Hurricane Alex made landfall in northern Mexico on June 30 and brought deep |tropical moisture into South Central Texas. With the moisture in place, a series of upper |level short wave troughs moved through the region causing thunderstorms which |produced heavy rain over several days.
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 EWX wrote it up.
Hurricane Alex made landfall in northern Mexico on June 30 and brought deep |tropical moisture into South Central Texas. With the moisture in place, a series of upper |level short wave troughs moved through the region causing thunderstorms which |produced heavy rain over several days. From June 30 through July 6 the following rainfall totals were reported by CoCoRaHS observers: Langtry 10.6W: 14.38 inches and Comstock 8.5WNW: 12.05 inches. This excessive rainfall resulted in flash flooding in Val Verde county and flooding farther downstream in Maverick 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 Jul 4, 5:31 AM CST, 2 hours 59 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 631 AM CDT SUN JUL 4 2010 .DISCUSSION... SEE AVIATION SECTION. && .AVIATION... MVFR CONDITIONS WILL BE SLOW TO IMPROVE THIS MORNING..HOWEVER VFR CONDITIONS ARE FORECAST TO PREVAIL BY 17Z AT I-35 TERMINALS. THUNDERSTORMS ARE FORECAST AT KDRT LATER TODAY WITH MVFR CONDITIONS PERSISTING. SCATTERED SHOWERS ARE FORECAST NEAR I-35 TERMINALS TODAY...BUT POPS ARE TOO LOW TO INCLUDE IN FORECAST PREVAILING CONDITIONS. A MODERATE SSE LOW LEVEL FLOW IS FORECAST TO PERSIST...WITH SURFACE WIND GUSTS BETWEEN 23-27 MPH TODAY. && .PREV DISCUSSION... /ISSUED 344 AM CDT SUN JUL 4 2010/ DISCUSSION... SHOWERS AND THUNDERSTORMS CONTINUE TO TRAIN NORTHWARD ACROSS VAL VERDE COUNTY. THE DEEP TROPICAL MOISTURE AXIS WILL REMAIN OVER VAL VERDE COUNTY TODAY SO WE HAVE EXTENDED THE FLASH FLOOD WATCH THRU 7 PM THIS EVENING. EARLY THIS MORNING THE REMAINDER OF THE CWFA WAS EXPERIENCING ISOLATED TO SCATTERED STREAMER SHOWERS ASSOCIATED WITH THE LOW LEVEL JET. FOR TODAY...NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS VAL VERDE COUNTY WITH ISOLATED TO SCATTERED CONVECTION EXPECTED ACROSS THE REMAINDER OF THE CWFA. PWATS ARE STILL IN EXCESS OF 2 INCHES...SO LOCALLY HEAVY RAINFALL IS POSSIBLE...ESPECIALLY ACROSS VAL VERDE COUNTY. AFTERNOON TEMPS WILL RANGE FROM THE MID 80S ACROSS THE RAIN COOLED EDWARDS PLATEAU TO AROUND 90 EAST OF THE I-35 CORRIDOR WHERE PARTLY SUNNY SKIES ARE EXPECTED. MONDAY...THE GFS MOVES THE VORT MAX AND QPF BULLS EYE NORTHWARD TO THE RED RIVER WHILE THE NAM...ECMWF AND GEM KEEP THE TROPICAL MOISTURE AXIS ACROSS OUR WESTERN COUNTIES. WE PREFER THE LATTER SOLUTION FOR MONDAY SO RAIN CHANCES WILL CONTINUE FOR SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. EARLY THIS MORNING THE IR/WV SATELLITE LOOP DEPICTS AN UPPER LEVEL LOW PRESSURE SYSTEM SOUTH OF THE MISSISSIPPI DELTA. IT LOOKS LIKE THIS FEATURE WILL DRIFT TO THE WEST OR NORTHWEST OVER THE NEXT FEW DAYS. STILL SOME UNCERTAINTY ON THE TRACK AND STRENGTH OF THIS SYSTEM SO WILL MAINTAIN SLIGHT CHANCE POPS TUESDAY THROUGH THURSDAY. THE NEXT WEATHER SYSTEM THAT MAY IMPACT TEXAS LATE IN THE WEEK IS THE TROPICAL WAVE CURRENTLY LOCATED OVER THE WESTERN CARIBBEAN. THE ECMWF MOVES THIS SYSTEM INTO THE GULF...WITH LANDFALL ON FRIDAY NEAR TAMPICO MEXICO. THE NAM HAS A SIMILAR TRACK. WE WILL CONTINUE SLIGHT CHANCE/CHANCE POPS FRIDAY THRU SUNDAY AND WILL WAIT SEE WHAT TRANSPIRES OVER THE GULF. