6 flash flood, as filed by the National Weather Service.
Every event with a place to put it; 6 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 2, 10:30 AM CST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1030 AM CST FRI APR 2 2004 .DISCUSSION... EFFICIENT EARLY APRIL RAIN MAKING SYSTEM WILL AFFECT THE AREA TODAY. MENTIONED FLASH FLOOD WATCH FOR EAST HALF OF CWA...WHERE RAIN APPEARS LIKELY AND THE LOCALLY HEAVY RAIN RISK IS HIGH. CONFIGURED POPS AND DAYTIME HIGHS TO MATCH MESO SCALE TRENDS AS THEY INTERACT WITH THE ON GOING SYNOPTIC PATTERN. LEFT TONIGHT THROUGH THURSDAY FORECASTS AS SHOWN BY EARLY MORNING PACKAGE. FLASH FLOOD WATCH FOR EAST HALF OF CWA GOES TRHOUGH 4 PM THIS AFTERNOON. WILL REEVALUTE FOR EXTENSION IN TIME OR CHANGES. .PREVIOUS DISCUSSION... CLOSED UPPER LOW CURRENTLY LOCATED OVER SOUTHERN CALIFORNIA WILL BECOME NEARLY STATIONARY OVER SOUTHERN ARIZONA/NORTHERN MEXICO THIS WEEKEND. IMPULSES EJECTING NORTHEASTWARD ACROSS TEXAS WILL IMPACT THE CWFA OVER THE WEEKEND. THE FIRST IMPULSE APPROACHING THE CWFA IS ALREADY GENERATING SCATTERED CONVECTION ACROSS FAR WEST TEXAS AND THE BIG BEND. AS THIS INITIAL IMPULSE SHEARS OUT OVER THE CWFA TODAY EXPECT AN INCREASING CHANCE OF SHOWERS AND THUNDERSTORMS. SPC HAS PLACED SOUTH CENTRAL TEXAS IN THE SLIGHT RISK AREA FOR TODAY. IF ENOUGH SURFACE HEATING OCCURS THIS AFTERNOON...A FEW STORMS MAY APPROACH SEVERE LIMITS THIS AFTERNOON AND EVENING WITH LARGE HAIL BEING THE PRIMARY THREAT. WILL NOT INCLUDE SEVERE IN THE ZONE FCST BUT WILL MENTION IN THE HAZARDOUS WEATHER OUTLOOK. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE LATE THIS AFTERNOON AND OVERNIGHT AS PRECIPITABLE WATER VALUES APPROACH 1.50 INCHES. WILL NOT ISSUE A FLASH FLOOD WATCH ATTM AS RAINFALL TOTALS OF 1 TO 2 INCHES ARE EXPECTED...BUT WILL INCLUDE LOCALLY HEAVY RAINFALL IN THE ZONE FCST. RAIN CHANCES WILL LESSEN SATURDAY WITH THE EXIT OF THE FIRST WAVE OF CONVECTION. THE NEXT IMPULSE AND ASSOCIATED CONVECTION WILL MOVE ACROSS THE CWFA SUNDAY NIGHT/MONDAY MORNING. WILL CONTINUE LOW POPS FOR MONDAY AND TUESDAY AS THE UPPER LOW FINALLY KICKS OUT ACROSS THE TEXAS PANHANDLE INTO OKLAHOMA. WEDNESDAY AND THURSDAY LOOK DRY ATTM WITH WEAK UPPER LEVEL RIDGING IN PLACE. A CHANCE OF SHOWERS AND THUNDERSTORMS RETURN FOR NEXT WEEKEND WITH THE APPROACH OF ANOTHER BAJA UPPER LEVEL LOW PRESSURE SYSTEM. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 73 59 76 51 / 100 70 30 20 AUSTIN BERGSTROM INTL AIRPORT 73 59 76 52 / 100 70 30 20 DEL RIO INTL AIRPORT 78 64 78 57 / 70 50 20 40 SAN ANTONIO INTL AIRPORT 73 61 76 56 / 100 70 30 20 && .EWX WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH EAST HALF OF CWA THRU 4 PM. && 08/18/13/03
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 519 AM CST FRI APR 2 2004 TXZ171>173-183>194-202>209-217>225-228-031200- ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DEWITT- 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- 519 AM CST FRI APR 2 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS SOUTH CENTRAL TEXAS AND THE HILL COUNTRY THIS AFTERNOON AND THIS EVENING AS A VIGOROUS UPPER LEVEL SYSTEM OVER BAJA CALIFORNIA SENDS OUT AN IMPULSE. LARGE HAIL WILL BE THE PRIMARY SEVERE WEATHER THREAT. LOCALLY HEAVY RAINS MAY ALSO OCCUR THIS AFTERNOON AND TONIGHT WITH RAINFALL TOTALS OF 1 TO 2 INCHES POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THUNDERSTORM ACTIVITY SHOULD SLACKEN SATURDAY BUT INCREASE AGAIN SUNDAY NIGHT INTO MONDAY MORNING. ADDITIONAL RAINS COULD LEAD TO FLASH FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND EVENING.
The Austin/San Antonio radar (KEWX), 55 km away, was scanning. The volume nearest the first event began at 16:30 UTC.
6 flash flood. Local standard time, as filed.
Thunderstorms produced general half-inch rainfall with isolated totals to 3 inches over northern Bexar and northern Medina Counties. The heaviest rain was along the northern interface of the two counties, where numerous roads were closed due to flash flooding.
Thunderstorms produced general half-inch rainfall with isolated totals to 3 inches over northern Bexar and northern Medina Counties. The heaviest rain was along the northern interface of the two counties, where numerous roads were closed due to flash flooding.
Storms produced general half-inch amounts over Comal County, with reports of nearly 3 inches near Canyon Lake. Roads near Canyon Lake were closed due to flash flooding.
Storms over Guadalupe county produced general half-inch totals, with isolated 3 inch amounts in the western part of the county. Several roads west of Seguin were closed due to high water.
Rainfall averaged nearly 1 inch in Karnes County, with totals of up to 3 inches between Falls City and Karnes City. Numerous roads were closed in central Karnes County.
Rainfall in DeWitt County averaged near one half inch. Isolated totals to 3 inches were indicated between Westhoff and Yorktown. Many rural roads were closed due to flash flooding.
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: 5390960, 5390961, 5390962, 5390963, 5391306, 5391307.