Alert archive / Texas / Flash Flood Warnings in 2026
Flash Flood Warning 50, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 11, 2026, 12:50 PM CDT for Bexar County, Texas. It was in force for 5 hr. 3 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 11, 2026, 12:50 PM CDT (17:50 UTC)
- Expired
- Jul 11, 2026, 6:00 PM CDT
- In force
- 5 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 63 km from the middle of the area, began a volume at 17:51 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 11, 1:29 PM CDT | FLASH FLOOD | 3 W Shavano Park, TX | Report from mPING of Street/road flooding. |
| Jul 11, 1:30 PM CDT | FLASH FLOOD | 2 Se Cross Mountain, TX | Bexar Flood reported numerous low water crossings closed in western Bexar County including several along Culebra Creek and Leon Creek. |
| Jul 11, 1:42 PM CDT | FLASH FLOOD | 4 E Helotes, TX | Report from mPING of Street/road flooding on Babcock Rd along Maverick Creek. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this flash flood warning; the first came 39 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 5.8 hours before the alert went out and 212 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1765 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 602 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
686
WGUS54 KEWX 111750
FFWEWX
TXC029-112300-
/O.NEW.KEWX.FF.W.0050.260711T1750Z-260711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
1250 PM CDT Sat Jul 11 2026
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
Northwestern Bexar County in south central Texas...
* Until 600 PM CDT.
* At 1250 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 1 to 3 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
San Antonio, Leon Valley, Helotes, Fair Oaks Ranch, Shavano Park,
Cross Mountain, Government Canyon State Natural Area, Sea World,
Leon Springs, The Dominion, Grey Forest, Fiesta Texas, San
Geronimo and Scenic Oaks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2933 9880 2969 9881 2972 9878 2972 9874
2972 9873 2973 9873 2973 9872 2974 9870
2974 9866 2975 9866 2975 9865 2974 9864
2974 9862 2974 9861 2974 9860 2975 9860
2974 9858 2975 9857 2952 9856 2937 9867
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MM3 follow-up statements
970
WGUS74 KEWX 111841
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
141 PM CDT Sat Jul 11 2026
TXC029-112300-
/O.CON.KEWX.FF.W.0050.000000T0000Z-260711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-
141 PM CDT Sat Jul 11 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
FOR NORTHWESTERN BEXAR COUNTY...
At 141 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between 2
and 3 inches of rain have fallen. Additional rainfall amounts of 1
to 3 inches are possible in the warned area. Flash flooding is
already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges. HADS gauge northwest of Leon
Valley have reported between 2-3 inches of rain in the
past hour.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
San Antonio, Leon Valley, Helotes, Fair Oaks Ranch, Shavano Park,
Cross Mountain, Government Canyon State Natural Area, Sea World,
Leon Springs, The Dominion, Grey Forest, Fiesta Texas, San
Geronimo and Scenic Oaks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 2933 9880 2969 9881 2972 9878 2972 9874
2972 9873 2973 9873 2973 9872 2974 9870
2974 9866 2975 9866 2975 9865 2974 9864
2974 9862 2974 9861 2974 9860 2975 9860
2974 9858 2975 9857 2952 9856 2937 9867
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MM676
WGUS74 KEWX 112152
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
452 PM CDT Sat Jul 11 2026
TXC029-112300-
/O.CON.KEWX.FF.W.0050.000000T0000Z-260711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-
452 PM CDT Sat Jul 11 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 PM CDT THIS EVENING
FOR NORTHWESTERN BEXAR COUNTY...
At 452 PM CDT, Heavy rain has ended, but between 2 and 3 inches of
rain have fallen. Additional rainfall amounts up to 0.5 inches are
possible in the warned area. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
San Antonio, Leon Valley, Helotes, Fair Oaks Ranch, Shavano Park,
Cross Mountain, Government Canyon State Natural Area, Sea World,
Leon Springs, The Dominion, Grey Forest, Fiesta Texas, San
Geronimo and Scenic Oaks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 2933 9880 2969 9881 2972 9878 2972 9874
2972 9873 2973 9873 2973 9872 2974 9870
2974 9866 2975 9866 2975 9865 2974 9864
2974 9862 2974 9861 2974 9860 2975 9860
2974 9858 2975 9857 2952 9856 2937 9867
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
05860
WGUS74 KEWX 112253
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
553 PM CDT Sat Jul 11 2026
TXC029-112303-
/O.EXP.KEWX.FF.W.0050.000000T0000Z-260711T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-
553 PM CDT Sat Jul 11 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM CDT THIS EVENING FOR
NORTHWESTERN BEXAR COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
&&
LAT...LON 2933 9880 2969 9881 2972 9878 2972 9874
2972 9873 2973 9873 2973 9872 2974 9870
2974 9866 2975 9866 2975 9865 2974 9864
2974 9862 2974 9861 2974 9860 2975 9860
2974 9858 2975 9857 2952 9856 2937 9867
$$
05What forecasters said that day
The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Jul 11, 12:06 PM CDT, 44 minutes earlier. Its key messages:
- Updated at 1203 PM CDT Sat Jul 11 2026
- Isolated to scattered showers and thunderstorms today with near normal high temperatures.
