Thunderstorms associated with a persistent upper level low produced heavy rain and flash flooding through the morning on July 21.
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 associated with a persistent upper level low produced heavy rain and flash flooding through the morning on July 21.
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 Jul 20, 10:26 PM CST, 3 hours 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1126 PM CDT FRI JUL 20 2007 .AVIATION... AGAIN LITTLE CHANGE OVER THE NEXT 24 HOURS. A VERY MOIST TROPICAL AIRMASS WILL RESULT IN SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ACROSS SOUTH CENTRAL TEXAS TAF SITES. THIS WILL MAINTAIN WIDESPREAD MVFR-IFR CIGS...MVFR VSBYS AND ISOLATED LIFR CIGS AND IFR VSBYS. WINDS WILL BE VARIABLE SOUTH AT LESS THAN 10 KTS. && .PREV DISCUSSION... /ISSUED 917 PM CDT FRI JUL 20 2007/ UPDATE... SHOWERS HAVE DISSIPATED NORTH AND EAST OF A LINE FROM JUNCTION TO KERRVILLE TO SAN ANTONIO TO KENEDY AND I HAVE LOWERED THE POPS IN THIS AREA FOR THE REST OF THE EVENING. SHOWERS AND THUNDERSTORMS CONTINUE IN THE WESTERN HALF OF THE CWA. TEMPERATURES HAVE DROPPED IN THE WAKE OF SHOWERS IN SOME PLACES AND HAVE ADJUSTED MIN AND HOURLY TEMPS AS NECESSARY. WILL TAKE A CLOSER LOOK AT THE AFTER MIDNIGHT PERIOD DURING THE NEXT COUPLE OF HOURS. FOR NOW WILL LEAVE IT AS IT IS. PREV DISCUSSION... /ISSUED 612 PM CDT FRI JUL 20 2007/ UPDATE... HEAVY RAIN HAS SHIFTED TO THE WEST...SO WE HAVE EXPANDED THE FLASH FLOOD WATCH TO INCLUDE THE SOUTHWESTERN COUNTIES. NEW ZONES WILL BE OUT SHORTLY. PREV DISCUSSION... /ISSUED 428 PM CDT FRI JUL 20 2007/ DISCUSSION... HEAVY RAIN EVENT SHOWING HIGHEST TOTALS CLOSE TO WHERE MODEL QPF LOCATIONS WERE PROJECTED FROM THE MORNING RUNS, BUT ROUGHLY 3 TIMES THE AMOUNTS. HIGHEST THREATS WILL AFFECT ALONG AND 40 MILES EITHER SIDE OF I-10 N OF SAT AND I-37 S OF SAT WHERE UP TO 5 INCHES OF RAIN IS POSSIBLE. TRENDS ARE SLOWLY FALLING FOR THE WIDESPREAD HEAVY RAIN PATTERN THAT TOOK AIM ON GUADALUPE, WILSON, AND HAYES COUNTIES WHERE A THICK AREA OF STRATIFORM RAINS CONTINUE TO PRODUCE RATES AROUND HALF AN INCH PER HOUR. EXPECT A GRADUAL DECREASE THROUGH THE EVENING, BUT DO NOT FEEL THE AIR WILL BECOME STABLE ENOUGH TO WARRANT A LOWERING OF OVERNIGHT POPS OR ANY CHANGES TO THE WATCH AREA. FLOOD THREAT WILL TEMPORARILY AFFECT FRIO COUNTY, BUT THE SANDY SOILS OVER THE WINTER GARDENS SHOULD BE ABLE TO HANDLE 2-3 INCH RAINS. THUS FFA AREA AND VALID TIME SHOULD HOLD FOR NOW. THE FORECAST FOR TOMORROW SHOWS CONTINUED HIGH POPS WITH EMPHASIS ON THE WESTERN COUNTIES, BUT THE RAINFALL POTENTIAL MAY MODIFY BASED ON WHAT HAPPENS WITH THE CONVECTIVE ENVIRONMENT TONIGHT. WITH THE MOST UNSTABLE AIR SHIFTING WITH THE COOL OUTFLOW TOWARD THE RIO GRANDE, EXPECT A RAIN