A weak upper level trough of low pressure moved across the tail end of the dryline and initiated thunderstorms over the Serranias del Burro Mountains in Mexico. One of these storms entered Val Verde County and produced severe wind gusts.
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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.
A weak upper level trough of low pressure moved across the tail end of the dryline and initiated thunderstorms over the Serranias del Burro Mountains in Mexico. One of these storms entered Val Verde County and produced severe wind gusts.
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 8, 5:15 PM CST, 1 hour 25 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 615 PM CDT SUN MAY 8 2011 .AVIATION... VFR CONDITIONS WILL CONTINUE THROUGH THE EVENING HOURS. AN OF SHOWERS AND THUNDERSTORMS IN MEXICO IS DRIFTING SLOWLY TOWARD THE DEL RIO AREA. THESE STORMS ARE DISSIPATING AS THEY APPROACH THE RIVER AND DO NOT THINK ANY WILL MAKE IT TO DRT. THEY HAVE PRODUCED A HIGH OVC DECK WHICH WILL LINGER THROUGH THE EVENING. THE SOUTHEASTERLY FLOW WILL BRING MVFR CIGS BACK TO THE REGION AROUND 05Z OR 06Z IN AUSTIN AND SAN ANTONIO. LOW CLOUDS WILL GET TO DRT BY 13Z. CLEARING TO VFR LATE MORNING MON. WINDS MON AFTERNOON WILL BE AROUND 15KTS WITH GUSTS IN THE MIDDLE 20S. && .PREV DISCUSSION... /ISSUED 603 PM CDT SUN MAY 8 2011/ UPDATE... HAVE UPDATED TO MENTION ISOLATED THUNDERSTORMS FOR AREAS ALONG THE RIO GRANDE. LEFT MOVING STORM VECTORS TAKE THEM INTO VAL VERDE COUNTY WHILE RIGHT MOVING STORM VECTORS TAKE THEM TO RIVER NEAR KINNEY AND MAVERICK COUNTIES. HAVE ALSO BOOSTED WINDS FOR THIS EVENING INTO THE EARLY OVERNIGHT HOURS. REMAINDER OF SOUTH CENTRAL TEXAS FORECAST IS ON TRACK. PREV DISCUSSION... /ISSUED 309 PM CDT SUN MAY 8 2011/ DISCUSSION... THE UPPER RIDGE WILL GRADUALLY SLIDE EAST OVER THE NEXT COUPLE DAYS AS AN UPPER LOW DROPS INTO THE GREAT BASIN REGION. THE RESULTING SWLY FLOW ALOFT SHOULD RESULT IN INCREASED CIRRUS CLOUDS ACROSS THE REGION ALONG WITH THE DRY LINE NUDGING INTO THE WESTERN CWA IN THE LATE AFTERNOON/EARLY EVENING HOURS. WILL REMOVE THE ISOLATED STORMS ACROSS THE FAR WEST FOR THIS EVENING...AND KEEP MENTION OF ISOLATED STORMS IN FOR THE WESTERN COUNTIES MONDAY EVENING WITH THE DRY LINE. MAX TEMPERATURES SHOULD ALSO LOWER A FEW DEGREES OVER THE NEXT COUPLE DAYS DUE TO THE INCREASED HIGH CLOUDS. A SHORT WAVE LIFTING OUT ACROSS THE BIG BEND REGION INTO SW TX TUESDAY AFTERNOON/EVENING DURING MAX HEATING WILL RESULT IN MORE ORGANIZED STRONG CONVECTION INTO THE WESTERN CWA/HILL COUNTRY. FOR WED THROUGH THU THE UPPER TROF WILL LIFT SLOWLY NNEWD ACROSS THE SRN ROCKIES. A SERIES OF DISTURBANCES WILL ROTATE AROUND THE BASE OF THE TROF AND ACROSS WEST AND CENTRAL TX WITH A SLOW MOVING COLD FRONTAL BOUNDARY EASING ACROSS THE AREA. FOR HAVE ONLY GONE WITH SLIGHT CHANCE TO LOW CHANCE POPS FOR THIS PERIOD...BUT IF THIS PATTERN DEVELOPS RAIN CHANCES WILL END UP MUCH HIGHER WITH THE POSSIBILITY OF SEVERE STORMS. UPPER RIDGE BUILDING INTO NE MEXICO/WEST TX FRIDAY AND SATURDAY WILL RESULT IN A NWLY FLOW ALOFT AND HAVE GONE WITH SILENT 10 PERCENT POPS. HOWEVER A POSSIBLE SHORT WAVE IN THE NWLY FLOW SATURDAY NIGHT/EARLY SUNDAY WILL BRING A COLD FRONT INTO CENTRAL TX AND THEREFORE COULD SEE A ROUND OF CONVECTION INTO THE AREA SO HAVE GONE WITH SLIGHT CHANCE POPS AT THAT TIME. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 73 95 73 96 72 / 0 0 10 10 10 AUSTIN BERGSTROM INTL AIRPORT 72 94 72 95 71 / 0 0 10 10 10 NEW BRAUNFELS MUNI AIRPORT 73 94 73 94 73 / 0 0 10 10 10 BURNET MUNI AIRPORT 71 93 70 93 70 / - 0 10 10 10 DEL RIO INTL AIRPORT 71 101 73 98 71 / 10 - 10 10 30 GEORGETOWN MUNI AIRPORT 72 93 71 94 71 / - 0 10 10 10 HONDO MUNI AIRPORT 72 97 72 96 73 / - 0 10 10 20 SAN MARCOS MUNI AIRPORT 72 94 72 94 74 / 0 0 10 10 10 LA GRANGE - FAYETTE REGIONAL 72 93 74 93 73 / 0 0 - - 10 SAN ANTONIO INTL AIRPORT 73 94 73 93 74 / 0 0 10 10 10 STINSON MUNI AIRPORT 75 97 75 96 75 / 0 0 10 10 10 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && MESOSCALE/AVIATION...05 SYNOPTIC/GRIDS...04 PUBLIC SERVICE/DATA COLLECTION...32
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 550 AM CDT SUN MAY 8 2011 TXZ171>173-183>194-202>209-217>225-228-091100- 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- 550 AM CDT SUN MAY 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 723 PM CDT SUN MAY 8 2011 TXZ183-202-090100- KINNEY-VAL VERDE- 723 PM CDT SUN MAY 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN KINNEY AND VAL VERDE COUNTIES UNTIL 800 PM CDT... AT 716 PM CDT...STORM SPOTTERS REPORTED A STRONG THUNDERSTORM 6 MILES WEST OF DEL RIO...MOVING NORTHEAST AT 25 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... DEL RIO... LAUGHLIN AFB... AMANDA...
The Laughlin AFB radar (KDFX), 68 km away, was scanning. The volume nearest the first event began at 00:41 UTC.
1 thunderstorm wind. Local standard time, as filed.
A thunderstorm produced wind gusts estimated at 58 mph which blew a patio cover off a house and onto a road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2011Every state in 2011This day in weather historyWarnings in Texas, May 2011
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: 292125.