- Daily rain chances could lead to cumulative heavy rainfall totals over 3 inches by Tuesday.
Area forecast discussion, Jul 11, 12:06 PM CDT, 44 minutes before
Area Forecast Discussion National Weather Service Austin/San Antonio TX 1206 PM CDT Sat Jul 11 2026 ...New AVIATION (18Z TAFS)... .KEY MESSAGES... Updated at 1203 PM CDT Sat Jul 11 2026 - Isolated to scattered showers and thunderstorms today with near normal high temperatures. - Daily rain chances could lead to cumulative heavy rainfall totals over 3 inches by Tuesday. && .SHORT TERM... (Today through Sunday) Issued at 137 AM CDT Sat Jul 11 2026 Upper air analysis this evening shows a weakness in the subtropical ridge over Texas. The low level flow continues to be from the southeast across South-Central Texas. The airmass over our CWA has been disrupted by convection Friday afternoon and evening. It has mainly affected the temperatures, but the effect has been temporary with brief cooling from showers. The background airmass is still hot and moist. The upper ridge will shift to the northern plains during the short term leaving weak flow over Texas. With the hot, moist airmass being conditionally unstable, isolated to scattered showers and thunderstorms will be possible both today and Sunday. Models suggest an upper shortwave today will bring better chances for convection moving from the coast to the west through the day and evening. While overall rainfall totals will be modest, individual storms could drop a quick half inch with the rich moisture in the atmosphere. Temperatures will continue to be near normal highs and a few degrees above normal lows. && .LONG TERM... (Sunday night through Friday) Issued at 137 AM CDT Sat Jul 11 2026 The upper ridge will move across the northern plains and force a trough over Texas from the northeast for the first part of next week. This will bring better chances for convection Monday and Tuesday. At the same time deep layer moisture will move in from the Gulf pushing PW values above two inches over much of the CWA. This should be sufficient to produce locally heavy rain. WPC has included most of the area in the Level 1 (Marginal) risk of excessive rainfall both Monday and Tuesday. Given the summertime pattern without any clear forcing mechanism, we can't say where there will be better chances for heavy rain at this time. We should get a better idea when the high resolution models take over later in the weekend. By mid-week the upper pattern will start to readjust, but still be somewhat unstable and low rain chances will continue Wednesday and Thursday. && .AVIATION... (18Z TAFS) Issued at 1203 PM CDT Sat Jul 11 2026 Thunderstorms have developed late this morning through the early afternoon and are expected to impact area terminals through at least 22-23Z before quickly dissipating with loss of daytime heating. MVFR ceilings within storms is likely and prevailing TSRA has been utilized at AUS, SAT, and SSF followed by a PROB30 group used after 19/20Z. Winds should remain tame, but some quick gusts within storms is possible up to 20-30 kts. VFR ceilings return by the evening hours, followed by a quick switch to MVFR after 09Z tonight at all sites. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 76 93 76 92 / 10 30 20 60 Austin Bergstrom Intl Airport 76 93 76 92 / 10 30 20 60 New Braunfels Muni Airport 75 93 75 92 / 20 30 10 50 Burnet Muni Airport 74 92 74 91 / 10 30 20 60 Del Rio Intl Airport 75 93 75 93 / 60 40 50 20 Georgetown Muni Airport 75 93 76 92 / 10 30 20 60 Hondo Muni Airport 74 91 75 91 / 40 10 20 20 San Marcos Muni Airport 75 93 75 92 / 20 30 10 60 La Grange - Fayette Regional 76 92 76 91 / 10 40 10 60 San Antonio Intl Airport 76 91 77 91 / 20 20 10 30 Stinson Muni Airport 76 92 76 92 / 20 20 10 30 && .EWX WATCHES/WARNINGS/ADVISORIES... None. && SHORT TERM...05 LONG TERM....05 AVIATION...MMM
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 10:28 AM CDT | Areal Flood Advisory | EWX | Bexar | 4 hr |
| Jul 11, 11:27 AM CDT | Areal Flood Advisory | EWX | Comal, Guadalupe | 4 hr |
| Jul 11, 12:36 PM CDT | Areal Flood Advisory | EWX | Hays, Travis | 4 hr |
| Jul 11, 2:44 PM CDT | Areal Flood Advisory | EWX | Bexar | 4 hr |
| Jul 11, 4:43 PM CDT | Areal Flood Advisory | EWX | Uvalde, Zavala | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2026Every flash flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.