ENVIRONMENT MORE LIKE THAT OF TUESDAY AND WEDNESDAY, WITH PWAT VALUES DROPPING BACK TO BELOW 2 INCHES, BUT STILL REMAINING ABOVE 1.8 INCHES. MODELS SHOW AN INCREASED RIDGE INFLUENCE ALOFT FOR SUNDAY BUT THE MID LEVEL SUPPORT CONTINUES TO SUPPORT MAINLY DAYTIME RAINS. ADDITIONAL ENERGY FROM MID LEVEL COOLING AND NORTH WINDS ALOFT SHOULD ENABLE MORE RAINS TO PERSIST INTO MUCH OF NEXT WEEK. THE EXTENDED CONTINUES TO SHOW AN UNSETTLED PATTERN WITH MOST MODEL DATA KEEPING THE UPPER RIDGE FORCED TO THE NORTH AND WEST OF TEXAS. SINCE THERE REMAINS A GOOD CHANCE OF RAIN EACH DAY WITH THIS PATTERN, THE EMPHASIS FALLS ON THE BEST CHANCE OF A DRY DAY, AND THIS WOULD APPEAR TO BE TUESDAY. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 72 88 74 91 74 / 70 60 30 30 20 AUSTIN BERGSTROM INTL AIRPORT 70 87 72 91 70 / 70 60 30 30 20 DEL RIO INTL AIRPORT 74 87 75 93 75 / 70 90 50 20 20 SAN ANTONIO INTL AIRPORT 71 87 74 91 73 / 70 70 30 20 20 && .EWX WATCHES/WARNINGS/ADVISORIES... FLASH FLOOD WATCH UNTIL 7 AM CDT SATURDAY FOR THE FOLLOWING ZONES: 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. && 05/01
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 401 AM CDT FRI JUL 20 2007 TXZ171>173-183>194-202>209-217>225-228-211115- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE- MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA- FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT- 401 AM CDT FRI JUL 20 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... OCCASIONAL RAIN WITH A CHANCE OF SHOWERS AND THUNDERSTORMS IS EXPECTED TODAY THROUGH THE EVENING ACROSS SOUTH CENTRAL TEXAS AND THE HILL COUNTRY. LOCALLY HEAVY RAIN IS POSSIBLE. THIS MAY LEAD TO LOCALIZED FLOODING OF FLOOD PRONE AREAS. .DAY TWO...SATURDAY... A MOIST AIRMASS WILL REMAIN OVER SOUTH CENTRAL TEXAS. THIS WILL LEAD TO A GOOD CHANCE FOR SHOWERS AND THUNDERSTORMS ACROSS SOUTH CENTRAL TEXAS SATURDAY. THESE STORMS WILL PRODUCE LOCALLY HEAVY RAINFALL WHICH MAY CAUSE FLASH FLOODING. .DAY THREE...SUNDAY... THERE IS A SLIGHT CHANCE FOR SHOWERS AND THUNDERSTORMS OVER THE WEST PART OF SOUTH CENTRAL TEXAS TO A CHANCE OF SHOWERS AND THUNDERSTORMS OVER THE EAST PART OF THE AREA. SOME LOCALLY HEAVY RAIN IS POSSIBLE. .DAYS FOUR THROUGH SEVEN...MONDAY THROUGH THURSDAY... A FAIRLY WET JULY PATTERN WILL CONTINUE WITH A CHANCE OF MAINLY DAYTIME TO EVENING SHOWERS AND THUNDERSTORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
The Austin/San Antonio radar (KEWX), 55 km away, was scanning. The volume nearest the first event began at 07:29 UTC.
13 flash flood, 4 flood, 1 tornado. Local standard time, as filed.
Thunderstorms produced from 2 to 3 inches of rain over Hays County, with up to 6 inches near Wimberley. FM12, FM150, FM3237, and FM32 were closed due to high water.
