Flash Flooding and Flooding in Texas, May 1, 2026

Name: Flash Flooding and Flooding in Texas, May 1, 2026
Start: 2026-05-01T00:38
End: 2026-05-01T20:00
Location: Texas

May 1, 2026 · NWS EWX · 10 events in 8 counties and zones

Thunderstorms developed in the vicinity of a stationary front, and some of these storms produced large hail and damaging wind gusts.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 1
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 10

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.

What happened

The episode as NWS EWX wrote it up.

Thunderstorms developed in the vicinity of a stationary front, and some of these storms produced large hail and damaging wind gusts.

What forecasters said that day

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 May 1, 12:37 AM CST, 1 minute earlier. Its key messages:

A Flood Watch remains in effect for locally heavy rain across the area along and north of I-10/Hwy 90 through this evening.
Isolated to scattered thunderstorms are likely into early evening. Some could be strong to severe from San Antonio to the Coastal Plains.
Dry and cooler weather for the weekend with a warming trend for next week.

Area forecast discussion, May 1, 12:37 AM CST, 1 minute before

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
137 AM CDT Fri May 1 2026

...New UPDATE, SHORT TERM, LONG TERM...

.KEY MESSAGES...

- A Flood Watch remains in effect for locally heavy rain across the
area along and north of I-10/Hwy 90 through this evening.

- Isolated to scattered thunderstorms are likely into early evening.
Some could be strong to severe from San Antonio to the Coastal
Plains.

- Dry and cooler weather for the weekend with a warming trend for
  next week.

&&

.UPDATE...
Issued at 131 AM CDT Fri May 1 2026

There a couple of severe thunderstorms moving across the area.
These storms are capable of producing hail up to ping pong ball
size. They are moving toward the east and may last for another
hour. We are not seeing any additional development. We expect to
transition to heavy rain storms over the next few hours.

&&

.SHORT TERM...
(Today through Saturday)
Issued at 131 AM CDT Fri May 1 2026

An upper trough is moving across the Gulf of California and the flow
over TX is becoming southwesterly. The front that moved through our
CWA Wednesday has stalled across South Texas and northeastern
Mexico. Winds across the area are from the northeast which has
brought cooler air. Dewpoints showed an initial drop, but have
rebounded and are in the 60s. The deeper atmosphere is very moist
with PW at DRT this evening 1.80" which is above the 90th percentile
of the observation database. The upper trough will move across TX
today providing a lifting mechanism to interact with our very moist
airmass. Scattered showers and thunderstorms are likely to be ongoing
at the start of this period. Some storms will produce locally heavy
rain. We will continue the Flood Watch for the area along and north
of I-10/Hwy 90. For the daytime hours today, the heaviest rain
should be from the Hill Country to the Coastal Plains. Widespread
rainfall totals of 1-3 inches are possible today through this
evening which will be 2-4 inches when added to rain from Thursday
night. There may be a few spots that get up to 6 inches. In addition
to the flood threat, there may be enough CAPE and shear to generate
a few severe thunderstorms from San Antonio to the Coastal Plains.
All severe modes are possible, the risk is Level 1. North-
northeasterly winds will bring a more stable airmass to the region
tonight. Some showers and thunderstorms will linger across the east
until around midnight, but shouldn't produce much more rain. Cooler
air will move in. Lows Saturday morning will range from the mid 40s
over the Southern Edwards Plateau and Hill Country to the mid 50s
along the Rio Grande. Saturday will be dry and mostly sunny. Highs
will remain on the cool side mostly in the 70s.

&&

.LONG TERM...
(Saturday night through Thursday)
Issued at 131 AM CDT Fri May 1 2026

Saturday night an upper ridge will start to build over TX from the
west. Surface high pressure will move across the area. Sunday
morning will be a couple of degrees cooler than Saturday, but then
we will begin to warm back up. Dry weather will continue into the
middle of the week. Highs will be back to well above normal by
Tuesday. Wednesday a dryline will bring low rain chances to the
east. Thursday another frontal boundary will bring more widespread,
but still low, chances for showers and storms. Cooler air will move
in behind this front bringing temperatures back down to near
normal.

&&

.AVIATION...
(06Z TAFS)
Issued at 1242 AM CDT Fri May 1 2026

Showers and thunderstorms are scattered across the region. Storms
are moving through the San Antonio area at this time and should
reach Austin within a couple of hours. There are also showers and
storms in Mexico moving toward DRT. All sites will have off and on
convection through the night and day. Ceilings and visibilities
will vary between IFR and LIFR with occasional TSRA and RA. We
should see some improvement by late evening, but no VFR in this
TAF period.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              63  52  74  52 / 100  40   0   0
Austin Bergstrom Intl Airport  64  52  73  50 / 100  40   0   0
New Braunfels Muni Airport     65  52  74  50 / 100  30   0   0
Burnet Muni Airport            60  50  72  51 / 100  30   0   0
Del Rio Intl Airport           71  55  73  54 /  90  10   0   0
Georgetown Muni Airport        61  50  72  50 / 100  40   0   0
Hondo Muni Airport             66  50  73  48 /  90  10   0   0
San Marcos Muni Airport        65  52  74  50 / 100  30   0   0
La Grange - Fayette Regional   65  53  73  50 / 100  50   0   0
San Antonio Intl Airport       66  53  74  52 / 100  20   0   0
Stinson Muni Airport           66  53  74  52 / 100  20   0   0

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Flood Watch through this evening for TXZ171>173-183>194-202>209-
221-223.

