Alert archive / Texas / Flash Flood Warnings in 2026
Flash Flood Warning 45, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jun 15, 2026, 5:36 AM CDT for Bexar County, Medina County, Texas. It was in force for 5 hr. 7 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
- Jun 15, 2026, 5:36 AM CDT (10:36 UTC)
- Expired
- Jun 15, 2026, 10:32 AM CDT
- In force
- 5 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Bexar County, TX, Medina County, TX
The radar
The Austin/San Antonio radar (KEWX), 46 km from the middle of the area, began a volume at 10:37 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 |
|---|---|---|---|
| Jun 15, 6:25 AM CDT | FLASH FLOOD | 1 Ene Castle Hills, TX | Corrects previous flash flood report from 1 ENE Castle Hills. Several low water crossings closed; currently focused in the north-northwestern half of the county. |
| Jun 15, 6:25 AM CDT | FLASH FLOOD | 1 Ene Castle Hills, TX | Several low water crossings closed; currently focused in the north-northeastern half of the county. |
| Jun 15, 6:33 AM CDT | FLASH FLOOD | 4 Wsw San Antonio, TX | Trained spotter reported water across all 4 lanes of US90 at Cupples Rd. |
| Jun 15, 6:40 AM CDT | FLASH FLOOD | 1 Ne Helotes, TX | Numerous stranded vehicles and water rescues ongoing in NW side of San Antonio. |
| Jun 15, 6:55 AM CDT | FLASH FLOOD | San Antonio, TX | Above 35 low water crossings now closed due to flooding across Bexar County and San Antonio metro area. |
| Jun 15, 7:30 AM CDT | FLASH FLOOD | 1 Nw San Antonio, TX | Delayed report. Water rescue near Lombrano St at Colorado St involving person stranded in vehicle in floodwaters. |
| Jun 15, 8:30 AM CDT | FLASH FLOOD | 6 Sse San Antonio, TX | Two stranded cars in flood waters at SE Military Drive and S New Braunfels Avenue near Brooks. Water depth of 2 to 3 feet. Time estimated. |
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 7 storm reports to this flash flood warning; the first came 49 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 00:00Z, 10.6 hours before the alert went out and 229 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
- 992 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1814 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- -56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
913
WGUS54 KEWX 151036
FFWEWX
TXC029-325-151545-
/O.NEW.KEWX.FF.W.0045.260615T1036Z-260615T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
536 AM CDT Mon Jun 15 2026
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
Bexar County in south central Texas...
East Central Medina County in south central Texas...
* Until 1045 AM CDT.
* At 536 AM CDT, Doppler radar and automated rain gauges 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 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, Schertz, Cibolo, Converse, Universal City, Live Oak,
Selma, Castroville, San Antonio Int Airport, Stinson Municipal
Airport, Randolph AFB, Leon Valley, Helotes, Fair Oaks Ranch,
Kirby, Alamo Heights, Windcrest, Terrell Hills, Bulverde and
Shavano Park.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 2954 9900 2954 9880 2967 9857 2974 9863
2976 9855 2972 9844 2975 9841 2972 9838
2973 9835 2971 9834 2970 9838 2966 9838
2965 9834 2962 9835 2956 9830 2956 9824
2951 9819 2928 9839 2928 9887
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MM1 follow-up statement
430
WGUS74 KEWX 151532
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
1032 AM CDT Mon Jun 15 2026
TXC029-325-151542-
/O.CAN.KEWX.FF.W.0045.000000T0000Z-260615T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-Medina TX-
1032 AM CDT Mon Jun 15 2026
...FLASH FLOOD WARNING FOR BEXAR AND EAST CENTRAL MEDINA COUNTIES
HAS BEEN REPLACED WITH A FLOOD ADVISORY...
&&
LAT...LON 2954 9900 2954 9880 2967 9857 2974 9863
2976 9855 2972 9844 2975 9841 2972 9838
2973 9835 2971 9834 2970 9838 2966 9838
2965 9834 2962 9835 2956 9830 2956 9824
2951 9819 2928 9839 2928 9887
$$
62What 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 Jun 15, 1:35 AM CDT, 4 hours 1 minute earlier. Its key messages:
- Flood Watch remains in effect through Tuesday evening with pockets of heavy rainfall and high hourly rainfall rates expected at times.