Extremely heavy rainfall was reported from eastern Bandera County into northern Medina County. A general 3 to 5 inch rainfall was reported from persistent, nearly stationary thunderstorms in the northwest quarter of Medina County, with up to 12 inches inside the county just south of Tarpley. Highest totals were 17 inches just north of D'Hanis. More than 300 people were evacuated along Hondo Creek, Seco Creek and Verde Creek. Some were snatched from the roofs of their homes by helicopters. Nearly all roads in the north and east halves of the county were closed. Seco Creek overflowed in D'Hanis causing widespread damage to over 100 homes and businesses. Some buildings had up to 4 feet of water in them. Six homes were completely destroyed. Damage to roads and bridges was estimated at around $1.3 million.
Extremely heavy rainfall was reported from eastern Bandera County into northern Medina County. Most parts of eastern Bandera County reported 3 to 4 inches of rain, but the highest amount was in Bandera where up to 8 inches fell. Flash flooding was both widespread and severe, closing SH16, SH173, FM1283 and FM470.
Thunderstorms near midnight produced between 3 and 4 inches of rain from Sattler northeastward to the Hays County line. Flash flooding closed FM306 and FM32.
Generally from 2 to 3 inches of rain fell in the early morning hours. Highest totals were 4 inches near Hochheim. US77 and US183 were closed due to flash flooding near Hochheim.
Between 2 and 3 inches of rain fell in central Guadalupe County, with up to 5 inches just south of Kingsbury. FM477, FM466, and Alternate US90 were closed.
A general rainfall of 2 to 3 inches was reported in western Gonzales County, with up to 5 inches near Leesville. US80 and FM466 were closed.
Rainfall over the northern part of Uvalde County averaged from 4 to 6 inches, with up to 12 inches from northwest of Uvalde to Utopia. High water shut down a 36-mile stretch of tracks around Knippa, halting a westbound Amtrak train with 176 passengers for several hours. SH127, FM1050, and SH55 were closed due to high water and Garner State Park was evacuated due to flooding.
Virtually the entire county received between 2 and 4 inches of rainfall. Highest totals were 8 inches between Sisterdale and Boerne. Nearly all rural roads in Kendall County were shut down due to the flash flooding.
Bull Creek at Loop 360 crested at 6.6 ft on July 21 at 0430cst, where flood stage is 5 ft.
Seco Creek at Ranch Rowe near D'Hanis crested at 32.4 ft on 07/21 at 0715cst, where flood stage is 15 ft.
At approximately 4:25 am CST a tornado estimated to be an EF-2 touched down about 9 miles south of Seguin and 1/4 mile southeast of CR411. The tornado moved northward along SH123 for nearly 1 mile before turning slightly to the north northwest and crossing CR410. It damaged three outbuildings, a residence and a store, but no one was injured. The tornado ranged in width from 50 yards up to 150 yards. The total track length was approximately 2 miles.
General 2 to 3 inch rain totals fell over northwest Bexar County, with up to 6 inches near Shavano Park. Most low areas and at least two dozen roads in northwest Bexar County were closed due to flash flooding. More than twenty high water rescues were completed. In one case, a vehicle carrying two young men and two young women was washed off a road into Leon Creek. The occupants climbed into trees and clung to branches for several hours until they were finally rescued by boats.
Between 3 and 4 inches of rain fell northeast of Eagle Pass, with highest amounts near 6 inches. FM481 was closed due to high water.
Hondo Creek near Tarpley crested at 22.9 ft on 07/21 at 0700cst, where flood stage is 15 ft.
San Marcos below Luling crested at 31.3 ft on 07/21 at 1300cst, where flood stage is 25 ft.
From 3 to 5 inches fell in the southeast quarter of Gillespie County, with the heaviest rain just southeast of Fredericksburg. US87 and FM1376 were closed.
From 3 to 5 inches of rain fell west of Mountain Home on the early morning of July 21. Flash flooding closed SH41 and FM1340 through the late morning.
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, July 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: 49438, 49440, 49443, 49444, 49447, 49448, 49449, 49455, 49457, 49458, 49828, 49465, 49469, 49474, 49476, 49478, 49480, 49488.