A frontal boundary moved into a moist airmass and generated thunderstorms. Some of these storms produced heavy rain.
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.
A frontal boundary moved into a moist airmass and generated thunderstorms. Some of these storms produced heavy rain. Two to four inches of rain fell in the Salado Creek basin in northern San Antonio. This rainfall led to flash flooding.
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 31, 5:41 PM CST, 2 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Austin/San Antonio TX 641 PM CDT Sun Aug 31 2025 ...New AVIATION... .UPDATE... Flood Watch remains in effect until noon Monday. We are seeing an outflow boundary push through the area and so far we are not seeing many showers and storms form before it. Currently it has made it past New Braunfels and continues moving south down the I-35 Corridor. Most areas behind this boundary are likely to not see as much heavy rain potential as the airmass behind it stabilizes including Williamson, Burnett, and Lee counties. We now expect areas ahead of the boundary to still see heavy rainfall as instability remains which includes the Edwards Plateau and Western Hill Country and any areas south. && .KEY MESSAGES... - Locally heavy rain possible across most areas of south central Texas Sunday afternoon into Monday. Localized flooding possible. - A Flood Watch is in effect for most of south central Texas noon Sunday through noon Monday. - We dry out through the week with rain chances returning next weekend && .SHORT TERM (THROUGH MONDAY NIGHT)... Current radar imagery as of noon today shows showers and some storms backbuilding off a frontal boundary thats off a main complex near college station that continues to slide to the south and east. Meanwhile the frontal boundary continues to slide south across the area. Expect showers and storms to erupt off this boundary as it continues its crawl across the area. PWATs sitting anywhere from 1.7 up to 2 inches will make for any storms to be very efficient rainfall producers ahead of the front. As such a flood watch remains in effect for all our counties except Maverick and Dimmit counties until noon tomorrow. Widespread 1 to 2 inches with pockets of 3 to 5 inches and isolated spots up to 8 inches of rainfall is possible anywhere in the watch area. It's still too difficult to pinpoint just where exactly the heaviest rainfall will occur as we are expecting several rounds of rainfall through Monday as the front stalls over the area and continues igniting showers and storms. WPC has expanded their level 2 of 4 risk (Slight) for excessive rainfall for today into tomorrow morning for almost our entire area except southern Maverick and Dimmit counties and keeps us in a level 1 of 4 risk (Marginal) for the entire area for Monday into Tuesday. Looking at latest guidance, most depict this first round to continue pushing off to the east mainly affecting northern areas of the CWA including the Austin Metro. We should see more storms fire along the boundary this evening as they slowly move from the hill country into the I-35 Corridor. Some model guidance shows yet another round of storms and possible heavy rain forming overnight and continuing into monday morning. Time will tell with what happens but locally heavy rainfall and strong gusty winds from 40-50mph will be possible in any of the stronger storms. Remember to stay weather aware and closely monitor weather conditions throughout this holiday weekend. Temperatures will be cooler in areas that remain in the cloud cover and rain with most seeing mid to upper 80s today with low 90s for Monday. && .LONG TERM (TUESDAY THROUGH SUNDAY)... Dry weather returns on Tuesday and remains through Friday. Rain chances return just in time for next weekend as we could see moisture from a tropical system or a disturbance move over mexico and impact our area however its far too early for any specifics at this time. Temperatures will be a slightly below normal values for most locations on Tuesday with a slow warming trend forecast for the rest of the work week. && .AVIATION (00Z MONDAY THROUGH TUESDAY)... Showers and thunderstorms are moving through the San Antonio area. Storms will reduce visibility and produce wind gusts of 30-35 kts. Storms should move through the area by 02Z. Thunderstorms are also in the vicinity of DRT and will reduce visibility and produce wind gusts of 25-30 kts. Storms will be through there by 03Z. Outside of convection conditions will be VFR at all terminals. MVFR ceilings will develop in Austin and San Antonio overnight. Convection will redevelop during the daytime Monday with gusty winds being the most likely impact. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 73 90 72 95 / 30 40 10 0 Austin Bergstrom Intl Airport 73 89 71 94 / 40 40 10 10 New Braunfels Muni Airport 73 91 71 96 / 60 50 20 10 Burnet Muni Airport 71 86 69 91 / 30 40 10 0 Del Rio Intl Airport 76 90 74 96 / 70 80 30 10 Georgetown Muni Airport 72 88 69 93 / 30 40 10 0 Hondo Muni Airport 72 90 71 95 / 60 60 20 10 San Marcos Muni Airport 72 90 71 96 / 50 50 10 10 La Grange - Fayette Regional 73 89 72 93 / 40 50 10 10 San Antonio Intl Airport 74 91 74 95 / 60 60 20 10 Stinson Muni Airport 76 92 75 96 / 60 60 20 10 && .EWX WATCHES/WARNINGS/ADVISORIES... Flood Watch through Monday morning for Atascosa-Bandera- Bastrop-Bexar-Blanco-Burnet-Caldwell-Comal-De Witt-Edwards- Fayette-Frio-Gillespie-Gonzales-Guadalupe-Hays-Karnes-Kendall- Kerr-Kinney-Lavaca-Lee-Llano-Medina-Real-Travis-Uvalde-Val Verde-Williamson-Wilson-Zavala. && UPDATE... SHORT TERM...Magnussen LONG TERM...Magnussen AVIATION...05
Special Weather Statement
National Weather Service Austin/San Antonio TX
419 PM CDT Sun Aug 31 2025
TXZ188>190-312200-
Blanco TX-Gillespie TX-Kendall TX-
419 PM CDT Sun Aug 31 2025
...A strong thunderstorm will impact portions of west central Blanco,
southeastern Gillespie and northern Kendall Counties through 500 PM
CDT...
