide. LONG TERM (Thursday through Tuesday)... Rain chances will come to an end from north to south by Thursday afternoon, as high pressure settles in the wake of the cold front. Drier and cooler conditions are expected to persist through Friday as ridging also dominates aloft. Northeast winds will veer east and then southeast Friday night as the surface high pressure transitions eastward. The return flow will allow for a steady increase in moisture across the region early in the weekend with PWATs rising to around 2 inches or more by Saturday afternoon. This, in addition to several passing disturbances ejecting into the area from the mid- levels, warmer temperatures, higher instability and little to none convective inhibition may potentially provide the setting for another round of showers and thunderstorms Saturday and Sunday. Given this setting pans out, some of these storms could become strong to severe at times over the weekend. Rain and storm chances are likely to linger into early next week ahead of the next upper low/trough moving from the Four Corners region into the Central Plains. Cooler and below normal temperatures can be expected Thursday through Friday, followed by a warming trend over the weekend into early next week. Highs will range from the upper 70s to near 80 on Thursday to the mid 80s to upper 90s by Monday. Lows will be in the 60s Thursday night, warming into the 70s over the weekend. MARINE... Severe convection possible this evening/early tonight, followed by a transition to a heavy rainfall event after 06z Wednesday in advance of/near an approaching front. The front is expected to move across the Waters Wednesday afternoon. Drier conditions expected Wednesday night. The combination of increasing MSLP over the NW Gulf of Mexico, and surface low pressure over the Bay of Campeche, anticipate moderate northeast flow by Wednesday night. Rain chances will diminish on Thursday. Moderate northeast flow behind the front will continue Thursday through Friday. Onshore flow and increasing moisture beginning Friday night will combine with a series of upper level disturbances to generate isolated to scattered showers and thunderstorms Saturday and Sunday. Intermittent periods of Small Craft Exercise Caution or Advisory conditions will be possible Thursday through Sunday. && .PRELIMINARY POINT TEMPS/POPS... Corpus Christi 76 66 79 66 80 / 70 10 10 0 10 Victoria 74 63 77 61 81 / 50 10 10 0 0 Laredo 74 65 81 66 85 / 60 20 20 10 10 Alice 75 64 81 64 84 / 60 10 10 0 10 Rockport 76 66 80 68 82 / 70 10 10 0 10 Cotulla 73 64 82 65 87 / 50 10 10 0 10 Kingsville 76 65 79 65 82 / 70 10 10 0 10 Navy Corpus 76 69 78 69 79 / 70 20 10 0 10 && .CRP WATCHES/WARNINGS/ADVISORIES... TX...None. GM...None. && JM/75...AVIATION
Hazardous Weather Outlook National Weather Service Corpus Christi TX 1120 PM CDT Tue May 11 2021 TXZ229>234-239>247-342>347-442-443-447-130430- 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- 1120 PM CDT Tue May 11 2021 This hazardous weather outlook is for South Texas. .DAY ONE...Tonight A Severe Thunderstorm Watch is in effect until 4 am for Jim Wells, San Patricio, Nueces, and Kleberg counties. Scattered to numerous showers and thunderstorms across South Texas Tonight. A few storms could be severe with large hail and damaging winds. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Scattered to numerous showers and thunderstorms are expected across most of South Texas tonight and Wednesday. A few storms could be severe along with a threat of heavy rainfall. Scattered showers and thunderstorms will be possible Saturday and Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. GMZ230-235-250-255-270-275-130430- 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- 1120 PM CDT Tue May 11 2021 This hazardous weather outlook is for the Middle Texas Coastal Waters. .DAY ONE...Tonight A Severe Thunderstorm Watch is in effect until 4 am for the southern Bays and nearshore waters. Scattered to numerous thunderstorms expected late tonight and into Wednesday morning. Wind gusts to 40 knots or higher are possible along with hail and dangerous lightning. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Scattered to numerous showers and thunderstorms are expected through Wednesday. A few storms could be severe with gusty winds, hail and a waterspout possible. Scattered showers and thunderstorms will be possible Saturday and Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
Special Weather Statement
National Weather Service Corpus Christi TX
1115 PM CDT Tue May 11 2021
TXZ242-342-120500-
Coastal Kleberg-Inland Kleberg-
1115 PM CDT Tue May 11 2021
...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT KLEBERG COUNTY...
At 1114 PM CDT, strong thunderstorms were located near Ricardo, or
near Kingsville, moving southeast at 20 mph.
Locations impacted include...
Kingsville, Riviera Beach, Riviera, Ricardo, Kingsville Naval Air
Station and Loyola Beach.
This includes US Highway 77 between mile markers 688 and 708.
LAT...LON 2722 9799 2726 9799 2726 9804 2758 9801
2753 9749 2723 9753 2724 9763 2728 9765
2726 9773 2728 9776 2727 9777 2728 9778
2727 9781 2725 9783 2724 9788 2724 9792
2723 9795 2722 9796
TIME...MOT...LOC 0414Z 302DEG 18KT 2744 9780
PHSpecial Weather Statement National Weather Service Corpus Christi TX 1214 AM CDT Wed May 12 2021 TXZ244-344-120545- Inland San Patricio-Coastal San Patricio- 1214 AM CDT Wed May 12 2021 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN SAN PATRICIO COUNTY... At 1214 AM CDT, a strong thunderstorm was located over Portland, moving east at 20 mph. Winds in excess of 30 mph are possible with this storm. Locations impacted include... Portland, Ingleside and Gregory. This includes US Highway 181 between mile markers 634 and 644. If outdoors, consider seeking shelter inside a building. LAT...LON 2789 9743 2795 9739 2795 9718 2780 9728 TIME...MOT...LOC 0514Z 279DEG 19KT 2788 9736 PH
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1230 AM CDT WED MAY 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1122 PM MARINE TSTM WIND 3 ESE KINGSVILLE 27.50N 97.82W
05/11/2021 M46 MPH KLEBERG TX AWOS
NAS KINGSVILLE ASOS MEASURED A GUST TO 40
KNOTS.
&&
TCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1247 AM CDT WED MAY 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1230 AM MARINE TSTM WIND 1 ESE CC NAS 27.68N 97.27W
05/12/2021 M44 MPH NUECES TX ASOS
NAS CORPUS CHRISTI ASOS MEASURED A GUST TO
38 KNOTS.
&&
TCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1250 AM CDT WED MAY 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1210 AM MARINE TSTM WIND 1 E CORPUS CHRISTI 27.80N 97.39W
05/12/2021 M41 MPH NUECES TX MESONET
PEOPLES STREET T-HEAD WEATHERFLOW SITE
MEASURED A GUST TO 36 KNOTS.
&&
TCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1254 AM CDT WED MAY 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1238 AM MARINE TSTM WIND 2 SE FLOUR BLUFF 27.64N 97.29W
05/12/2021 M43 MPH NUECES TX MESONET
LAGUNA SHORES WEATHERFLOW SITE XLAG MEASURED
A GUST UP TO 37 KNOTS.
&&
TCThe Corpus Christi radar (KCRP), 24 km away, was scanning. The volume nearest the first event began at 05:56 UTC.
1 thunderstorm wind. Local standard time, as filed.
Corpus Christi Naval Air Station AWOS measured a gust to 61 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2021Every state in 2021This day in weather historyWarnings in Texas, May 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: 960091.