- Monitoring any lingering spin associated with the tropical disturbance over Mexico through mid to late week as well as a disturbance over Texas panhandle Friday into Saturday that could continue our rain chances
- Warm and humid conditions persist with elevated heat indices during the second half of next week
Area forecast discussion, Jun 15, 1:35 AM CDT, 4 hours 1 minute before
Area Forecast Discussion National Weather Service Austin/San Antonio TX 135 AM CDT Mon Jun 15 2026 ...New SHORT TERM, LONG TERM... .KEY MESSAGES... - Flood Watch remains in effect through Tuesday evening with pockets of heavy rainfall and high hourly rainfall rates expected at times. - Monitoring any lingering spin associated with the tropical disturbance over Mexico through mid to late week as well as a disturbance over Texas panhandle Friday into Saturday that could continue our rain chances - Warm and humid conditions persist with elevated heat indices during the second half of next week && .SHORT TERM... (Today through Tuesday) Issued at 133 AM CDT Mon Jun 15 2026 As the front continues trekking southward we will see chances for showers and thunderstorms continue to increase overnight out ahead of it. Eventually this front looks to stall somewhere either just north of our region or within it. Still lots of uncertainty on where and when it stalls out. Wherever it does, we could see showers and storms continue to develop along it as abundant tropical moisture from the disturbance now located in Mexico creeps closer. Currently PWATs are in the 2 to 2.4in range across most of our area so the moisture is certainly there. Any thunderstorms that can tap into this moisture will be capable of producing torrential downpours with 2-3 inch rates per hour being possible. With the front stalling and rich tropical moisture present we could see some hefty rainfall totals overnight and through the day Monday as steering for storms will be very weak leading to possibility of flash flooding. Hence we went ahead and issued a Flood Watch earlier that remains in effect now through Tuesday evening as soils remain saturated from the previous few weeks. Additionally, we could see widespread rainfall amounts of 1-3 inches with some areas that see repeated rounds of heavy rainfall receiving up to and above 8 inches. Flash flooding along with responses in area rivers and creeks from runoff will be possible near and downstream of any of those bullseyes of higher totals. Avoid low water crossings and turn around, don't drown! Moisture will continue to be plentiful with recent Hi-Res guidance continuing to show pockets of heavier rainfall totals continuing into Tuesday somewhere across our CWA(every model has a different solution) Eventually rain chances should begin to shift further south and east through the day as the front begins to move. Regarding temperatures Monday with numerous showers and storms likely we should see highs drop a bit with mid to upper 80s more likely and heat indices near the upper 90s to near 100 in any of the areas where some sun breaks out. However with the increased moisture it will still feel quite warm and downright muggy for many. TuesdaY could be a few degrees warmer depending on if we see more peaks of sunshine. Heat indices will once again be in the upper 90s to near 100. && .LONG TERM... (Tuesday night through Sunday) Issued at 133 AM CDT Mon Jun 15 2026 Abundant moisture remains across the area heading into Tuesday evening with most rain and storm chances sliding further southeastward across the Coastal Plains and the TX Coast. Rain chances look to continue at least for the Coastal Plains as leftover spin in the mid-levels of the atmosphere from the disturbance currently meandering across Mexico slowly lifts northeastward. However there still remains considerable uncertainty regarding this tropical disturbance and where its remains eventually end up during midweek. If it tracks closer to our area rain and storm chances would likely increase further westward through the week whereas a track more along or just off the TX Coast would keep chances mainly confined over our Coastal Plains areas. If the more inland scenario plays out then we could be looking at a significant increase for heavier rainfall and the flash flooding threat due to recent saturation