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 90 77 91 77 92 / 30 20 20 20 20 AUSTIN BERGSTROM INTL AIRPORT 90 76 91 76 92 / 30 20 20 20 20 NEW BRAUNFELS MUNI AIRPORT 90 76 91 75 92 / 30 20 20 20 20 BURNET MUNI AIRPORT 87 74 88 75 91 / 40 30 30 20 20 DEL RIO INTL AIRPORT 84 76 89 77 91 / 80 50 30 20 20 GEORGETOWN MUNI AIRPORT 88 75 89 76 92 / 30 20 30 20 20 HONDO MUNI AIRPORT 90 77 90 75 93 / 30 30 20 20 20 SAN MARCOS MUNI AIRPORT 90 75 91 75 92 / 30 20 20 20 20 LA GRANGE - FAYETTE REGIONAL 90 76 91 77 92 / 30 20 20 20 20 SAN ANTONIO INTL AIRPORT 90 77 91 77 92 / 30 30 20 20 20 STINSON MUNI AIRPORT 90 77 92 77 92 / 30 30 20 20 20 && .EWX WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING COUNTIES: VAL VERDE. && 13/11
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 516 AM CDT SUN JUL 4 2010 TXZ171>173-183>194-202>209-217>225-228-051115- 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- 516 AM CDT SUN JUL 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... A FLASH FLOOD WATCH IS IN EFFECT FOR VAL VERDE COUNTY THROUGH THIS EVENING. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES CAN BE EXPECTED...WITH ISOLATED TOTALS NEAR 4 INCHES POSSIBLE. IN ADDITION TO THE FLASH FLOOD THREAT...THE PECOS RIVER AND THE RIO GRANDE BOTH ABOVE AND BELOW LAKE AMISTAD WILL LIKELY FLOOD WITH ADDITIONAL RAINFALL. LOCALLY HEAVY RAINFALL IS POSSIBLE ACROSS EDWARDS...KINNEY AND MAVERICK COUNTIES TODAY AND TONIGHT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... FLASH FLOODING AND RIVER FLOODING WILL CONTINUE TO BE THREATS FOR VAL VERDE COUNTY AND MAY EXPAND EAST INTO PORTIONS OF EDWARDS... KINNEY AND MAVERICK COUNTIES ON MONDAY. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The Laughlin AFB radar (KDFX), 111 km away, was scanning. The volume nearest the first event began at 14:28 UTC.
4 flash flood, 2 flood. Local standard time, as filed.
Thunderstorms produced heavy rain which caused flash flooding. One and a half feet of water covered a four mile stretch of Hwy 163 around Bakers Crossing.
Thunderstorms produced heavy rain which caused flash flooding. One and a half feet of water covered Ranch Road 1024 at Cow Creek.
Thunderstorms produced heavy rain which caused flash flooding and closed Hwy 163 at the Val Verde/Crockett line.
Thunderstorms produced heavy rain which caused flash flooding. Four to five feet of water covered a portion of Blue Hills Road between Comstock and Pandale.
Thunderstorms produced heavy rain over the last couple of days which caused major flooding in the Del Rio area. The Vega Verde subdivision was evacuated and the International Bridge was closed for several days.
Heavy rain from thunderstorms over the last few days caused flooding of Elm Creek which closed Hwy 277 North.
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, July 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: 247657, 247658, 247659, 247660, 247662, 247666.