1 flood, as filed by the National Weather Service.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 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 Oct 23, 8:45 AM CST, 1 hour 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 945 AM CDT SAT OCT 23 2004 .UPDATE DISCUSSION... AREAWIDE DOPPLER RADAR CONTINUE TO SHOW SHOWERS AND THUNDERSTORMS ACROSS THE FORECAST WARNING AREA. A FLASH FLOOD WATCH IS IN EFFECT FOR THE EASTERN COUNTIES OF SOUTH CENTRAL TEXAS AND THE HILL COUNTRY INCLUDING THE ESCARPMENT COUNTIES BETWEEN AND INCLUDING SAN ANTONIO AND AUSTIN. SURFACE BOUNDARIES ACROSS THE REGION WILL CONTINUE TO BE THE FOCUS FOR ADDITIONAL DEVELOPMENT OF THUNDERSTORMS THIS AFTERNOON. DEEP SURFACE MOISTURE INPLACE DUE TO THE DOMINANCE OF A EAST GULF RIDGE. UPPER-AIR OBSERVATIONS FROM CORPUS CHRISTI HAVE PWS OF 1.69 INCHES AND SOUTHERLY WINDS FROM THE SURFACE TO 850MBS. DEL RIO HAS A PW OF 1.59 INCHES WITH A VERY MOIST ATMOSPHERE FROM THE SURFACE TO 500MBS. LOTS OF MOISTURE IN THE ATMOSPHERE FOR SURFACE BOUNDARIES TO FOCUS ON IN THE DEVELOPMENT OF THUNDERSTORMS. A UPPER-AIR ANALYSIS REFLECTS A 500MB TROF OVER THE WEST TEXAS INTO NORTHEAST MEXICO MOVING EAST AROUND 20 MPH. THIS TROF WILL SWING ACROSS SOUTH CENTRAL TEXAS TODAY WITH CONVECTIVE ACTIVITY DECREASING OVER THE WESTERN COUNTIES THIS AFTERNOON AND PROGRESSING EASTWARD. HOWEVER...THE DEEP LOW LEVEL MOISTURE INPLACE AND AFTERNOON HEATING WILL CONTINUE THE THREAT OF THUNDERSTORMS THROUGH THE EVENING HOURS AND ONCE AGAIN ON SUNDAY. THE GFS AND ETA MODEL GUIDANCE ARE IN AGREEMENT WITH THE CURRENT WEATHER PATTERN OVER THE REGION. HOWEVER...MODELS DISAGREE WITH THE 24 HOUR SOLUTION. THE GFS CONTINUES THE CONVECTIVE WEATHER THROUGH THE AFTERNOON AND EVENING HOURS WITH ANOTHER SHOT OF THUNDERSTORMS SUNDAY. THE UPPER TROF MOVEMENT AND DECREASING RAIN AND CLOUDS BEHIND THE TROF ARE ALSO FOLLOWING THE GFS. THE GFS ALSO SHOWS A REDEVELOPMENT OF THUNDERSTORMS ON SUNDAY. DUE TO THE GFS MODEL CONFIRMING THE PAST AND CURRENT WEATHER CONDITIONS AND LOOKING AT THE TRENDS OVER THE NEXT FEW PERIODS...SEE NO REASON TO MAKE ANY SIGNIFICANT CHANGES TO THE EARLY MORNING FORECAST PACKAGE. THE CONVECTION OVER THE EASTERN COUNTIES IS MOVING OFF THE THE EAST. THE FLASH FLOOD WATCH OVER THE EASTERN COUNTIES WILL EXPIRE AT 12 NOON. THE ADDITIONAL RAINS EXPECTED THIS AFTERNOON WILL BE THE LOCALIZED. AS THE SOUTHERLY LOW LEVEL FLOW RE-ESTABLISHES ITSELF THIS AFTERNOON AND TONIGHT ACROSS EAST TEXAS...LOOKING FOR ISOLATED AND SCATTERED SHOWERS AND THUNDERSTORMS FOR THIS EVENING AND TONIGHT. AS FOR TOMORROW...SUNDAY...LOOKING FOR ANOTHER TROF TO MOVE ACROSS THE CENTRAL AND NORTHERN SECTIONS OF THE STATE AND THIS WILL GIVE SOUTH CENTRAL TEXAS YET ANOTHER SHOT OF PRECIPITATION...MAINLY THROUGH THE AFTERNOON PERIODS WITH THE HIGHER