over the prior days. However, if the track is more along the Coast then we would need to focus more on hazardous heat with higher heat indices likely across the west and central parts of our area. To complicate matters even further, several models continue indicating an upper level disturbance located within northwesterly flow aloft across the Texas panhandle that could make its way towards Central Texas sometime during the Friday into the Saturday timeframe. This would continue to aggravate soils and increase potential flooding concerns across the region as more showers and thunderstorms could occur as this disturbance tracks over us. Regarding temperatures, by midweek we should warm up again with highs in the 90s however it will still be humid as moisture continues to remain across the area especially with any showers and heavy rainfall that occurs from earlier in the week. Thus the prospects for heat remains albeit trending downward as more disturbances look to impact our area. It will still feel very warm however as abundant moisture sticks around. With highs in the low 90s we could still see heat indices anywhere from 100 to 109 degrees. Remember to continue to practice safe heat safety. && .AVIATION... (06Z TAFS) Issued at 1206 AM CDT Mon Jun 15 2026 A very active night ahead at area terminals. Opted to continue with the status quo, but to add prevailing TSRA at AUS through 09Z and introduce TEMPO groups instead of PROB30 groups at SAT and SSF through sunrise. Low confidence in afternoon storm coverage at this time as well as the evolution of storms for Monday night. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 83 74 87 74 / 90 40 60 10 Austin Bergstrom Intl Airport 83 74 86 74 / 90 50 60 10 New Braunfels Muni Airport 83 73 85 73 / 90 70 60 10 Burnet Muni Airport 80 71 86 72 / 90 30 30 0 Del Rio Intl Airport 87 73 91 74 / 80 30 20 0 Georgetown Muni Airport 82 72 86 73 / 90 30 50 10 Hondo Muni Airport 83 72 86 72 / 90 60 60 0 San Marcos Muni Airport 83 73 85 73 / 90 60 60 10 La Grange - Fayette Regional 83 74 84 74 / 80 70 80 10 San Antonio Intl Airport 84 74 85 74 / 90 70 70 10 Stinson Muni Airport 84 74 85 74 / 90 70 70 10 && .EWX WATCHES/WARNINGS/ADVISORIES... Flood Watch through Tuesday evening for TXZ171>173-183>194- 202>209-217>225-228. && SHORT TERM...CJM LONG TERM....CJM AVIATION...MMM
In the hours before
Local storm report, Jun 15, 3:55 AM CDT, 1 hour 41 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
355 AM CDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 AM Flash Flood Marble Falls 30.58N 98.28W
06/15/2026 Burnet TX Emergency Mngr
Several low water crossings closed in
southern Burnet county near Marble Falls.
&&
MBLocal storm report, Jun 15, 3:56 AM CDT, 1 hour 40 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
356 AM CDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 AM Flash Flood Horseshoe Bay 30.54N 98.37W
06/15/2026 Llano TX Emergency Mngr
Several low water crossings closed in
southeastern Llano County near Horseshoe
Bay.
&&
MBLocal storm report, Jun 15, 4:00 AM CDT, 1 hour 36 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
400 AM CDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0358 AM Flash Flood Johnson City 30.28N 98.41W
06/15/2026 Blanco TX Law Enforcement
Flooding of the low water crossings with 3
feet of flowing water in Johnson City.
&&
MBLocal storm report, Jun 15, 4:05 AM CDT, 1 hour 31 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
405 AM CDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 AM Flash Flood 2 N Austin 30.31N 97.74W
06/15/2026 Travis TX County Official
Several low water crossings closed across
Travis County; especially North Austin.
&&
MBLocal storm report, Jun 15, 4:10 AM CDT, 1 hour 26 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
410 AM CDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0409 AM Flash Flood 1 WNW Austin 30.28N 97.75W
06/15/2026 Travis TX Emergency Mngr
Just under 2 dozen low water crossings
closed within City of Austin. Shoal Creek at
12 street had risen to a crest near 9 feet.
&&
MBLocal storm report, Jun 15, 4:47 AM CDT, 49 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
447 AM CDT Mon Jun 15 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0445 AM Flash Flood 1 NNW Onion Creek 30.15N 97.80W
