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 Brownsville, TX wrote its last area forecast discussion before the first event at Sep 12, 2:45 AM CST, 2 hours earlier.
DEEP SOUTH TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE BROWNSVILLE TX 345 AM CDT FRI SEP 12 2003 SHORT TERM...SATELLITE AND RADAR IMAGES INDICATE A BAND OF SHOWERS AND THUNDERSTORMS MOVING ACROSS THE RIO GRANDE PLAINS TOWARDS THE CWA THIS MORNING. HEAVY RAINFALL APPEARS THE GREATEST THREAT FROM THIS CONVECTION WITH MOIST AND UNSTABLE AIRMASS ACROSS THE LOWER RIO GRANDE VALLEY. WITH 500MB TROUGH OVER NORTHWEST TEXAS TODAY...CONVECTION SHOULD CONTINUE TO DEVELOP WHERE OUTFLOW BOUNDARY COLLIDES WITH ABUNDANT MOISTURE OVER SOUTH TX. CONVECTIVE BOUNDARY PROGGED TO MOVE THROUGH DEEP SOUTH TX TONIGHT. WILL HOLD OFF ON FLASH FLOOD WATCH ATTM BUT WILL WORD ZONES WITH LOCALLY HEAVY RAINFALL POSSIBLE TODAY AND TONIGHT FOR NOW. WILL HAVE TO SEE HOW MUCH RAINFALL FALLS ACROSS THE AREA AND ASSESS THE POTENTIAL OF SHOWERS AND THUNDERSTORMS REDEVELOPING THIS AFTERNOON AND TONIGHT. .MARINE...WILL MAINTAIN THE SCA FOR THE OFFSHORE WATERS AS A SQUALL LINE IS PROGGED TO MOVE THROUGH BY MIDMORNING. THE MAIN THREAT WILL BE THE STRONG GUSTY WINDS...LIGHTNING AND BRIEF HEAVY DOWNPOURS. SEAS ARE BELOW 7 FEET AND WILL NOT HAVE AN OPPORTUNITY TO SIGNIFICANTLY RESPOND TO THE WINDS. SCATTERED SHOWERS WILL CONTINUE OVER THE COASTAL WATERS INTO THE WEEKEND WITH IMPROVING CONDITIONS AFTER THAT. .AVIATION...THE MAIN CONCERN TODAY WILL BE A SQUALL LINE EXPECTED TO MOVE THROUGH NEAR DAYBREAK OR EARLY MORNING. IFR CONDITIONS WILL BE POSSIBLE IN AND NEAR STRONG THUNDERSTORMS ASSOCIATED WITH THE SQUALL LINE. AREAS OF CONTINUED CONVECTION AND RAINFALL MAY IMPACT THE BRO AIRPORT WITH MVFR CONDITIONS THROUGH EARLY SATURDAY. EXTENDED...MODELS CONTINUE TO DIVERGE SATURDAY AS THE SHORTWAVE TROUGH OVER NORTH TX LIFTS NORTHEAST. THE WEAK FRONTAL BOUNDARY OVER CENTRAL TX WASHES OUT ACCORDING TO THE ETA WITH SOUTHEAST WINDS PREVAILING THROUGH SUNDAY. THE GFS BRINGS A SECONDARY BOUNDARY INTO SOUTH TX SAT NIGHT WITH WINDS BACKING TO THE EAST AND NORTHEAST SUNDAY. ALSO THE GFS PROGS ADDITIONAL CONVECTION DEVELOPING ACROSS THE LOWER RIO GRANDE VALLEY. WILL LEAN TOWARDS THE ETA SOLN FOR NOW BUT WILL HAVE TO BLEND THE GFS SOLN WITH THE ETA SUNDAY AND SCALE BACK ON RAIN CHANCES ACCORDINGLY SUNDAY AND MONDAY. HIGH PRESSURE SETTLING OVER THE EASTERN U.S. TUESDAY SHOULD PROVIDE AN EAST TO SOUTHEAST FLOW THROUGH THE REST OF THE PERIOD. .BRO WATCHES/WARNINGS/ADVISORIES...SCA FOR GMZ130-150-155-170-175. .PRELIMINARY POINT/TEMPS/POPS... BROWNSVILLE EE 090/078 090/080 088 40/40/20/20/40 HARLINGEN EE 091/077 091/079 089 40/40/20/20/40 MCALLEN EE 092/078 092/080 090 40/40/20/20/40 RIO GRANDE CITY EE 093/076 093/078 092 40/40/20/20/40 SOUTH PADRE ISLAND EE 088/079 088/081 086 40/40/20/20/40 SYNOPTIC-GRIDS...CASTILLO/MARINE-AVIATION-MESO...MILLER THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT: HTTP://WWW.SRH.NOAA.GOV/BRO
TXZ248>257-121100- HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE BROWNSVILLE TX 109 AM CDT FRI SEP 12 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS. .DAY ONE...REST OF TONIGHT. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL ACCOMPANY A SQUALL LINE MOVING SOUTH INTO DEEP SOUTH TEXAS EARLY FRIDAY MORNING. HAZARDS WILL BE FREQUENT LIGHTNING...STRONG GUSTY STRAIGHT LINE WINDS OF 35 MPH...AND LOCALLY HEAVY RAINFALL OF ONE QUARTER TO ONE HALF AN INCH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH THURSDAY. LINGERING CONVECTION WILL PERSIST BUT DIMINISH THROUGH SATURDAY AND SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AFTER SATURDAY THROUGH THE END OF THE FORECAST PERIOD. .SPOTTER INFORMATION STATEMENT... EMERGENCY MANAGERS AND SPOTTERS SHOULD MONITOR THE DEVELOPING WEATHER SITUATION TODAY. SKYWARN SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY.
The Corpus Christi radar (KCRP), 185 km away, was scanning. The volume nearest the first event began at 10:47 UTC.
2 flash flood. Local standard time, as filed.
Heavy rains led to flash flooding of U.S. Highway 83 near Zapata, with arroyos adjacent to the roadway running full. Substantial flooding of roadways was also reported in the City of Zapata.
Heavy rains led to flash flooding of streets in the Chihuahua area, making passing difficult. No flooding of homes or businesses was reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2003Every state in 2003This day in weather historyWarnings in Texas, September 2003
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: 5327736, 5327737.