Northerly mid level flow combined with strong heating and a boundary from previous convection resulted in the development of an mesoscale convective system over the Edwards plateau. This system moved into the western Hill Country and then South Central Texas during the late afternoon and early evening hours.
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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.
Northerly mid level flow combined with strong heating and a boundary from previous convection resulted in the development of an mesoscale convective system over the Edwards plateau. This system moved into the western Hill Country and then South Central Texas during the late afternoon and early evening hours.
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 19, 5:35 PM CST, 1 hour 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 635 PM CDT SUN JUL 19 2009 .AVIATION... VFR CONDITIONS ARE EXPECTED TO PREVAIL THROUGH THE TAF PERIOD. ISOLATED CONVECTION WILL CONTINUE THROUGH THIS EVENING PREDOMINANTLY SOUTHEAST OF THE I-35 CORRIDOR. HAVE KEPT MENTION OF CB IN AT KAUS UNTIL 02Z...BUT NOT ANTICIPATING ANY IMPACTS. STRATUS DECK IS EXPECTED TO REDEVELOP ALONG THE ESCARPMENT OVERNIGHT...THUS TEMPO MVFR CIGS ARE ANTICIPATED AT I-35 TAF SITES IN THE NEAR-DAWN HOURS. SE- SLY SFC WINDS WILL REMAIN AOB 10 KTS. && .PREV DISCUSSION... /ISSUED 357 PM CDT SUN JUL 19 2009/ DISCUSSION... MCV RESULTING FROM THE OVERNIGHT MCS THAT DISSIPATED OVER THE NORTHWESTERN HILL COUNTRY THIS MORNING IS MOVING EAST ACROSS THE SAN ANTONIO AREA THIS AFTERNOON. THIS HAS STABILIZED THE AIRMASS ACROSS SOUTH CENTRAL TEXAS WHILE DEWPOINTS WERE SLOWLY MIXING TO LOWER VALUES. A MOISTURE AXIS FROM THE DALLAS/FORT WORTH METROPLEX TO THE HOUSTON AREA WILL KEEP POPS MAINLY OVER THE FAR EASTERN AREAS GOING INTO THIS EVENING, HOWEVER WILL KEEP A SLIGHT CHANCE ELSEWHERE FOR THIS AFTERNOON. MOST MODELS SHOW THE UPPER LEVEL PATTERN WILL SLOWLY BECOME LESS AMPLIFIED ACROSS TEXAS. THE FLOW ALOFT WILL SHIFT AWAY FROM SOUTHERN TEXAS AS THE SUBTROPICAL RIDGE SLOWLY BUILDS BACK TO THE EAST FROM THE FOUR CORNERS AND DESERT SOUTHWEST REGION. DAYTIME HEATING AND A STILL WEAKER CAP WILL ALLOW FOR SLIGHT TO LOW CHANCE POPS FOR MONDAY. THEN THE APPROACH OF A SHORT-WAVE AND WEAK COLD FRONT WILL CREATE SLIGHT CHANCE POPS TUESDAY INTO TUESDAY NIGHT. AFTER THAT, WEDNESDAY THROUGH NEXT WEEKEND, THE SUBTROPICAL RIDGE BUILDS FURTHER OVER THE AREA WITH CAP STRENGTHENING. THE FRONT MOVES BACK NORTH WITH LITTLE IMPACT ON THE AREA. POPS ARE OUT OF THE FORECAST WEDNESDAY THROUGH NEXT WEEKEND, HOWEVER CAN NOT RULE AN ISOLATED SHOWER OR THUNDERSTORM MAINLY ALONG THE SEABREEZE. MAV/MEX HIGHS CONTINUE TO RUN COOL DUE TO LACK OF SOIL MOISTURE AND MIXING OF DEWPOINTS UP TO 10 DEGREES LOWER THAN MAV/MEX. HAVE GONE HOTTER BY UP TO 8 DEGREES MONDAY INTO TUESDAY AND UP TO 5 DEGREES WEDNESDAY THROUGH NEXT WEEKEND. EXPECT HIGHS IN THE UPPER 90S TO AROUND 101 MOST AREAS. MAV/MEX LOWS LOOK REASONABLE, ALTHOUGH WARMED THEM UP TO 2 DEGREES IN A FEW SPOTS LATE IN THE WEEK DUE HIGHER LATE NIGHT INTO EARLY MORNING DEWPOINTS. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 76 99 75 99 75 / 10 30 10 20 20 AUSTIN BERGSTROM INTL AIRPORT 74 99 74 99 72 / 10 30 10 20 20 NEW BRAUNFELS MUNI AIRPORT 74 99 74 99 73 / - 20 10 20 20 BURNET MUNI AIRPORT 73 95 73 95 72 / 10 30 10 20 20 DEL RIO INTL AIRPORT 77 103 76 100 78 / - 10 - 10 - GEORGETOWN MUNI AIRPORT 74 95 73 95 73 / 20 30 20 20 20 HONDO MUNI AIRPORT 73 100 73 99 74 / - 20 10 10 10 SAN MARCOS MUNI AIRPORT 75 99 74 99 74 / - 30 10 20 20 LA GRANGE - FAYETTE REGIONAL 75 97 74 97 73 / 20 30 10 20 20 SAN ANTONIO INTL AIRPORT 77 99 75 98 76 / - 20 10 20 20 STINSON MUNI AIRPORT 76 99 74 99 76 / - 20 10 10 20 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 08/25
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 536 AM CDT SUN JUL 19 2009 TXZ171>173-183>194-202>209-217>225-228-201045- 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- 536 AM CDT SUN JUL 19 2009 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.
The Ft Hood radar (KGRK), 84 km away, was scanning. The volume nearest the first event began at 01:07 UTC.
3 thunderstorm wind, 1 hail. Local standard time, as filed.
A farmer in Ledbetter reported damage to his barn along with trees blown down.
An employee at Mouton Feed Company reported penny size hail northwest of Mouton.
Strong winds from a thunderstorm caused tree and structure damage near the Lost Valley Golf Course.
The utility company reported large tree limbs down on powerlines.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2009Every state in 2009This day in weather historyWarnings in Texas, July 2009
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: 181200, 179773, 179774, 179778.