A cold front moved through the area and caused thunderstorms which produced heavy rain resulting in flash flooding in the Austin area.
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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 cold front moved through the area and caused thunderstorms which produced heavy rain resulting in flash flooding in the Austin area.
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 Sep 22, 3:32 AM CST, 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 432 AM CDT TUE SEP 22 2009 .DISCUSSION... A COMPLEX OF STORMS WILL HELP DRAW THE COLD FRONT THROUGH THE AREA EARLY TODAY. THE 4 AM POSITION OF THE PREFRONTAL ROUND OF STORMS WAS BEARING DOWN ON THE I-10 CORRIDOR WITH NEAR CONTINUOUS COVERAGE FOR AREAS EAST OF JCT. WHILE SOME STORMS SHOWED A POTENTIAL TO APPROACH SEVERE LEVELS CLOSER TO MIDNIGHT, THE MORNING TIMING APPEARS TO FAVOR NON-SEVERE STORMS. BEHIND THE COMPLEX, THE FRONTAL BOUNDARY APPEARS TO HAVE PUNCHED THROUGH THE SJT AREA AND SHOULD CATCH UP TO THE RAINS, PUSHING THE STRONGEST CONVECTION SOUTH OF THE FORECAST AREA BY NOON. THIS MEANS HIGH TEMPS FOR TODAY SHOULD BE COOLER THAN PREVIOUSLY PROJECTED, WITH SOME AREAS SEEING A SMALL DIURNAL RANGE THROUGH THIS EVENING. OVERRUNNING CONVECTION SHOULD CONTINUE BEHIND THE FRONT BUT SHOULD BE MUCH LESS PERSISTENT THAN THE MORNING ROUND OF RAINS. SOME HEAVY MENTION WAS LEFT IN FOR THIS AFTERNOON FOR AREAS GENERALLY EAST OF I-35. THE HEAVY RAIN FOCUS SHOULD CONCENTRATE ALONG THE COAST TONIGHT INTO EARLY WEDNESDAY AS THE WARM OCEAN WATERS INTERACT WITH THE SHALLOW FRONT. FOR WEDNESDAY AND THURSDAY, THE ECMWF STILL KEEPS SIGNIFICANT RAIN OVER THE I-35 CORRIDOR AREA, BUT THE DRIER GFS/NAM SOLUTIONS LOOK MORE PRACTICAL DUE TO THE GULF INFLUENCE. NEVERTHELESS A GOOD CHANCE OF RAIN WILL LINGER INTO AT LEAST THURSDAY NIGHT BEFORE THE IMPACTS OF THE SLOW MOVING UPPER LOW PULLS AWAY. COOL AND DAMP CONDITIONS SHOULD BE ENHANCED BY SURFACE TROUGHING FEATURE ALONG THE COAST, KEEPING WINDS MOSTLY FROM THE NE. A TRANSITION DAY IS EXPECTED FRIDAY WITH ZONAL FLOW ALOFT STILL CAPABLE OF GENERATING A SLIGHT CHANCE OF RAIN. A SEASONAL AND DRY PATTERN IS EXPECTED FOR THE WEEKEND, BUT MODELS KEEP THE PASSING UPPER RIDGE FOR THE WEEKEND PROGRESSIVE, AND WEAK IMPULSES COULD BRING ADDITIONAL RAINS NEXT WEEK. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 77 59 79 63 81 / 70 40 20 30 30 AUSTIN BERGSTROM INTL AIRPORT 78 59 79 62 82 / 70 40 30 30 30 NEW BRAUNFELS MUNI AIRPORT 78 60 79 62 81 / 70 40 30 30 30 BURNET MUNI AIRPORT 71 55 76 61 78 / 60 30 20 20 30 DEL RIO INTL AIRPORT 79 61 80 62 83 / 40 20 20 20 20 GEORGETOWN MUNI AIRPORT 74 57 79 61 80 / 70 30 20 30 30 HONDO MUNI AIRPORT 78 59 79 60 80 / 70 30 20 30 30 SAN MARCOS MUNI AIRPORT 78 60 79 61 80 / 70 40 30 30 30 LA GRANGE - FAYETTE REGIONAL 79 64 79 65 83 / 80 50 40 40 40 SAN ANTONIO INTL AIRPORT 78 60 79 63 81 / 70 40 30 30 30 STINSON MUNI AIRPORT 79 61 79 63 82 / 70 40 30 30 30 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 18/04
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 501 AM CDT TUE SEP 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- 501 AM CDT TUE SEP 22 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... A COLD FRONT WILL MOVE ACROSS THE AREA TODAY. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS CAN BE EXPECTED MAINLY ALONG AND BEHIND THE FRONT. LOCALLY HEAVY RAINFALL OF NEAR 2 INCHES OR MORE IS POSSIBLE ESPECIALLY ALONG AND EAST OF AN EAGLE PASS TO LEAKEY TO MOUNTAIN HOME LINE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... A SERIES OF UPPER LEVEL DISTURBANCES WILL RIDE OVER THE TOP THE SHALLOW COOL AIRMASS. ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS CAN BE EXPECTED WEDNESDAY THROUGH FRIDAY. THE THREAT OF LOCALLY HEAVY RAINS WILL SHIFT SOUTH OF SOUTH CENTRAL TEXAS AND 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 1249 AM CDT TUE SEP 22 2009 TXZ171>173-188-190-192-220645- BLANCO-BURNET-GILLESPIE-LLANO-TRAVIS-WILLIAMSON- 1249 AM CDT TUE SEP 22 2009 ...STRONG THUNDERSTORMS WERE AFFECTING BLANCO...BURNET...GILLESPIE... LLANO...TRAVIS AND WILLIAMSON COUNTIES... AT 1246 AM CDT...NWS METEOROLOGISTS ARE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTH OF BRIGGS TO TOW...OR ALONG A LINE EXTENDING FROM 10 MILES SOUTH OF COPPERAS COVE TO 7 MILES NORTH OF BUCHANAN DAM...MOVING SOUTH AT 25 MPH. AN OUTFLOW BOUNDARY WILL PRODUCE STRONG WINDS ACROSS MUCH OF THE AREA. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR CAN BE EXPECTED. PEOPLE IN BURNET...LLANO...NORTHEASTERN GILLESPIE...NORTHERN BLANCO...NORTHERN TRAVIS AND WILLIAMSON COUNTIES...INCLUDING THE FOLLOWING LOCATIONS...LAKE VICTOR...SUNNYLANE...TOW...WATSON...LONE GROVE...BLUFFTON...STOLZ...BUCHANAN DAM...BRIGGS AND LLANO...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. WINDS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 145 AM CDT TUE SEP 22 2009 TXZ173-192>194-220745- BASTROP-LEE-TRAVIS-WILLIAMSON- 145 AM CDT TUE SEP 22 2009 ...STRONG THUNDERSTORMS WERE AFFECTING BASTROP...LEE...TRAVIS AND WILLIAMSON COUNTIES... AT 143 AM CDT...NWS METEOROLOGISTS ARE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM BARTLETT TO ROUND ROCK TO LAGO VISTA...OR ALONG A LINE EXTENDING FROM 6 MILES NORTH OF GRANGER TO ROUND ROCK TO 12 MILES WEST OF CEDAR PARK...MOVING SOUTHEAST AT 15 MPH. PEOPLE IN BASTROP...NORTHERN LEE...TRAVIS AND WILLIAMSON COUNTIES... INCLUDING THE FOLLOWING LOCATIONS...CEDAR PARK...GEORGETOWN... LEANDER...GEORGETOWN DAM...WEIR...LAGO VISTA...BARTLETT...ROUND ROCK...GRANGER AND LAKEWAY...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. WINDS 40 TO 50 MPH AND RAINFALL AMOUNTS OF 1 TO 3 INCHES CAN BE EXPECTED WITH THESE STORMS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 246 AM CDT TUE SEP 22 2009 TXZ173-192>194-220845- BASTROP-LEE-TRAVIS-WILLIAMSON- 246 AM CDT TUE SEP 22 2009 ...STRONG THUNDERSTORMS WERE AFFECTING BASTROP...LEE...TRAVIS AND WILLIAMSON COUNTIES... AT 246 AM CDT...NWS METEOROLOGISTS ARE TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM TANGLEWOOD TO BERGSTROM...OR ALONG A LINE EXTENDING FROM 8 MILES NORTH OF LEXINGTON TO 12 MILES SOUTHEAST OF AUSTIN...MOVING SOUTHEAST AT 25 MPH. PEOPLE IN BASTROP...LEE...SOUTHEASTERN TRAVIS AND SOUTHEASTERN WILLIAMSON COUNTIES...INCLUDING THE FOLLOWING LOCATIONS...ELGIN... TANGLEWOOD...WYLDWOOD...LEXINGTON...CEDAR CREEK...CAMP SWIFT... FEDOR...CIRCLE D-KC ESTATES...BASTROP AND PAIGE...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR POSSIBLE WARNINGS AND BE PREPARED TO TAKE APPROPRIATE ACTION SHOULD SEVERE WEATHER THREATEN. WINDS 35 TO 45 MPH AND RAINFALL AMOUNTS UP TO ONE INCH ARE EXPECTED WITH THESE STORMS.
The Ft Hood radar (KGRK), 64 km away, was scanning. The volume nearest the first event began at 10:11 UTC.
1 flash flood. Local standard time, as filed.
Thunderstorms produced heavy rain which resulted in flooding and the closure of a low water crossing on Camp Craft Road and the 6700 block of Lakewood Drive near Bullcreek Park. At 0526 a low water crossing was closed on Posten Lane in the 9700 block.
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, September 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: 194242.