CHANCES OVER THE EASTERN COUNTIES. && .EWX WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH THROUGH NOON FOR EASTERN COUNTIES...BURNET TO SAN ANTONIO TO LAGRANGE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 541 AM CDT SAT OCT 23 2004 TXZ171>173-183>194-202>209-217>225-228-241100- ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DE WITT- DIMMIT-EDWARDS-FAYETTE-FRIO-GILLESPIE-GONZALES-GUADALUPE-HAYS-KARNES- KENDALL-KERR-KINNEY-LAVACA-LEE-LLANO-MAVERICK-MEDINA-REAL-TRAVIS- UVALDE-VAL VERDE-WILLIAMSON-WILSON-ZAVALA- 541 AM CDT SAT OCT 23 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE... A FLOOD WATCH FOR FLASH FLOODING IS IN EFFECT FOR THE EASTERN HALF OF SOUTH CENTRAL TEXAS...EXCLUDING COUNTIES SOUTH OF INTERSTATE 10. STORMS ARE NOT EXPECTED TO BECOME SEVERE...BUT HEAVY RAIN IS LIKELY IN THE WATCH AREA. RAINFALL AMOUNTS OF 1 TO 2 INCHES WILL BE COMMON...WITH LOCALLY HIGHER AMOUNTS. THE HEAVY RAIN THREAT WILL PEAK THIS MORNING AND TREND DOWN THIS AFTERNOON. .DAYS TWO THROUGH SEVEN... DAYTIME THUNDERSTORMS ARE FORECAST ON SUNDAY...WITH FLASH FLOODING POSSIBLE GIVEN ALREADY SATURATED GROUNDS. ANOTHER STORM SYSTEM WILL APPROACH THE AREA LATE ON WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
728 AM CDT SAT OCT 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0200 AM FLASH FLOOD MEDINA 29.80N 99.25W
10/23/2004 BANDERA TX LAW ENFORCEMENT
BARRICADES UP ON NUMEROUS LOW WATER CROSSINGS AND LOW
LYING AREAS IN THE MEDINA AREA.
0300 AM FLASH FLOOD BOERNE 29.80N 98.74W
10/23/2004 KENDALL TX LAW ENFORCEMENT
BARRICADES UP ON NUMEROUS LOW WATER CROSSINGS AND LOW
LYING AREAS COUNTY WIDE.
0540 AM FLASH FLOOD SAN MARCOS 29.88N 97.93W
10/23/2004 HAYS TX LAW ENFORCEMENT
NUMEROUS BARRICADES UP COUNTY WIDE.
0200 AM FLASH FLOOD MEDINA 29.80N 99.25W
10/23/2004 BANDERA TX LAW ENFORCEMENT
BARRICADES UP ON NUMEROUS LOW WATER CROSSINGS AND LOW
LYING AREAS.
0300 AM FLASH FLOOD BOERNE 29.80N 98.74W
10/23/2004 KENDALL TX LAW ENFORCEMENT
BARRICADES UP ON NUMEROUS LOW WATER CROSSINGS AND LOW
LYING AREAS COUNTY WIDE.
0540 AM FLASH FLOOD SAN MARCOS 29.88N 97.93W
10/23/2004 HAYS TX LAW ENFORCEMENT
BARRICADES UP ON NUMEROUS LOW WATER CROSSINGS AND LOW
LYING AREAS COUNTY WIDE.
&&
DCPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
755 AM CDT SAT OCT 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0745 AM FLASH FLOOD NEW BRAUNFELS 29.70N 98.12W
10/23/2004 COMAL TX LAW ENFORCEMENT
OLD FM 306 AND FM 483 FLOODED.
&&
DCThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Blanco River at Wimberley crested at 17.94 ft at 1130 CST on Oct. 23, where flood stage is 13 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2004Every state in 2004This day in weather historyWarnings in Texas, October 2004
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: 5424835.