A moderately unstable air mass developed over South Texas in advance of a frontal boundary draped across portions of south-central Texas. Scattered strong to severe thunderstorms developed over the Hill Country southwest into the higher terrain of northern Mexico in the afternoon of May 10th as an upper level disturbance approached from the west.
Every event with a place to put it. Tap one for its entry below.
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 moderately unstable air mass developed over South Texas in advance of a frontal boundary draped across portions of south-central Texas. Scattered strong to severe thunderstorms developed over the Hill Country southwest into the higher terrain of northern Mexico in the afternoon of May 10th as an upper level disturbance approached from the west. The thunderstorms moved into the Brush Country during the evening hours producing wind damage and large. A complex of thunderstorms moved across Laredo late in the evening into the early morning hours of May 11th and produced locally heavy rainfall. Rainfall amounts of 2 to 3 inches in Laredo produced flash flooding in the city.
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 10, 5:30 PM CST, 1 hour 44 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CORPUS CHRISTI TX 630 PM CDT FRI MAY 10 2013 .DISCUSSION...UPDATED FOR 00Z TAFS. && .AVIATION...ACTIVE WEATHER EXPECTED TONIGHT AND TOMORROW ACROSS THE TAF SITES. THUNDERSTORMS ARE EXPECTED TO DEVELOP AROUND THE LRD SITE BETWEEN 01Z AND 03Z...THEN EXPAND AND MOVE EASTWARD ACROSS THE REST OF SOUTH TEXAS THROUGH THE OVERNIGHT. A PERIOD OF SEVERE STORMS IS POSSIBLE AT THE ONSET OF CONVECTION...THEN RAIN WILL BE POSSIBLE THROUGH THE DAY TOMORROW. MVFR TO IFR CIGS ARE EXPECTED THOUGH TOMORROW MORNING...BUT SHOULD IMPROVE IN THE AFTERNOON. && .PREV DISCUSSION... /ISSUED 337 PM CDT FRI MAY 10 2013/ SHORT TERM (TONIGHT THROUGH SATURDAY NIGHT)...IT WILL TAKE SOME TIME FOR MOISTURE/INSTABILITY TO RECOVER OVER SOUTH TEXAS IN THE WAKE OF THE OUTFLOW BOUNDARY. BUT IT DOES APPEAR TO BE OCCURRING AS WINDS HAVE VEERED TO EASTERLY AND DEWPOINTS HAVE INCHED BACK UP AROUND 70 DEGREES ALONG THE COAST. LAPS/SPC ANALYSIS SHOWS INSTABILITY BUILDING ALONG THE RIO GRANDE BACK INTO THE HIGHER TERRAIN IN NORTHERN MEXICO. STILL HAVING TO DEAL WITH CAPPING INVERSION OVER THE AREA BUT MODELS SHOW THE CAP ERODING AS AN IMPULSE IN THE SOUTHWEST FLOW ALOFT COMES OUT OF COAHUILA TONIGHT. MODELS CONTINUE TO FORECAST INCREASING UPPER LEVEL DIVERGENCE OVER SOUTH TEXAS LATER TONIGHT IN THE LEFT EXIT REGION OF 100 KNOT 25H JET STREAK COMING OUT OF COAHUILA. THE RAPID REFRESH MODEL HAS HAD THE BEST HANDLE ON CONVECTION EARLIER TODAY AND CURRENT ACTIVITY DEVELOPING OVER THE EDWARDS PLATEAU INTO COAHUILA. LOW LEVEL EASTERLY FLOW SHOULD MAINTAIN STORMS OVER NORTHEAST MEXICO INTO THE BRUSH COUNTRY LATER THIS EVENING WITH THE POSSIBILITY OF STORMS STEADILY MOVING EAST AS THE CAP WEAKENS OVER THE COASTAL PLAINS. 0-6 KM SHEAR WILL REMAIN AT 50-60 KNOTS ACROSS SOUTH TEXAS WITH ADEQUATE INSTABILITY TO KEEP A THREAT OF SEVERE STORMS IN THE FORECAST FOR TONIGHT. THE FRONT WILL MOVE THROUGH THE AREA LATE TONIGHT BUT ENOUGH MOISTURE WILL REMAIN OVER THE REGION AS ANOTHER SHORT WAVE TROUGH AND JET STREAK ENTER SOUTH TEXAS FROM THE SOUTHWEST SATURDAY. WILL KEEP LIKELY POPS GOING FOR THE COASTAL PLAINS INTO THE COASTAL WATERS FOR SATURDAY. THE UPPER LOW WILL BECOME DETACHED FROM THE NORTHERN STREAM AS AN UPPER TROUGH SWINGS THROUGH OHIO RIVER VALLEY SATURDAY NIGHT. THIS WILL BRING IN SOME DRIER AIR FROM THE NORTH-NORTHEAST INTO THE SOUTH TEXAS WITH DIMINISHING RAIN CHANCES FOR VICTORIA AREA. THE MOISTURE AXIS WILL REMAIN ALONG THE RIO GRANDE KEEPING A THREAT FOR SCATTERED CONVECTION SATURDAY NIGHT. LONG TERM (SUNDAY THROUGH FRIDAY)...EXTENDED PERIOD BEGINS WITH MODELS IN SOME DISARRAY AS THEY STRUGGLE TO HANDLE MOISTURE POOLING BEHIND THE COLD FRONT MOVING THROUGH OVER THE WEEKEND. CURRENT THINKING IS THAT MOISTURE POOLING ALONG THE RIO GRANDE COULD COMBINE WITH WEAK UPSLOPE FLOW TO TRIGGER ISOLATED CONVECTION OUT WEST SUNDAY AND SUNDAY NIGHT. THIS SCENARIO EXTENDS INTO MONDAY