3 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 3 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, 3:26 AM CST, 4 hours 4 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 426 AM CDT SAT OCT 23 2004 .UPDATE... STORMS CONTINUE TO FIRE ALONG THE SOUTHWEST EDGE OF THE RAIN-COOLED BOUNDARY THIS MORNING. HAVE RAISED POPS AND EXTENDED THE FF WATCH ALONG AND EAST OF IH35 AND NORTH OF IH10 THROUGH NOON TODAY. && .PREV DISCUSSION... STRONG MID-UPPER TROF POISED ALONG TX-NM BORDER EARLY THIS MORNING WITH SIGNIFICANT COLD AIR ALOFT BEHIND IT. LITTLE IN WAY OF A SURFACE FRONTAL FEATURE IS NOTED. IN SC TX...LINE OF STORMS MOVING ENEWD THRU AREA HAS WEAKENED INTO BROAD AREA OF LIGHT TO MODERATE RAIN. EXPECT THE PRECIP TO CONTINUE EWD...POSSIBLY FORMING A WEAK RAIN- COOLED BOUNDARY ALONG AND JUST NORTH OF IH10 FOR THE AFTN HEATING TO WORK ON. HEATING WILL BE LIMITED BY CLOUDS FROM THE DEEP LOW LEVEL MOISTURE...PW VALUES ARE 1.6 TO 1.9 TODAY...AND HIGH CLOUD FROM THE RIGHT REAR QUAD OF A H3 JET. BOTH GFS AND ETA FIT WELL WITH CURRENT RAIN PATTERN AND MOVEMENT OF UPPER TROF EWD THIS AM...BUT SPLIT ON THE AFTN FCST. AT THIS TIME... PREFER GFS WITH RAIN PRETTY MUCH CONFINED TO NERN COUNTIES THIS AFTN AND LITTLE TO WEST OR SOUTH. STABILIZING CONDITIONS BEHIND THE EARLY MORNING PRECIP AGREE WITH THE GFS ON SCATTERED STORMS WITH LESS INTENSITY AND COVERAGE FOR THE REST OF THIS MORNING AND AFTN. WILL ALLOW FF WATCH TO EXPIRE AT 6 AM THIS MORNING. A SOUTHERLY LOW LEVEL FLOW WILL RE-ESTABLISH ITSELF ACROSS SC TX THIS AFTN INTO TONITE. WILL PLACE LOW POPS ACROSS AREA TONIGHT. GFS INDICATES ANOTHER AREA OF LIFT ACROSS CENTRAL AND NORTH SECTIONS ON SUN...MAINLY THRU THE AFTN PERIOD. HAVE LOWERED TEMPS A DEGREE OR TWO IN VIEW OF INCREASED CLOUDS AND CONCENTRATED THE PRECIP ALONG AND JUST EAST OF IH35 CORRIDOR. WITH NO SIGNFICANT AIRMASS CHANGES FROM SUN INTO THE FIRST OF NEXT WEEK...CONTINUED WITH LOW POPS AND ABOVE NORMAL HIGHS EACH DAY. && .EWX WATCHES/WARNINGS/ADVISORIES...FF WATCH BURNET TO SAN ANTONIO TO LAGRANGE THROUGH NOON. && 09/11
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 Austin/San Antonio radar (KEWX), 42 km away, was scanning. The volume nearest the first event began at 13:31 UTC.
3 flash flood. Local standard time, as filed.
Showers and thunderstorms continued to spread eastward into Caldwell County, producing general 2 to 3 inch totals. Lockhart reported almost 4 inches of rain and flash flooding of area streets just before 0800 CST.
Storms spread southeastward into Gonzales and Guadalupe Counties from Caldwell and Hays Counties before sunrise. Rain totals over the county averaged 2 inches, with 3 to 4 inches across the central part of the county. Highest totals were 6 inches in the stretch from Belmont to Gonzales. Gonzales reported widespread street flooding, with most central Gonzales County rural roads under water.
Storms from Hays County moved southeastward into Guadalupe County before sunrise, producing rain totals of 2 to 3 inches countywide. Highest totals were between 3 and 4 inches along the Gonzales County line near where US90 crosses. Widespread flash flooding closed county roads through the early morning.
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: 5424832, 5424833, 5424834.