Alert archive / Texas / Flash Flood Warnings in 2026
Flash Flood Warning 49, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jun 20, 2026, 2:04 AM CDT for Bexar County, Medina County, Texas. It was in force for 4 hr. 8 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 20, 2026, 2:04 AM CDT (07:04 UTC)
- Expired
- Jun 20, 2026, 6:00 AM CDT
- In force
- 4 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), 75 km from the middle of the area, began a volume at 07:07 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 20, 2:06 AM CDT | FLASH FLOOD | 2 Nw Olmos Park, TX | Report from mPING Street/road flooding Street/road closed Vehicles stranded. |
| Jun 20, 2:15 AM CDT | FLASH FLOOD | 3 Ne Leon Valley, TX | Report from mPING Street/road flooding; Street/road closed; Vehicles stranded. |
| Jun 20, 2:23 AM CDT | FLASH FLOOD | 2 N Castle Hills, TX | Report from mPING Street/road flooding Street/road closed Vehicles stranded. |
| Jun 20, 2:25 AM CDT | FLASH FLOOD | San Antonio, TX | Several low water crossings closed across San Antonio and Bexar County. |
| Jun 20, 4:30 AM CDT | FLASH FLOOD | 1 S Rio Medina, TX | Multiple water rescues occurred at FM 471 N at San Geronimo Creek. Time estimated. |
| Jun 20, 4:30 AM CDT | FLASH FLOOD | 4 Wsw Government Canyon, TX | Corrects previous flash flood report from 1 S Rio Medina. Multiple water rescues occurred at FM 471 N at San Geronimo Creek. Time estimated. |
| Jun 20, 5:30 AM CDT | FLASH FLOOD | 3 N Lackland Afb, TX | Pictures of low crossing of Leon Creek with few feet of flowing water at State Highway 151 and Pinn Road. Time estimated. |
| Jun 20, 5:30 AM CDT | FLASH FLOOD | 4 N Lackland Afb, TX | Stalled car in low water crossing of Leon Creek at West Commerce Street. Time estimated. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 7.1 hours before the alert went out and 204 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
- 671 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 1491 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted.
077
WGUS54 KEWX 200704
FFWEWX
TXC029-325-201100-
/O.NEW.KEWX.FF.W.0049.260620T0704Z-260620T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
204 AM CDT Sat Jun 20 2026
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
West Central Bexar County in south central Texas...
East Central Medina County in south central Texas...
* Until 600 AM CDT.
* At 204 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts up to 2 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, Castroville, Stinson Municipal Airport, San Antonio
Int Airport, Leon Valley, Helotes, Alamo Heights, Terrell Hills,
Shavano Park, Hollywood Park, Olmos Park, Lacoste, Sea World,
Lackland AFB, Government Canyon State Natural Area, Cliff, Rio
Medina, Bader, Castle Hills and Balcones Heights.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2938 9897 2956 9881 2953 9881 2960 9846
2935 9841 2928 9860 2931 9883
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MO1 follow-up statement
956
WGUS74 KEWX 200840
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
340 AM CDT Sat Jun 20 2026
TXC029-325-201100-
/O.CON.KEWX.FF.W.0049.000000T0000Z-260620T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-Medina TX-
340 AM CDT Sat Jun 20 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 6 AM CDT EARLY THIS
MORNING FOR WEST CENTRAL BEXAR AND EAST CENTRAL MEDINA COUNTIES...
At 340 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 5 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
San Antonio, Castroville, Stinson Municipal Airport, San Antonio
Int Airport, Leon Valley, Helotes, Alamo Heights, Terrell Hills,
Shavano Park, Hollywood Park, Olmos Park, Lacoste, Sea World,
Lackland AFB, Government Canyon State Natural Area, Cliff, Rio
Medina, Bader, Castle Hills and Balcones Heights.
Light to moderate rains continue to fall over the warned area, with
an additional 1/4 to 1/2 inch possible through 6 AM. This additional
rain could maintain elevated flows on area creeks and streams and
also further add to the flooding of poor drainage areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2938 9897 2956 9881 2953 9881 2960 9846
2935 9841 2928 9860 2931 9883
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MOThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 9:34 PM CDT | Special Weather Statement | EWX | La Salle | 41 min |
| Jun 19, 10:14 PM CDT | Special Weather Statement | EWX | Dimmit | 46 min |
| Jun 19, 10:20 PM CDT | Areal Flood Advisory | EWX | Dimmit | 3 hr |
| Jun 19, 10:56 PM CDT | Special Weather Statement | EWX | Uvalde, Zavala | 64 min |
| Jun 19, 11:03 PM CDT | Areal Flood Advisory | EWX | Dimmit, Uvalde, Zavala | 3 hr |
| Jun 19, 11:46 PM CDT | Areal Flood Advisory | EWX | Bandera, Frio, Medina, Uvalde | 4 hr |
| Jun 20, 12:20 AM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Kendall | 3 hr |
| Jun 20, 12:40 AM CDT | Areal Flood Advisory | EWX | Frio | 3 hr |
| Jun 20, 12:41 AM CDT | Flash Flood Warning | EWX | Bandera, Medina | 4 hr |
| Jun 20, 1:34 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Kendall | 4 hr |
| Jun 20, 1:38 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Medina | 3 hr |
| Jun 20, 1:41 AM CDT | Special Weather Statement | EWX | Kendall | 49 min |
| Jun 20, 2:42 AM CDT | Special Weather Statement | EWX | Burnet | 48 min |
| Jun 20, 2:49 AM CDT | Areal Flood Advisory | EWX | DeWitt, Gonzales, Karnes, Wilson | 4 hr |
| Jun 20, 2:57 AM CDT | Areal Flood Advisory | EWX | Bandera, Medina, Real, Uvalde | 4 hr |
| Jun 20, 3:00 AM CDT | Areal Flood Advisory | EWX | Burnet, Travis, Williamson | 4 hr |
| Jun 20, 4:48 AM CDT | Areal Flood Advisory | EWX | Burnet | 3 hr |
| Jun 20, 11:52 AM CDT | River Flood Warning | EWX | Bexar | 21 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.