06/15/2026 Travis TX Broadcast Media
Ongoing water rescue at the low water
crossing on Slaughter Creek at Old San
Antonio Road in Travis County.
&&
MBThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 14, 8:27 PM CDT | Areal Flood Advisory | EWX | Val Verde | 3 hr |
| Jun 14, 9:22 PM CDT | Areal Flood Advisory | EWX | Burnet, Llano | 3 hr |
| Jun 14, 9:40 PM CDT | Flash Flood Warning | EWX | Llano | 3 hr |
| Jun 14, 9:50 PM CDT | Areal Flood Advisory | EWX | Edwards, Val Verde | 115 min |
| Jun 14, 9:57 PM CDT | Flash Flood Warning | EWX | Burnet | 3 hr |
| Jun 14, 10:49 PM CDT | Flash Flood Warning | EWX | Edwards, Val Verde | 4 hr |
| Jun 14, 11:19 PM CDT | Areal Flood Advisory | EWX | Gillespie | 9 min |
| Jun 14, 11:28 PM CDT | Flash Flood Warning | EWX | Gillespie | 5 hr |
| Jun 14, 11:35 PM CDT | Areal Flood Advisory | EWX | Gillespie, Llano | 3 hr |
| Jun 14, 11:42 PM CDT | Flash Flood Warning | EWX | Blanco, Burnet, Llano | 6 hr |
| Jun 14, 11:50 PM CDT | Areal Flood Advisory | EWX | Edwards, Kerr, Kinney, Real, Val Verde | 3 hr |
| Jun 15, 12:23 AM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 3 hr |
| Jun 15, 12:55 AM CDT | Flash Flood Warning | EWX | Burnet, Travis, Williamson | 8 hr |
| Jun 15, 1:30 AM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Kendall, Medina | 20 min |
| Jun 15, 1:50 AM CDT | Flash Flood Warning | EWX | Bandera, Bexar, Kendall, Medina | 8 hr |
| Jun 15, 1:53 AM CDT | Areal Flood Advisory | EWX | Blanco, Hays, Travis | 27 min |
| Jun 15, 2:01 AM CDT | Areal Flood Advisory | EWX | Medina, Uvalde | 3 hr |
| Jun 15, 2:08 AM CDT | Flash Flood Warning | EWX | Bastrop, Lee, Travis, Williamson | 6 hr |
| Jun 15, 2:20 AM CDT | Flash Flood Warning | EWX | Blanco, Hays, Travis | 7 hr |
| Jun 15, 2:41 AM CDT | Areal Flood Advisory | EWX | Bandera, Kendall, Kerr | 3 hr |
| Jun 15, 3:08 AM CDT | Flash Flood Warning | EWX | Bandera, Medina, Real, Uvalde | 4 hr |
| Jun 15, 3:15 AM CDT | Flash Flood Warning | EWX | Blanco, Comal, Hays | 6 hr |
| Jun 15, 3:31 AM CDT | Flash Flood Warning | EWX | Bandera, Kerr | 5 hr |
| Jun 15, 4:04 AM CDT | Areal Flood Advisory | EWX | Gillespie, Kendall | 3 hr |
| Jun 15, 4:23 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe, Hays | 4 hr |
| Jun 15, 4:24 AM CDT | River Flood Warning | EWX | Travis | 5 hr |
| Jun 15, 4:41 AM CDT | Areal Flood Advisory | EWX | Bastrop, Caldwell, Lee | 4 hr |
| Jun 15, 4:48 AM CDT | Flash Flood Warning | EWX | Kendall | 4 hr |
| Jun 15, 4:58 AM CDT | Flash Flood Warning | EWX | Maverick | 6 hr |
| Jun 15, 6:35 AM CDT | Areal Flood Advisory | EWX | Fayette, Gonzales, Guadalupe, Lavaca, Lee | 3 hr |
| Jun 15, 6:53 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Guadalupe, Karnes, Wilson | 3 hr |
| Jun 15, 6:59 AM CDT | Areal Flood Advisory | EWX | Medina, Uvalde | 3 hr |
| Jun 15, 7:38 AM CDT | Areal Flood Advisory | EWX | Maverick | 58 min |
| Jun 15, 8:06 AM CDT | Areal Flood Advisory | EWX | Bastrop, Lee, Travis, Williamson | 114 min |
| Jun 15, 8:25 AM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Guadalupe | 95 min |
| Jun 15, 8:28 AM CDT | River Flood Warning | EWX | Bexar | 19 hr |
| Jun 15, 8:30 AM CDT | Areal Flood Advisory | EWX | Burnet, Travis, Williamson | 60 min |
| Jun 15, 8:36 AM CDT | Flash Flood Warning | EWX | Maverick | 7 hr |
| Jun 15, 8:52 AM CDT | Areal Flood Advisory | EWX | Kendall | 3 hr |
| Jun 15, 8:57 AM CDT | Areal Flood Advisory | EWX | Bandera, Kerr | 78 min |
| Jun 15, 8:59 AM CDT | Areal Flood Advisory | EWX | Blanco, Comal, Hays | 91 min |
| Jun 15, 9:02 AM CDT | Areal Flood Advisory | EWX | Blanco, Hays, Travis | 88 min |
| Jun 15, 9:23 AM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Kendall, Medina | 2 hr |
| Jun 15, 9:50 AM CDT | River Flood Warning | EWX | Bexar | 24 hr |
| Jun 15, 9:53 AM CDT | River Flood Warning | EWX | Bexar, Wilson | 23 hr |
| Jun 15, 10:32 AM CDT | Areal Flood Advisory | EWX | Bexar, Medina | 73 min |
| Jun 15, 10:59 AM CDT | Areal Flood Advisory | EWX | Maverick | 3 hr |
| Jun 15, 3:01 PM CDT | River Flood Warning | EWX | Karnes, Wilson | 18 hr |
| Jun 15, 3:37 PM CDT | Areal Flood Advisory | EWX | Edwards, Kinney, Val Verde | 2 hr |
| Jun 15, 3:53 PM CDT | Areal Flood Advisory | EWX | Maverick | 83 min |
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.