4 thunderstorm wind, 2 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 2 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 Apr 23, 2:56 PM CST, 9 hours 23 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 356 PM CDT FRI APR 23 2004 .DISCUSSION... CONVECTION DEVELOPING ALONG DIFFERENTIAL HEATING BOUNDARY OVER THE COASTAL BEND AND OVER THE SIERRA MADRE MOUNTAINS OF NORTHERN MEXICO. SHORT-WAVE TO THE SOUTHWEST OF THE BIG BEND IS INTERACTING WITH MOIST SOUTHERLY FLOW WITH PWS IN THE 1.2 TO 1.8 INCH RANGE. EXPECT CONVECTION TO SLOWLY INCREASE DURING THE NIGHTTIME HOURS AND PEAK DURING THE DAY ON SATURDAY AS SHORT-WAVE MOVES OVERHEAD. COULD BE SOME SEVERE VAL VERDE AND EDWARDS COUNTY THIS EVENING AS DRYLINE MIXES EASTWARD ENCOUNTERING SUFFICIENT INSTABILITY AND SHEAR. OTHERWISE, MAIN THREAT WILL BE HEAVY RAINFALL ON SATURDAY AS UPPER TROUGH AND COLD FRONT APPROACHES AND SOME BOUNDARIES BECOME ESTABLISHED. WILL HOLD OFF ISSUING FLASH FLOOD WATCH FOR NOW, HOWEVER LATER SHIFTS WILL LIKELY ISSUE ONE AS LOCATIONS AND RAINFALL AMOUNTS BECOME MORE CERTAIN. AT PRESENT, THE PROBABLE FAVORED LOCATIONS WILL BE HILL COUNTRY/EASTERN SOUTH CENTRAL TEXAS AND AMOUNTS OF 1 TO 2 INCHES WITH ISOLATED TOTALS OF 3 TO 4 INCHES. COLD FRONT MOVES THROUGH LATE SATURDAY NIGHT AND SUNDAY WITH RAIN CHANCES SLOWLY ENDING BY MONDAY AS UPPER TROUGH EXITS TO THE EAST WITH RIDGING SURFACE AND ALOFT BUILDING INTO TEXAS. DRY WEATHER TUESDAY, THEN ANOTHER TROUGH DEVELOPS OUT WEST WITH MOISTURE RETURNING WEDNESDAY LEADING TO SLIGHT POPS THURSDAY AND FRIDAY. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 67 74 63 77 / 60 70 50 40 AUSTIN BERGSTROM INTL AIRPORT 68 74 62 76 / 60 70 50 40 DEL RIO INTL AIRPORT 69 78 63 80 / 70 50 30 30 SAN ANTONIO INTL AIRPORT 68 75 64 76 / 60 70 50 40 && .EWX WATCHES/WARNINGS/ADVISORIES...NONE. && 04/02
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 900 PM CDT FRI APR 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- THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TONIGHT INTO EARLY SATURDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER SOUTH CENTRAL TEXAS TONIGHT AND INTO EARLY SATURDAY. STRONG TO SEVERE THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS NORTH CENTRAL TEXAS OVERNIGHT AND MOVE INTO THE HILL COUNTRY THE CONTINUE SOUTH DURING THE EARLY MORNING HOURS ON SATURDAY. DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE. .DAYS TWO THROUGH SEVEN... A WEAK COLD FRONT WILL MOVE INTO SOUTH CENTRAL TEXAS SATURDAY INCREASING THE CHANCES FOR THUNDERSTORMS THROUGH SUNDAY. THE FRONTAL BOUNDARY WILL PROVIDE A FOCUS FOR SHOWER AND THUNDERSTORM DEVELOPMENT WHILE A SERIES OF UPPER AIR DISTURBANCES PROVIDE THE NECESSARY LIFT. THERE IS THE POTENTIAL FOR LOCALLY HEAVY RAINFALL AND FLASH FLOODING SATURDAY INTO SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT AND INTO EARLY SATURDAY.
The Austin/San Antonio radar (KEWX), 95 km away, was scanning. The volume nearest the first event began at 06:18 UTC.
4 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Severe thunderstorm winds overturned mobile homes and damaged roofs at Charlotte and blew over trees near Christine.
Storms produced between 2 and 3 inches of rain in the Lytle area, near the Bexar County line. Roads in and around Lytle were closed due to flash flooding.
Rainfall over western Bexar County averaged between 2 and 3 inches. Flash flooding was reported over roads north of Helotes and west of Von Ormy.
Severe thunderstorm winds moved a wooden barn off its foundation near US123 and FM1681 just north of Stockdale.
Severe thunderstorm winds broke off large tree limbs and damaged roofs in Floresville.
Several trees were uprooted by severe thunderstorm winds.
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, April 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: 5392023, 5392024, 5392025, 5392026, 5392027, 5392028.