AND TUESDAY AS A SURFACE HIGH BUILDS INTO THE CENTRAL GULF COAST AND ADDITIONAL MOISTURE WRAPS AROUND THE HIGH ON GENERALLY EASTERLY MARINE FLOW. UPPER SUPPORT REMAINS NEUTRAL TO SLIGHTLY POSITIVE AS MODELS MAINTAIN AN UPPER LOW OVER BAJA CALIFORNIA AND ROTATE WEAK RIPPLES THROUGH THAT FLOW. HAVE LEFT IN LOW CHANCE POPS THROUGH TUESDAY NIGHT TO HANDLE THIS POSSIBILITY. BY WEDNESDAY THE UPPER SUPPORT FINALLY LIFTS OUT AND GULF MOISTURE CONDUIT BREAKS DOWN...SO EXPECT DRY WEATHER FROM THERE ON OUT WITH WARMING TEMPERATURES AS GENERALLY UNSETTLED PERIOD ENDS. EXPECT TEMPERATURES TO STAY BELOW NORMALS THROUGH THE FIRST PART OF NEXT WEEK ANTICIPATING HIGHER THEN NORMAL CLOUD COVER AND HUMIDITY LEVELS. HEIGHTS AND TEMPERATURES LOOK TO INCREASE SUBSTANTIALLY TOWARD THE END OF THE PERIOD. && .PRELIMINARY POINT TEMPS/POPS... CORPUS CHRISTI 69 83 66 82 64 / 50 60 20 20 10 VICTORIA 67 82 62 82 60 / 60 50 10 10 10 LAREDO 72 85 67 84 65 / 60 60 40 30 20 ALICE 69 83 65 82 61 / 60 60 20 20 10 ROCKPORT 69 81 68 81 67 / 50 60 20 10 10 COTULLA 68 84 63 82 61 / 60 40 20 10 10 KINGSVILLE 70 84 66 82 62 / 50 60 20 20 10 NAVY CORPUS 70 80 69 79 67 / 50 60 20 20 10 && .CRP WATCHES/WARNINGS/ADVISORIES... TX...NONE. GM...NONE. && PZ/83...AVIATION
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CORPUS CHRISTI TX 734 PM CDT FRI MAY 10 2013 GMZ230-235-250-255-270-275-TXZ229>234-239>247-111200- 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-LA SALLE-MCMULLEN-LIVE OAK-BEE-GOLIAD-VICTORIA-WEBB-DUVAL- JIM WELLS-KLEBERG-NUECES-SAN PATRICIO-ARANSAS-REFUGIO-CALHOUN- 734 PM CDT FRI MAY 10 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH TEXAS AND THE MIDDLE TEXAS COASTAL WATERS. .DAY ONE...TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS SOUTH TEXAS TONIGHT. SOME STORMS MAY BECOME SEVERE...PRODUCING LARGE HAIL AND DAMAGING STRAIGHT-LINE WINDS. AN ISOLATED TORNADO CAN NOT BE RULED OUT. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 2 AM CDT FOR ALL OF SOUTH TEXAS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED TO NUMEROUS THUNDERSTORMS ARE EXPECTED TO PERSIST ON SATURDAY ACROSS MUCH OF SOUTH TEXAS...WITH THE MAIN SEVERE WEATHER CONCERN SHIFTING MORE SOUTH OF THE AREA. THUNDERSTORMS WILL REMAIN IN THE FORECAST OVER THE RIO GRANDE PLAINS AND SOUTHERN BRUSH COUNTRY SUNDAY AND MONDAY...WITH THUNDERSTORM CHANCES SPREADING FARTHER NORTH AND EAST ON TUESDAY AS AN UPPER LEVEL TROUGH APPROACHES TEXAS. HOWEVER...NO ORGANIZED SEVERE WEATHER IS EXPECTED SUNDAY THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS REQUESTED TONIGHT. PLEASE RELAY ALL REPORTS TO LOCAL LAW ENFORCEMENT OR THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI. JR
The Austin/San Antonio radar (KEWX), 127 km away, was scanning. The volume nearest the first event began at 01:16 UTC.
3 hail, 2 flash flood, 1 thunderstorm wind. Local standard time, as filed.
High winds blew down four power poles and caused damage to a garage northeast of the community of Cross.
Spotter reported quarter sized hail occurred northeast of Cross.
Spotter reported quarter sized hail occurred in the southwest portion of Three Rivers.
The Webb County Sheriff's Office reported golf ball sized hail occurred in the community of Rio Bravo.
Laredo Fire Department reported sporadic flooding of roadways throughout the city of Laredo. Flooding affected intersections on the north side of town at McPherson Avenue and International Boulevard as well as McPherson Avenue and Del Mar Boulevard, on the southeast side of Laredo near Los Presidentes Avenue and Loop 20, and Scott and Coke Streets in the downtown area.
Flooding on the northwest side of Laredo led to a water rescue of one person near the intersection of Mines Road and Rancho Viejo Drive. High water flooded a home on Lady Di Loop in north Laredo. Flooding was reported on McPherson Avenue and International Boulevard. Streets were flooded in south Laredo also.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2013Every state in 2013This day in weather historyWarnings in Texas, May 2013
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: 455645, 455646, 455647, 455644, 455640, 455643.