A weak upper level short wave trough of low pressure moved into central Texas and caused thunderstorms which moved southward into Williamson and Bastrop counties. These storms produced severe wind damage and hail.
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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 short wave trough of low pressure moved into central Texas and caused thunderstorms which moved southward into Williamson and Bastrop counties. These storms produced severe wind damage and 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 Aug 22, 1:43 PM CST, 2 hours 33 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 243 PM CDT SAT AUG 22 2009 .DISCUSSION... TONIGHT THROUGH MONDAY- THE LONGWAVE TROF OVER THE EASTERN U.S. KEEPS THE COLD FRONT STEADILY MOVING SOUTH THRU THE EASTERN HALF OF TEXAS. THE FRONT WILL CLIP OUT NORTHEAST COUNTIES, ALIGNING NORTHWEST-SOUTHEAST AND SLICING THROUGH BURNETT, WILLIAMSON, AND LEE COUNTIES. BY MONDAY AFTERNOON, THE FRONT HAS SHIFTED A BIT EAST, JUST OUTSIDE OF THE CWA NEAR WILLIAMSON AND LEE COUNTIES. WILL KEEP LOW POPS IN THE VICINITY OF THE FRONT BECAUSE OF ISOLATED NATURE AND LACK OF OPTIMUM PRECIPITABLE WATER. THE UPPER HIGH IS BUFFETED FROM ALL SIDES BY PROGRESSIVE TROFS IN THE WESTERLIES AND DISTURBANCES IN THE EASTERLIES. THE UPPER HEIGHTS OVER THE CWA GRADUALLY FALL AS THE RIDGE AXIS SHIFTS WEST, ALLOWING A FEW DISTURBANCES TO MOVE THROUGH THE EASTERN HALF OF THE CWA. THE SHORTENING OF DAYLIGHT AND SLACK SFC GRADIENT ARE ALLOWING MIN TEMPS TO FALL TO SEASONAL NORMALS. TUESDAY THROUGH SATURDAY- ONCE AGAIN THE MODELS ARE SHOWING THE UPPER TROF BROADENING ACROSS THE U.S. CONFINING THE UPPER RIDGE TO THE ROCKIES. THE TRANSITION WILL BRING COOLER MORNINGS AS WE CONTINUE THE TRANSITION TOWARD FEWER MINUTES OF DAYLIGHT. DAYTIME HIGHS WILL MODERATE BUT REMAIN ABOVE NORMAL. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 77 101 76 99 75 / 20 10 - 10 10 AUSTIN BERGSTROM INTL AIRPORT 72 102 74 99 73 / 10 10 - 10 10 NEW BRAUNFELS MUNI AIRPORT 73 101 72 98 72 / 10 10 - 10 10 BURNET MUNI AIRPORT 74 98 74 98 74 / 10 10 - 10 10 DEL RIO INTL AIRPORT 76 106 77 101 76 / 10 10 0 - - GEORGETOWN MUNI AIRPORT 76 98 75 99 74 / 30 10 - 10 10 HONDO MUNI AIRPORT 73 102 73 100 72 / 10 10 - - - SAN MARCOS MUNI AIRPORT 74 100 73 98 73 / 10 10 - 10 10 LA GRANGE - FAYETTE REGIONAL 75 96 73 96 74 / 10 10 10 10 10 SAN ANTONIO INTL AIRPORT 78 101 76 99 76 / 10 10 - - - STINSON MUNI AIRPORT 76 103 74 100 73 / 10 10 - - - && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 06/08
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 514 AM CDT SAT AUG 22 2009 TXZ171>173-183>194-202>209-217>225-228-231015- 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- 514 AM CDT SAT AUG 22 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...SUNDAY THROUGH FRIDAY... 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 248 PM CDT SAT AUG 22 2009 TXZ171>173-194-222200- LLANO-BURNET-WILLIAMSON-LEE- INCLUDING THE CITIES OF...LLANO...BURNET...GEORGETOWN...GIDDINGS 248 PM CDT SAT AUG 22 2009 ...MID TO LATE AFTERNOON THUNDERSTORMS POSSIBLE... WIDELY SCATTERED SHOWERS AND THUNDERSTORMS FROM NORTH OF LLANO TO EAST OF TAYLOR WILL CONTINUE TO MOVE SOUTH AT 20 MPH. THESE SHOWERS AND THUNDERSTORMS ARE EXPECTED TO MOVE OVER PARTS OF LLANO...BURNET...WILLIAMSON AND LEE COUNTIES THIS AFTERNOON. BRIEF WIND GUSTS OF 25 TO 45 MPH ARE POSSIBLE IN OR NEAR THE THUNDERSTORMS...ALONG WITH OCCASIONAL LIGHTNING. SPOTTY RAINFALL AMOUNTS NEAR A TRACE TO A QUARTER OF AN INCH ARE POSSIBLE.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 450 PM CDT SAT AUG 22 2009 TXZ171-172-222215- BURNET-LLANO- 450 PM CDT SAT AUG 22 2009 ...STRONG THUNDERSTORMS WERE AFFECTING BURNET AND LLANO COUNTIES... AT 450 PM CDT...NWS METEOROLOGISTS ARE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM INKS LAKE STATE PARK TO 5 MILES NORTHWEST OF OXFORD TO FIELD CREEK...OR ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF KINGSLAND TO 10 MILES SOUTHWEST OF LLANO TO 18 MILES NORTHEAST OF MASON...MOVING SOUTH AT 20 MPH. PEOPLE IN LLANO AND SOUTHWESTERN BURNET COUNTIES...INCLUDING THE FOLLOWING LOCATIONS...FIELD CREEK...INKS LAKE STATE PARK... GAINESVILLE...KINGSLAND...OXFORD...SUNRISE BEACH VILLAGE...GRANITE SHOALS...CASTELL AND PRAIRIE MOUNTAIN...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. SMALL HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THESE STORMS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 508 PM CDT SAT AUG 22 2009 TXZ173-192>194-222245- BASTROP-LEE-TRAVIS-WILLIAMSON- 508 PM CDT SAT AUG 22 2009 ...A STRONG THUNDERSTORM WAS AFFECTING BASTROP...LEE...TRAVIS AND WILLIAMSON COUNTIES... AT 508 PM CDT...NWS METEOROLOGISTS ARE TRACKING A STRONG THUNDERSTORM NEAR ELGIN...MOVING SOUTH AT 10 MPH. PEOPLE IN EASTERN TRAVIS...NORTHERN BASTROP...SOUTHEASTERN WILLIAMSON AND WESTERN LEE COUNTIES...INCLUDING THE FOLLOWING LOCATIONS... ELGIN...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. MARBLE SIZE HAIL...AND WINDS 30 TO 40 MPH ARE EXPECTED WITH THIS STORM.
The Ft Hood radar (KGRK), 38 km away, was scanning. The volume nearest the first event began at 22:14 UTC.
4 thunderstorm wind. Local standard time, as filed.
A thunderstorm produced wind gusts, estimated at 50 knots, that caused minor damage to a home and knocked over several trees. In addition, this storm dropped quarter size hail.
A thunderstorm produced wind gusts, estimated at 45 knots, that blew down numerous trees in Bastrop.
A barn was destroyed on Highway 71 east of the Austin Bergstrom International Airport by thunderstorm winds estimated at 50 knots.
A thunderstorm produced heavy rain and wind gusts, estimated at 45 knots, that knocked over highway signs.
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, August 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: 189366, 189367, 189369, 189371.