An upper level trough of low pressure moved across western Texas and northern Mexico producing supercell thunderstorms which moved off the Serranias del Burro mountains and into Val Verde county.
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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 EWX wrote it up.
An upper level trough of low pressure moved across western Texas and northern Mexico producing supercell thunderstorms which moved off the Serranias del Burro mountains and into Val Verde county.
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 Austin/San Antonio, TX wrote its last area forecast discussion before the first event at May 16, 5:55 AM CST, 43 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 655 AM CDT SUN MAY 16 2010 .AVIATION... CURRENTLY SEEING VFR CIGS ACROSS THE REGION AND EXPECT THAT TO CONTINUE. SCATTERED SHRA/TSRA WILL CONTINUE ACROSS THE WEST THROUGH 16Z. WITH DISTURBANCES EXPECTED TO CROSS THE REGION FROM WEST TO EAST TODAY AND TONIGHT ADDITIONAL SHRA/TSRA WILL DEVELOP OVER THE REMAINDER OF THE AREA THROUGH 04Z. WINDS ARE CALM TO LIGHT EAST AND EXPECT THIS TO CONTINUE. AFTER 15Z KDRT WILL SEE SE WIND 10 TO 15 KTS AND I-35 SITES WILL HAVE AN E/SE WIND 5 TO 10 KTS. CIGS WILL BECOME MVFR AFTER 06Z TONIGHT AND CONTINUE THROUGH 14-16Z MON. IF SHRA/TSRA IMPACT TERMINAL SITES WILL SEE LOW MVFR AND BRIEF IFR CONDITIONS. && .PREV DISCUSSION... /ISSUED 406 AM CDT SUN MAY 16 2010/ DISCUSSION... AN UPPER LEVEL TROUGH MOVING EAST ACROSS WESTERN TEXAS AND A SURFACE BOUNDARY FROM THE DAVIS MOUNTAINS TO THE HILL COUNTRY IS GENERATING SOME SHOWERS AND THUNDERSTORMS FROM THE BIG BEND TO THE EDWARDS PLATEAU TO THE SERRANIAS DEL BURRO MOUNTAINS OF MEXICO. THE UPPER LEVEL TROUGH WILL MOVE ACROSS TEXAS TODAY WHILE SURFACE BOUNDARY REMAINS QUASISTATIONARY. HAVE KEPT CHANCE POPS FOR TODAY. CONVECTIVE PARAMETERS SHOW SOME STORMS MAY BE STRONG TO SEVERE. LOCALLY HEAVY DOWNPOURS ARE ALSO POSSIBLE. MODELS STILL CONTINUE THEIR LACK OF CONSENSUS WITH SOME SHOWING A LACK OF CONSISTENCY FOR THE UPCOMING WEEK. FAVOR THE WETTER ECMWF BASED ON LAST FEW DAYS. A COUPLE OF UPPER LEVEL SHORT-WAVES WILL MOVE ACROSS THE SOUTHERN TIER OF STATES, THE FIRST LATE MONDAY INTO TUESDAY AND THE OTHER THURSDAY INTO EARLY FRIDAY. SURFACE BOUNDARIES MAY PERSIST FROM THE PREVIOUS DAYS CONVECTION. WILL KEEP MAINLY SLIGHT CHANCE POPS MONDAY THROUGH FRIDAY, EXCEPT FOR CHANCE POPS MONDAY NIGHT OUT WEST WHERE BETTER LIFT AND MOISTURE WILL DEVELOP. SOME STORMS MAY BECOME STRONG TO SEVERE, ESPECIALLY OUT WEST. GUIDANCE TEMPERATURES AND HPC QPF SEEM REASONABLE WITH ONLY A FEW MINOR ADJUSTMENTS. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 68 93 68 90 70 / 20 20 20 20 20 AUSTIN BERGSTROM INTL AIRPORT 65 91 66 89 68 / 20 20 20 20 20 NEW BRAUNFELS MUNI AIRPORT 67 92 67 91 69 / 20 20 20 20 20 BURNET MUNI AIRPORT 66 88 67 88 68 / 20 20 20 20 20 DEL RIO INTL AIRPORT 72 89 71 89 71 / 20 20 40 20 20 GEORGETOWN MUNI AIRPORT 65 88 67 88 68 / 20 20 20 20 20 HONDO MUNI AIRPORT 68 91 69 90 69 / 20 20 30 20 20 SAN MARCOS MUNI AIRPORT 67 91 68 90 69 / 20 20 20 20 20 LA GRANGE - FAYETTE REGIONAL 67 90 68 88 69 / 20 20 20 30 20 SAN ANTONIO INTL AIRPORT 69 90 70 90 70 / 20 20 20 20 20 STINSON MUNI AIRPORT 69 91 70 91 69 / 20 20 20 20 20 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 04/10/PM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 503 AM CDT SUN MAY 16 2010 TXZ171>173-183>194-202>209-217>225-228-171100- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE- MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA- FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT- 503 AM CDT SUN MAY 16 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED AS UPPER LEVEL DISTURBANCES MOVE ACROSS THE REGION THROUGH TONIGHT. A FEW OF THE STORMS COULD BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREAT. LOCALLY HEAVY RAINFALL WILL BE THE GREATEST THREAT FROM THUNDERSTORMS TODAY AND TONIGHT. THIS RAINFALL OVER ALREADY SATURATED GROUND MAY CAUSE LOCALIZED FLOODING OF CREEKS... STREAMS...POOR DRAINAGE AREAS AND LOW WATER CROSSINGS. ISOLATED RAINFALL AMOUNTS OF 3 TO 5 INCHES ARE POSSIBLE THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... A DRIER PATTERN WILL DEVELOP AND CONTINUE THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED TODAY THROUGH TONIGHT.
The Laughlin AFB radar (KDFX), 119 km away, was scanning. The volume nearest the first event began at 12:38 UTC.
3 flash flood, 2 thunderstorm wind. Local standard time, as filed.
Thunderstorms produced heavy rain which flooded and closed several low water crossings.
Thunderstorms produced heavy rain which flooded low water crossings south of Juno.
A thunderstorm produced an estimated wind gust of 60 mph which overturned a boat on Lake Amistad near Tank Canyon.
A thunderstorm produced a measured wind gust of 53 kts on the Laughlin AFB ASOS.
Thunderstorms produced heavy rain which flooded and closed several roads in Del Rio including 10th Street, 13th Street, and Fox Drive.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2010Every state in 2010This day in weather historyWarnings in Texas, May 2010
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: 227024, 227025, 227031, 227034, 227050.