A cold front associated with a 500 mb trough moved across South Central Texas and generated heavy rain which resulted in flash flooding from Bandera to Gonzales counties.
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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 associated with a 500 mb trough moved across South Central Texas and generated heavy rain which resulted in flash flooding from Bandera to Gonzales counties.
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 Nov 20, 5:15 AM CST, 1 hour 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 515 AM CST FRI NOV 20 2009 .AVIATION... VARIABLE CONDITIONS OF LOW MVFR AND IFR CIGS CURRENTLY PREVAIL WITH SCT TO NUMEROUS SHRA AND ISOLD TSRA MOVING NE AT 25 KNOTS. EXPECT CURRENT CONDITIONS TO CONTINUE UNTIL 15-16Z WHEN THE COLD FRONT IN THE TX HILL COUNTRY WILL PUSH SWD THRU THE AREA AND CIGS WILL IMPROVE TO MVFR MOST AREAS. SHRA/TSRA WILL LINGER BEHIND THE FRONT...BUT THE GENERAL TREND WILL BE FOR IMPROVEMENT TO VFR CONDITIONS BY 21-23Z THIS AFTERNOON. LIGHT SELY LOW LEVEL WINDS WILL BE SHIFT TO NLY WINDS AT 10 TO 20 KNOTS BEHIND THE COLD FRONT. && .PREV DISCUSSION... /ISSUED 400 AM CST FRI NOV 20 2009/ DISCUSSION... WIDESPREAD SHOWERS AND THUNDERSTORMS WILL PERSIST ACROSS MUCH OF THE REGION TODAY. A WEAK SFC LOW IS CONTINUING TO DEVELOP OFF THE MIDDLE TEXAS COAST PROVIDING AN AMPLE INFLUX OF GULF MOISTURE INTO SOUTHEAST TEXAS. THIS DEEP MOISTURE WILL COMBINE WITH THE STRENGTHENING LLJ ASSOCIATED WITH THE UPPER LOW ACROSS WEST TEXAS AND RESULT IN A THREAT OF LOCALLY HEAVY RAINFALL. THE HIGHEST RAINFALL TOTALS FROM THIS EVENT ARE EXPECTED TO BE ACROSS THE MIDDLE AND UPPER TEXAS COAST TOWARDS LOUISIANA. HOWEVER...COULD STILL SEE TOTALS OF 1 TO 3 INCHES ALONG AND SOUTHEAST OF THE BALCONES ESCARPMENT WITH ISOLATED TOTALS OF 5 OR MORE INCHES POSSIBLE ACROSS THE COASTAL PLAINS. HAVE LEFT CURRENT FLASH FLOOD WATCH CONFIGURATION ALONE. WITH THAT SAID...THERE IS STILL THE POSSIBILITY OF STREET FLOODING ACROSS URBAN AND METRO AREAS AS RAINFALL TOTALS AS LOW AS ONE INCH CAN CAUSE RUNOFF PROBLEMS. RAIN CHANCES WILL END FROM WEST TO EAST THIS EVENING AS THE UPPER LOW PUSHES THROUGH THE REGION. WITH THE WIDESPREAD CLOUD COVER AND RAIN...TEMPERATURES WILL BE MUTED TODAY AND GENERALLY PEAK IN THE MID 60S TO LOWER 70S. A FEW SHOWERS WILL LINGER ACROSS THE EASTERN PORTION OF THE REGION OVERNIGHT AND INTO EARLY SATURDAY. OTHERWISE...SKIES WILL CONTINUE CLEARING FROM WEST TO EAST DURING THE DAY. THE DRIER NORTHWEST FLOW ALOFT WILL KEEP TEMPERATURES SEASONABLE SATURDAY AND SATURDAY NIGHT. SFC WINDS WILL RETURN TO THE SOUTHEAST EARLY SUNDAY MORNING. A SLIGHT MOISTENING AND WARMING TREND IS EXPECTED SUNDAY THROUGH TUESDAY MORNING AHEAD OF THE NEXT COLD FRONT. AN UPPER TROUGH WILL SWING ACROSS THE GREAT PLAINS EARLY NEXT WEEK AND DRAG A COLD FRONT ACROSS THE STATE LATE MONDAY/EARLY TUESDAY. CHANCES FOR RAIN WITH THIS SYSTEM ARE MUCH LOWER AS THE BULK OF THE UPPER ENERGY WILL BE TOO FAR TO THE NORTH. FOR NOW HAVE GONE WITH SLIGHT TO LOW-END CHANCE POPS MONDAY EVENING THROUGH TUES. MODELS ARE DIVERGENT AS FAR AS HOW LONG THE CLOUDS AND LIGHT RAIN PERSIST BEHIND THE FRONT. FOR THE TIME BEING HAVE FAVORED SEASONABLE TEMPERATURES THROUGH THE END OF THE WEEK. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 65 53 65 46 71 / 100 40 - 0 0 AUSTIN BERGSTROM INTL AIRPORT 64 51 66 39 70 / 100 40 - 0 0 NEW BRAUNFELS MUNI AIRPORT 67 50 70 43 73 / 100 30 - 0 0 BURNET MUNI AIRPORT 64 49 64 44 69 / 70 40 - 0 0 DEL RIO INTL AIRPORT 71 46 72 50 74 / 40 - - 0 0 GEORGETOWN MUNI AIRPORT 65 51 66 45 71 / 100 50 10 0 0 HONDO MUNI AIRPORT 71 45 72 43 75 / 80 10 0 0 0 SAN MARCOS MUNI AIRPORT 66 49 68 43 72 / 100 30 - 0 0 LA GRANGE - FAYETTE REGIONAL 66 52 64 44 71 / 100 60 20 0 0 SAN ANTONIO INTL AIRPORT 69 50 70 46 74 / 100 20 - 0 0 STINSON MUNI AIRPORT 71 51 71 48 75 / 100 20 - 0 0 && .EWX WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH THROUGH THIS AFTERNOON FOR THE FOLLOWING COUNTIES: DE WITT...FAYETTE...GONZALES...LAVACA...LEE. && 25/01
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 433 AM CST FRI NOV 20 2009 TXZ171>173-183>193-202>208-217>222-228-211045- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-KINNEY-UVALDE-MEDINA- BEXAR-COMAL-GUADALUPE-CALDWELL-MAVERICK-ZAVALA-FRIO-ATASCOSA- WILSON-KARNES-DIMMIT- 433 AM CST FRI NOV 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... AN UPPER AIR DISTURBANCE AND COLD FRONT WILL MOVE ACROSS SOUTH CENTRAL TEXAS TODAY AND PRODUCE SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS. LOCALLY HEAVY RAINS OF 1 TO 3 INCHES CAN BE EXPECTED. THE RAINS WILL END FROM THE WEST TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. TXZ194-209-223>225-211045- LEE-FAYETTE-GONZALES-DE WITT-LAVACA- 433 AM CST FRI NOV 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... A FLASH FLOOD WATCH IS IN EFFECT FROM 6 AM TO 6 PM TODAY. AN UPPER AIR DISTURBANCE AND A COLD FRONT WILL MOVE OVER SOUTH CENTRAL TEXAS TODAY...BRINGING WIDESPREAD SHOWERS AND THUNDERSTORMS TO TO THE COASTAL PLAINS. LOCALLY HEAVY RAIN IS LIKELY WITH RAINFALL AMOUNTS OF 1 TO 3 INCHES EXPECTED...AND ISOLATED AMOUNTS NEAR 5 INCHES POSSIBLE. THE RAINS WILL DIMINISH FROM THE WEST TONIGHT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The Austin/San Antonio radar (KEWX), 95 km away, was scanning. The volume nearest the first event began at 12:45 UTC.
8 flash flood. Local standard time, as filed.
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Heavy rain caused flooding which closed Jungman Road.
Heavy rain caused area creeks to flow over roads.
Heavy rain caused flooding which required high water rescues in several places around the San Antonio metropolitan area.
Heavy rain caused water to flow across the roadway of FM 537.
Heavy rain caused flooding which closed FM 108 due to high water across the road.
Heavy rain caused flooding which closed several Farm to Market roads due to high water across the roadway.
Heavy rain caused flooding which closed FM 1681 due to water cover the roadway.
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, November 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: 198391, 198392, 198393, 198394, 198395, 198396, 198397, 198398.