Subtropical high pressure over the southern United States brought a warm, moist airmass over South Central Texas. This combination led to high temperatures in the lower 90s and dew point temperatures in the lower 70s with heat indices near 100.
Every event with a place to put it; 1 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 episode as NWS EWX wrote it up.
Subtropical high pressure over the southern United States brought a warm, moist airmass over South Central Texas. This combination led to high temperatures in the lower 90s and dew point temperatures in the lower 70s with heat indices near 100.
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 15, 5:06 PM CST, 54 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 606 PM CDT THU JUL 15 2010 .AVIATION... VFR CONDITIONS WILL PREVAIL THIS EVENING AS THE WARM MOIST SOUTH TO SOUTHEAST LOW LEVEL WINDS PERSISTS. MVFR CIGS WILL DEVELOP AT THE I-35 TERMINALS 05Z TO 07Z...MOVING INTO KDRT BY 12Z. CIGS WILL IMPROVE TO VFR AFTER 15Z AT THE I-35 TERMINALS...AFTER 17Z AT KDRT. SFC WINDS WILL BE SOUTH TO SOUTHEAST AT 5 TO 15 KTS FOR THE NEXT 24 HOURS. && .PREV DISCUSSION... /ISSUED 308 PM CDT THU JUL 15 2010/ DISCUSSION... 12Z UPPER AIR DATA SHOWED THE UPPER HIGH ANCHORED OVER CENTRAL TEXAS WITH 500MB HEIGHTS AROUND 596DAM. THE UPPER HIGH CENTER IS FORECAST TO MOVE TO OVER THE FOUR CORNERS AREA TOMORROW...THEN STRETCH AND FLATTEN-OUT ACROSS THE SOUTHERN HALF OF THE U.S. OVER THE WEEKEND. 500MB PRESSURE HEIGHTS ARE FORECAST TO DECREASE TO BETWEEN 591-593DAM BY LATE SUNDAY INTO MONDAY AS THE UPPER HIGH SHIFTS EAST TO OVER THE DEEP SOUTH. ISOLATED AFTERNOON SEABREEZE- INITIATED CONVECTION IS POSSIBLE BEGINNING SUNDAY OVER OUR EASTERN-MOST COUNTIES AND THIS PATTERN WILL PREVAIL INTO THE MIDDLE OF NEXT WEEK AND EXPAND SLIGHTLY WESTWARD AS SOUTH TEXAS REMAINS ON THE PERIPHERY OF THE UPPER HIGH. CONVECTION IS NOT FORECAST TO MAKE IT TO THE I-35 CORRIDOR SUNDAY THROUGH NEXT WEEK DUE TO LOWER INLAND PWATS AND SMALLER LAPSE RATES. TEMPERATURES ARE FORECAST TO BE AT OR SLIGHTLY ABOVE NORMAL THROUGH THE FORECAST CYCLE WITH AFTERNOON HEAT INDICES BETWEEN 100-105. A FEW SPOTS MAY REACH UP TO NEAR A 107 HEAT INDEX OVER THE NEXT COUPLE OF DAYS. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 77 98 76 99 77 / 0 0 0 - - AUSTIN BERGSTROM INTL AIRPORT 74 97 73 98 74 / 0 0 0 - - NEW BRAUNFELS MUNI AIRPORT 76 98 73 99 74 / 0 0 0 - - BURNET MUNI AIRPORT 75 97 74 97 75 / 0 0 0 0 0 DEL RIO INTL AIRPORT 77 97 77 99 76 / 0 0 0 0 0 GEORGETOWN MUNI AIRPORT 76 97 75 98 76 / 0 0 0 - - HONDO MUNI AIRPORT 75 97 73 97 73 / 0 0 0 0 0 SAN MARCOS MUNI AIRPORT 75 98 74 98 76 / 0 0 0 - - LA GRANGE - FAYETTE REGIONAL 76 96 76 96 76 / 0 0 0 10 - SAN ANTONIO INTL AIRPORT 77 97 76 97 76 / 0 0 0 - - STINSON MUNI AIRPORT 76 98 75 98 75 / 0 0 0 - - && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 18/01
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 528 PM CDT THU JUL 15 2010 TXZ171>173-183>194-202>209-217>225-228-161145- 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- 528 PM CDT THU JUL 15 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TONIGHT... FLOOD WARNINGS REMAIN IN EFFECT FOR THE RIO GRANDE. MODERATE FLOODING WILL CONTINUE AT DEL RIO. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... FLOODING WILL CONTINUE ON THE RIO GRANDE WITH MODERATE FLOODING AT DEL RIO. THE RIVER LEVEL WILL REMAIN STEADY IN THE MODERATE FLOOD CATEGORY THROUGH SUNDAY. OTHERWISE NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The national radar mosaic for the moment the first event began.
1 heat. Local standard time, as filed.
A man was found dead in his trailer home in Del Rio. The high temperature was 93 degrees and the heat index reached around 100.
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Heat, Val Verde | 2010-07-15 | 79 | Male | Mobile/Trailer Home | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2010Every state in 2010This day in weather historyWarnings in Texas, July 2010
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: 234601.