A stagnant upper air pattern of a weak trough combined with deep subtropical moisture to cause thunderstorms for several days. These storms produced isolated areas of heavy rain leading to flash flooding along with some strong winds and large hail.
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.
A stagnant upper air pattern of a weak trough combined with deep subtropical moisture to cause thunderstorms for several days. These storms produced isolated areas of heavy rain leading to flash flooding along with some strong winds and large hail.
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 13, 2:03 PM CST, 1 hour 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 303 PM CDT FRI JUL 13 2012 .DISCUSSION... THIS AFTERNOON SHOWERS AND THUNDERSTORMS HAVE ONCE AGAIN FORMED ACROSS SOUTH CENTRAL TEXAS. CELL MERGERS LATE THIS AFTERNOON INTO THIS EVENING WILL PRODUCE WIND GUSTS OF 30 TO 40 MPH ALONG WITH LOCALLY HEAVY RAINFALL WHICH MAY RESULT IN MINOR FLOODING. THE CONVECTION WILL WANE LATER THIS EVENING WITH THE LOSS OF DAYTIME HEATING. THE FORECAST OVER THE WEEKEND IS DIRECTLY DEPENDENT ON THE MOVEMENT OF THE MID/UPPER LEVEL LOW EMBEDDED WITHIN THE SW/NE SHEAR AXIS. AT 19Z THIS UPPER LEVEL FEATURE WAS LOCATED OVER SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA. MODEL CONSENSUS IS A SLOW WESTWARD MOVEMENT OF THE OF THE UPPER LEVEL LOW. THE ECMWF/NAM TRACK THE LOW JUST THE NORTH OF OUR CWFA WHILE THE GFS IS A LITTLE MORE TO THE SOUTH WITH THE LOW ENDING UP OVER NORTHEAST MEXICO BY MONDAY MORNING. BASED ON THE CURRENT LOCATION OF THIS FEATURE WE PREFER THE GFS TRACK. THUS THE CHANCE FOR SHOWERS AND THUNDERSTORMS ACROSS SOUTH CENTRAL TEXAS WILL CONTINUE THROUGH THE WEEKEND. THE BEST AREAL COVERAGE WILL OCCUR ON THE EASTERN HALF OF THE UPPER LEVEL LOW. TROPICAL MOISTURE IS STILL IN PLACE SO ISOLATED POCKETS OF HEAVY RAINFALL CAN BE EXPECTED. A CONCERN OVER THE WEEKEND IS THE POTENTIAL OF NOCTURNAL CORE RAINS NEAR THE CENTER OF THE UPPER LEVEL LOW AS IT TRACKS SLOWLY WESTWARD. NEXT WEEK THE UPPER LEVEL HIGH BECOMES CENTERED OVER THE LOWER MISSISSIPPI VALLY RIDGING WESTWARD INTO TEXAS. THIS SYNOPTIC SCALE PATTERN WILL RESULT IN A DIMINISHING CHANCE OF SHOWERS AND THUNDERSTORMS ON MONDAY. TUESDAY THROUGH FRIDAY CONVECTION WILL BE MAINLY SOUTH AND EAST OF THE I-35 CORRIDOR ASSOCIATED WITH THE SEA-BREEZE BOUNDARY. ONCE AGAIN THE HPC QPF FORECAST FOR OUR REGION LOOKS TO BE TOO LOW. THE TROPICAL AIRMASS THAT IS IN PLACE COMBINED WITH THE SLOW WESTWARD MOVEMENT OF THE UPPER LEVEL LOW WILL RESULT IN SOME LOCATIONS RECEIVING 1 TO 3 INCHES OF RAINFALL OVER THE NEXT 24 TO 48 HRS. HIGHER TOTALS ARE NOT OUT OF THE QUESTION BASED ON WHAT HAS OCCURRED OVER OUR REGION SINCE TUESDAY. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 74 92 74 92 74 / 20 40 30 40 20 AUSTIN BERGSTROM INTL AIRPORT 72 92 72 91 72 / 20 40 30 40 20 NEW BRAUNFELS MUNI AIRPORT 73 92 73 92 73 / 20 40 30 40 20 BURNET MUNI AIRPORT 73 91 73 90 73 / 20 30 20 30 20 DEL RIO INTL AIRPORT 76 95 76 94 76 / 10 20 20 20 20 GEORGETOWN MUNI AIRPORT 73 91 73 91 73 / 20 40 30 30 20 HONDO MUNI AIRPORT 73 94 73 91 73 / 20 30 20 40 20 SAN MARCOS MUNI AIRPORT 73 92 73 92 73 / 20 40 30 40 20 LA GRANGE - FAYETTE REGIONAL 73 90 73 90 74 / 30 50 30 40 20 SAN ANTONIO INTL AIRPORT 75 92 75 90 75 / 20 40 30 40 20 STINSON MUNI AIRPORT 74 93 74 91 74 / 20 40 30 40 20 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && MESOSCALE/AVIATION...08 SYNOPTIC/GRIDS...13 PUBLIC SERVICE/DATA COLLECTION...32
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 547 AM CDT FRI JUL 13 2012 TXZ171>173-183>194-202>209-217>225-228-141100- 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- 547 AM CDT FRI JUL 13 2012 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...SATURDAY THROUGH THURSDAY... SATURDAY AND SUNDAY THERE IS A CHANCE FOR LOCALLY HEAVY RAIN THAT COULD LEAD TO MINOR FLOODING. OTHERWISE 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 208 PM CDT FRI JUL 13 2012 TXZ193-132015- BASTROP- 208 PM CDT FRI JUL 13 2012 ...SIGNIFICANT WEATHER ADVISORY FOR BASTROP COUNTY UNTIL 315 PM CDT... AT 207 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS FROM ELGIN TO PAIGE...MOVING SOUTH AT 15 MPH. WIND GUSTS NEAR 40 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS... ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... ELGIN... PAIGE... SMITHVILLE... ROSANKY... ROCKNE... TOGO... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 237 PM CDT FRI JUL 13 2012 TXZ173-192-132045- TRAVIS-WILLIAMSON- 237 PM CDT FRI JUL 13 2012 ...SIGNIFICANT WEATHER ADVISORY FOR WILLIAMSON AND TRAVIS COUNTIES UNTIL 345 PM CDT... AT 237 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS FROM EAST OF GEORGETOWN TO TAYLOR AND EXTENDING SOUTHWEST TO AUSTIN...MOVING SOUTH AT 15 MPH. WIND GUSTS OF 30 TO 40 MPH ARE EXPECTED WITH THESE THUNDERSTORMS... ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... WINDEMERE... PFLUGERVILLE... ANDERSON MILL... AUSTIN... AUSTIN BERGSTROM INT AP... TANGLEWOOD FOREST... LAGO VISTA... MANOR... ROLLINGWOOD... WEST LAKE HILLS... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 244 PM CDT FRI JUL 13 2012 TXZ193-209-132100- BASTROP-FAYETTE- 244 PM CDT FRI JUL 13 2012 ...SIGNIFICANT WEATHER ADVISORY FOR BASTROP AND FAYETTE COUNTIES UNTIL 400 PM CDT... AT 242 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS FROM ELGIN TO PAIGE AND EXTENDING TO NORTH OF LA GRANGE...MOVING SOUTH AT 15 MPH. WIND GUSTS OF 40 TO 50 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS... ALONG WITH MODERATE TO HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... SCHULENBURG... ROSANKY... MULDOON... CISTERN... MULLINS PRAIRIE... KOVAR... HOLMAN... O QUINN... AMMANNSVILLE... FLOY... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 320 PM CDT FRI JUL 13 2012 TXZ208-223-132130- CALDWELL-GONZALES- 320 PM CDT FRI JUL 13 2012 ...SIGNIFICANT WEATHER ADVISORY FOR CALDWELL AND GONZALES COUNTIES UNTIL 430 PM CDT... AT 318 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS FROM EAST OF LOCKHART TO NORTH OF GONZALES...MOVING SOUTH AT 15 MPH. WIND GUSTS OF 40 TO 50 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS... ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... GONZALES... WAELDER... SMILEY... LITTLE NEW YORK... DILWORTH... NICKLE... GLAZE CITY... HAMON... OAK FOREST... COST... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 346 PM CDT FRI JUL 13 2012 TXZ225-132145- LAVACA- 346 PM CDT FRI JUL 13 2012 ...SIGNIFICANT WEATHER ADVISORY FOR LAVACA COUNTY UNTIL 445 PM CDT... AT 345 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS NORTHEAST OF HALLETTSVILLE...MOVING TO THE SOUTH AND SOUTHWEST AT 20 MPH. WIND GUSTS OF 40 TO 50 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS... ALONG WITH MODERATE TO HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... YOAKUM... EZZELL... SPEAKS... SWEET HOME... VIENNA... KOERTH... HOPE... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 402 PM CDT FRI JUL 13 2012 TXZ172-173-192-193-132200- BASTROP-BURNET-TRAVIS-WILLIAMSON- 402 PM CDT FRI JUL 13 2012 ...SIGNIFICANT WEATHER ADVISORY FOR BASTROP...SOUTHERN BURNET... SOUTHWESTERN WILLIAMSON AND TRAVIS COUNTIES UNTIL 500 PM CDT... AT 400 PM CDT...NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF THUNDERSTORMS FROM AUSTIN TO SOUTH OF BASTROP...MOVING SOUTH AT 15 MPH. WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE THUNDERSTORMS... ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... AUSTIN... RED ROCK... ROSANKY... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED ROADWAYS.
The Ft Hood radar (KGRK), 53 km away, was scanning. The volume nearest the first event began at 21:29 UTC.
6 flash flood, 5 thunderstorm wind. Local standard time, as filed.
A thunderstorm produced wind gusts estimated at 58 mph that blew down four mature trees and snapped numerous limbs.
A thunderstorm storm produced wind gusts estimated at 45 mph snapped off three inch diameter tree limbs near De Zavala Rd and Vance Jackson Rd in San Antonio.
A thunderstorm produced wind gusts estimated at 58 mph that blew down several trees and power lines in Boerne.
A thunderstorm produced wind gusts estimated at 58 mph that knocked down several trees in Kerrville.
Thunderstorms produced heavy rain that caused flash flooding closing Spicewood Springs Rd between Old Lampasas Tr and Loop 360 in Austin.
A thunderstorm produced wind gusts estimated at 58 mph that flipped over six boats at the Emerald Point Marina on Lake Travis.
Thunderstorms produced heavy rain that caused flash flooding on Brushy Creek at County Road 174 (Brushy Creek Rd) and Great Oaks Dr.
Thunderstorms produced heavy rain that caused flash flooding closing Hwy 183 in the 13000 block near McNeil Dr.
Thunderstorms produced heavy rain that caused flash flooding prompting precautionary evacuations and high water rescues in Round Rock near Brushy Creek.
Numerous roads were closed due to high water in and around the city of Round Rock.
Thunderstorms produced heavy rain that caused flash flooding resulting in several high water rescues in Austin.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2012Every state in 2012This day in weather historyWarnings in Texas, July 2012
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: 397256, 397257, 397258, 397262, 397268, 397273, 397289, 397293, 397299, 404315, 397303.