At 419 PM CDT, Doppler radar was tracking a strong thunderstorm over
Old Tunnel State Park, or 11 miles northeast of Comfort, moving east
at 15 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Stonewall, Sisterdale, Flugrath, Blumenthal, Luckenbach, Cain City,
Old Tunnel State Park, Albert, Grapetown, Rocky Hill, Bankersmith,
and Crown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3006 9892 3025 9883 3017 9843 2985 9863
TIME...MOT...LOC 2119Z 291DEG 13KT 3010 9879
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
TranSpecial Weather Statement
National Weather Service Austin/San Antonio TX
552 PM CDT Sun Aug 31 2025
TXZ189-205-206-312330-
Comal TX-Bexar TX-Kendall TX-
552 PM CDT Sun Aug 31 2025
...A strong thunderstorm will impact portions of southeastern
Kendall, north central Bexar and central Comal Counties through 630
PM CDT...
At 552 PM CDT, Doppler radar was tracking a strong thunderstorm over
Guadalupe River State Park, or 16 miles east of Boerne, moving
southeast at 20 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Canyon Lake, Bulverde, Guadalupe River State Park, Spring Branch,
Smithson Valley, Bergheim, Timberwood Park, Anhalt, Honey Creek State
Natural Area, Startzville, and Specht Store.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2981 9864 2995 9846 2982 9817 2962 9836
TIME...MOT...LOC 2252Z 294DEG 19KT 2985 9847
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
PlattThe Austin/San Antonio radar (KEWX), 62 km away, was scanning. The volume nearest the first event began at 23:42 UTC.
7 flash flood, 1 thunderstorm wind. Local standard time, as filed.
Thunderstorms produced heavy rain that led to flash flooding. The fire department closed RM 473 at Sheps Creek west of Kendalia. There was 4.5 feet of water over the road.
A thunderstorm produced wind gusts measured at 51 kts. by the ASOS at San Antonio International Airport.
Thunderstorms produced heavy rain that led to flash flooding. Bexarflood reported E. Bitters Rd. was closed at Salado Creek due to water over the road just north of San Antonio International Airport.
Thunderstorms produced heavy rain that led to flash flooding. A video on X showed southbound Hwy 281 flooded near Paseo del Norte in northern San Antonio.
Thunderstorms produced heavy rain that led to flash flooding. The bodies of two homeless individuals were recovered from Salado Creek near Maltsberger Ln. in northern San Antonio. Law enforcement officials believe they were swept away from a homeless encampment in a drainage channel near the creek.
Thunderstorms produced heavy rain that led to flash flooding. Bexarflood showed Devine Rd. closed at Olmos Creek due to water over the road.
Thunderstorms produced heavy rain that led to flash flooding. Bexarflood showed Creekview Dr. closed at Pershing Creek due to water over the road in northeastern San Antonio.
Thunderstorms produced heavy rain that led to flash flooding. Bexarflood reported Blue Wing Rd. was closed due to water over the road near Salado Creek in southeastern San Antonio.
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 |
|---|---|---|---|---|---|
| Flash Flood, Bexar | 2025-08-31 | 43 | Female | In Water | Direct |
| Flash Flood, Bexar | 2025-08-31 | 52 | Male | In Water | Direct |
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2025Every state in 2025This day in weather historyWarnings in Texas, August 2025
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: 1290904, 1290931, 1290910, 1290917, 1290922, 1290925, 1290927, 1290930.