Thunderstorms developed across the Texas Hill Country in the form of short-lived lines and a few supercells.
Every event with a place to put it. 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 episode as NWS EWX wrote it up.
Thunderstorms developed across the Texas Hill Country in the form of short-lived lines and a few supercells.
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 30, 11:00 PM CST, 1 hour 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1200 AM CDT TUE MAY 1 2007 .AVIATION...I-35 CORRIDOR TERMINALS IFR CIGS THROUGH 14Z WITH SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING AROUND 08Z LOCALLY LOWERING VSBYS AT OR BELOW 3 MILES. ACTIVITY EXPECTED TO REMAIN AROUND THE I-35 CORRIDOR TIL AROUND 15Z. CONDS IMPROVING TO MVFR CIGS AFT 15Z AND VFR AFT 19Z. KDRT TERMINAL MVFR CONDITIONS EXPECTED TIL 16Z BECOMING VFR. SOUTHEAST WINDS EXPECTED ALL TERMINALS FROM 10 TO 15 KTS. && .PREV DISCUSSION... /ISSUED 921 PM CDT MON APR 30 2007/ UPDATE... HAVE CANCELED THE FLASH FLOOD WATCH FOR OUR WESTERN COUNTIES. AN UPPER LEVEL LOW PRESSURE SYSTEM WAS LOCATED OVER THE TEXAS PANHANDLE MOVING EAST. AN UPPER LEVEL DISTURBANCE WILL ROTATE AROUND THE UPPER LOW AND MOVE ACROSS THE CWFA OVERNIGHT. THIS FEATURE IS EXPECTED TO TRIGGER ANOTHER ROUND OF CONVECTION ACROSS THE WATCH AREA. THE MCS OVER THE LOWER VALLEY HAS CUT OFF THE GULF LOW LEVEL FLOW ALONG THE RIO GRANDE VALLEY. THIS WILL INHIBIT THE REDEVELOPMENT OF CONVECTION ACROSS THAT REGION. HOWEVER LOW LEVEL GULF INFLOW MAY BECOME RE-ESTABLISHED MAINLY NORTH OF HIGHWAY 281...SO STILL THE POTENTIAL OF ADDITIONAL HEAVY RAINFALL AS THE DISTURBANCE MOVES ACROSS THE CWFA. ALSO ISOLATED SVR TSTMS WILL STILL BE POSSIBLE OVERNIGHT FOR LLANO...BURNET AND WILLIAMSON COUNTIES...DUE TO THEIR PROXIMITY TO THE UPPER LEVEL LOW. UPDATES ISSUED. PREV DISCUSSION... /ISSUED 704 PM CDT MON APR 30 2007/ AVIATION...I-35 CORRIDOR TERMINALS MVFR CIGS THROUGH 14Z WITH SCATTERED SHOWERS AND THUNDERSTORMS DEVELOPING AROUND 08Z LOCALLY LOWERING VSBYS AT OR BELOW 3 MILES. ACTIVITY EXPECTED TO REMAIN AROUND THE I-35 CORRIDOR TIL AROUND 15Z. CONDS IMPROVING TO VFR AFT 15Z. KDRT TERMINAL VFR CONDITIONS EXPECTED TIL 08Z BECOMING MVFR WITH CONDITIONS IMPROVING TO VFR AFT 14Z. SOUTHEAST WINDS EXPECTED ALL TERMINALS FROM 10 TO 15 KTS. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 72 66 80 67 85 / 80 50 50 40 20 AUSTIN BERGSTROM INTL AIRPORT 70 67 80 66 85 / 80 40 50 40 20 DEL RIO INTL AIRPORT 81 70 86 69 89 / 60 10 20 20 20 SAN ANTONIO INTL AIRPORT 69 68 82 69 85 / 80 30 30 20 20 && .EWX WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH THROUGH TUESDAY MORNING FOR THE FOLLOWING ZONES: BANDERA...BASTROP...BEXAR...BLANCO...BURNET...CALDWELL...COMAL...DE WITT...FAYETTE...GILLESPIE...GONZALES...GUADALUPE...HAYS...KARNES... KENDALL...KERR...LAVACA...LEE...LLANO...TRAVIS...WILLIAMSON... WILSON. && 13/02
