1 thunderstorm wind, as filed by the National Weather Service.
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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 Aug 21, 8:56 PM CST, 3 hours 47 minutes earlier.
SOUTH CENTRAL TEXAS FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 956 PM CDT THU AUG 21 2003 AS SUSPECTED, WILL NEED ANOTHER UPDATE TO BRING LIKELY POPS INTO AUSTIN AND SOUTHEAST ZONES AND A 40 PERCENT CHANCE FOR THE SAT/EWX AREAS. CONVECTION CONTINUES TO THRIVE OVER EAST CENTRAL AND WEST CENTRAL TX, SO FAVORED THE HIGHER POPS INTO THE NORTHERN COUNTIES. HAVE ALSO MADE SOME SLIGHT ADJUSTMENTS OF POP, TEMP, AND WIND INTO FRIDAY TO ACCOUNT FOR A MORE POTENT OUFLOW BOUNDARY PENETRATING INTO OUR CENTRAL ZONES. SOME LOCALLY HEAVY RAINFALL IS POSSIBLE OVERNIGHT, BUT CELL TRENDS SUGGEST A STEADY WESTWARD MOVEMENT AND LITTLE IN THE WAY OF TRAINING THUS NO MENTION IN ZONES. .EWX...NONE 18/13 .PREVIOUS DISCUSSION............................................. COMBINATION INCREASED MOISTURE, STEEPENING LAPSE RATES, AND THERMAL GRADIENT OVER EAST TX HAS RESULTED IN AN INCREASED CHANCE OF RAIN FOR TONIGHT. A LARGE COMPLEX OF STORMS OVER EAST TX IS HEADING WESTWARD TOWARD SC TX. LATE EVENING UPDATE MAY APPEAR ON THE CONSERVATIVE SIDE CONSIDERING THE NEAR STEADY STORM TRENDS AND THE STRENGTHENING ISOLATED STORM OVER COMMANCHE COUNTY. A MORE PESSEMISTIC UPDATE MAY FOLLOW LATER THIS EVENING. FOR NOW, BELIEVE THE LOSS OF DAYTIME HEATING WILL EVENTUALLY COOL THE STORMS AWAY FROM THE EAST TX OUTFLOW BOUNDARY AND REDUCE DIFFERENTIAL HEATING ALONG THE BOUNDARY. HAVE INCREASED POPS TO 30 PERCENT FOR EASTERN COUNTIES AND 20 PERCENT OVER THE EASTERN HILL COUNTRY AND SAT METRO AREA. IMPACTS OF THIS SYSTEM SHOULD NOT RESULT IN SIGNIFICANT CHANGES FOR THE FORECAST THINKING ON FRIDAY SO WILL LEAVE THE DAY 2 POPS AND TEMPS ALONE. MADE SOME MINOR CHANGES TO WINDS GOING INTO FRIDAY TO ACCOUNT FOR THE LARGE OUTFLOW BOUNDARY.
TXZ171>173-183>194-202>209-217>225-228-221100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 600 AM CDT THU AUG 21 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
The Austin/San Antonio radar (KEWX), 37 km away, was scanning. The volume nearest the first event began at 06:40 UTC.
1 thunderstorm wind. Local standard time, as filed.
The severe thunderstorm exited Bastrop County, still moving southwestward, and approached the town of Luling. There it produced a downburst that knocked over trees and blew down power lines.
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, August 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: 5369194.