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 923 PM CDT MON APR 30 2007 TXZ171>173-186>194-205>209-221>225-020230- LLANO-BURNET-WILLIAMSON-KERR-BANDERA-GILLESPIE-KENDALL-BLANCO- HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE- WILSON-KARNES-GONZALES-DE WITT-LAVACA- 923 PM CDT MON APR 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS MAINLY THE NORTHERN PORTIONS OF SOUTH CENTRAL TEXAS GENERALLY ENCOMPASSING BURNET AND WILLIAMSON COUNTIES. A DISTURBANCE IS EXPECTED TO SWEEP ACROSS THE NORTHEAST HALF OF SOUTH CENTRAL TEXAS OVERNIGHT WITH A REDEVELOPMENT OF SHOWERS AND THUNDERSTORMS. SOME OF THESE STORMS ACROSS THE NORTHEASTERN TIER OF SOUTH CENTRAL TEXAS MAY BECOME SEVERE WITH DAMAGING WINDS AND LARGE HAIL. A FLASH FLOOD WATCH IS IN EFFECT FOR THAT PART OF SOUTH CENTRAL TEXAS GENERALLY EAST OF A LINE FROM MOUNTAIN HOME TO KARNES CITY. DUE TO THE RECENT RAINS OF TODAY, FURTHER DEVELOPMENT OF LOCALLY HEAVY RAINS WILL RESULT IN RAPID RUNOFF AND RESULTANT FLASH FLOODING, PARTICULARLY OVER LOW LYING OR FLOOD PRONE AREAS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE CHANCE FOR HEAVY RAINFALL AND ISOLATED SEVERE THUNDERSTORMS WILL CONTINUE THROUGH WEDNESDAY. THERE IS A SLIGHT RISK OF SEVERE WEATHER FOR MUCH OF SOUTH CENTRAL TEXAS TUESDAY...AND LOCALLY HEAVY RAINFALL WILL BE POSSIBLE THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED OVERNIGHT. TXZ183>185-202>204-217>220-228-020230- VAL VERDE-EDWARDS-REAL-KINNEY-UVALDE-MEDINA-MAVERICK-ZAVALA-FRIO- ATASCOSA-DIMMIT- 923 PM CDT MON APR 30 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TONIGHT HAZARDOUS WEATHER IS NOT EXPECTED. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE CHANCE FOR HEAVY RAINFALL AND ISOLATED SEVERE THUNDERSTORMS WILL CONTINUE THROUGH WEDNESDAY. THERE IS A SLIGHT RISK OF SEVERE WEATHER FOR MUCH OF SOUTH CENTRAL TEXAS TUESDAY...AND LOCALLY HEAVY RAINFALL WILL BE POSSIBLE THROUGH WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
712 PM CDT MON APR 30 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0635 PM FLASH FLOOD CUERO 29.09N 97.29W
04/30/2007 DEWITT TX LAW ENFORCEMENT
NUMEROUS ROADS FLOODED/CLOSED IN COUNTY
0700 PM FLASH FLOOD 3 NE YOAKUM 29.32N 97.11W
04/30/2007 LAVACA TX LAW ENFORCEMENT
HIGH WATER RESCUE ON COUNTY ROAD 420
&&
JPBThe Austin/San Antonio radar (KEWX), 99 km away, was scanning. The volume nearest the first event began at 06:01 UTC.
2 hail, 2 flash flood, 1 flood, 1 tornado. Local standard time, as filed.
Guadalupe River at Cuero crested at 31.74 ft at 0345 CST on May 1, where flood stage is 24 ft.
Hail broke the windshield of a DPS trooper just northwest of Llano.
Thunderstorms through the late afternoon produced a general rainfall of 1 to 2 inches over western Llano and Gillespie Counties. Up to 4 inches fell in the area from Castell to the Gillespie County line. Rural roads in west and southwest Llano County were closed, including FM152 at the Llano River.
A small tornado reported by a trained Skywarn spotter and chaser. The tornado touched down in an open area for about two minutes, then lifted and dissipated. No damage occurred.
Thunderstorms through the late afternoon produced a general rainfall of 1 to 2 inches over western Llano and Gillespie Counties. Up to 4 inches fell just east of Harper. Flash flooding closed roads across northwest Gillespie County through the late night, including FM648.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2007Every state in 2007This day in weather historyThe tornado archive for Texas, 2007Warnings in Texas, May 2007
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: 34541, 33309, 33310, 33311, 33312, 33313.