&&

SHORT TERM...05
LONG TERM....05
AVIATION...05

In the hours before

Special weather statement, Apr 30, 9:39 PM CST, 2 hours 59 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1039 PM CDT Thu Apr 30 2026

TXZ217-228-010430-
Maverick TX-Dimmit TX-
1039 PM CDT Thu Apr 30 2026

...A strong thunderstorm will impact portions of southeastern
Maverick and northwestern Dimmit Counties through 1130 PM CDT...

At 1039 PM CDT, Doppler radar was tracking a strong thunderstorm near
El Indio, moving east at 25 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Carrizo Springs, El Indio, Winter Haven, Carrizo Hill, and Farias
Lake.

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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2833 10030 2840 10035 2842 10034 2845 10034
      2848 10037 2848 10035 2850 10033 2851 10038
      2852 10039 2865 9993 2864 9981 2833 9979
TIME...MOT...LOC 0339Z 264DEG 22KT 2843 10033

MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH

MO

Special weather statement, Apr 30, 10:28 PM CST, 2 hours 10 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1128 PM CDT Thu Apr 30 2026

TXZ228-010515-
Dimmit TX-
1128 PM CDT Thu Apr 30 2026

...A strong thunderstorm will impact portions of central Dimmit
County through 1215 AM CDT...

At 1127 PM CDT, Doppler radar was tracking a strong thunderstorm over
Asherton, or 10 miles southeast of Carrizo Springs, moving east at 15
mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Carrizo Springs, Big Wells, Asherton, Chaparral Wildlife Management
Area, Carrizo Hill, Catarina, Las Vegas, and Brundage.

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.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2833 9995 2852 9996 2860 9940 2832 9939
TIME...MOT...LOC 0427Z 270DEG 15KT 2845 9972

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

MO

Local storm report, Apr 30, 10:35 PM CST, 2 hours 3 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1135 PM CDT Thu Apr 30 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1131 PM     Hail             Asherton                28.45N 99.76W
04/30/2026  M1.00 Inch       Dimmit             TX   Trained Spotter

            Quarter size hail in Asherton.

&&

BF

Special weather statement, Apr 30, 10:50 PM CST, 1 hour 48 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1150 PM CDT Thu Apr 30 2026

TXZ217-010530-
Maverick TX-
1150 PM CDT Thu Apr 30 2026

...A strong thunderstorm will impact portions of northern Maverick
County through 1230 AM CDT...

At 1150 PM CDT, Doppler radar was tracking a strong thunderstorm near
Radar Base, or 8 miles northwest of Eagle Pass, moving east at 45
mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Eagle Pass, Quemado, Paloma, Radar Base, Normandy, Darling, Siesta
Acres, Fabrica, Elm Creek, Las Quintas Fronterizas, and Seco Mines.

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 2871 10051 2874 10051 2876 10053 2880 10053
      2883 10055 2883 10058 2885 10057 2888 10060
      2889 10059 2891 10062 2890 10063 2892 10063
      2894 10065 2905 10014 2870 10012 2867 10050
TIME...MOT...LOC 0450Z 262DEG 41KT 2879 10059

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

MO

Local storm report, Apr 30, 11:11 PM CST, 1 hour 27 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1211 AM CDT Fri May 1 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1136 AM     Hail             Asherton                28.45N 99.76W
04/30/2026  M1.75 Inch       Dimmit             TX   Public

            Picture on social media of golf ball size
            hail.

&&

BF

Special weather statement, Apr 30, 11:52 PM CST, 46 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1252 AM CDT Fri May 1 2026

TXZ191-205>208-010630-
Guadalupe TX-Comal TX-Bexar TX-Caldwell TX-Hays TX-
1252 AM CDT Fri May 1 2026

...A strong thunderstorm will impact portions of western Caldwell,
southeastern Hays, Guadalupe, northeastern Bexar and southeastern
Comal Counties through 130 AM CDT...

At 1252 AM CDT, Doppler radar was tracking a strong thunderstorm near
McQueeney, or near New Braunfels, moving east at 45 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
New Braunfels, San Marcos, Schertz, Kyle, Seguin, Cibolo, Converse,
Universal City, Lockhart, Selma, Luling, Randolph AFB, Bulverde,
Garden Ridge, McQueeney, Martindale, Marion, Uhland, Kingsbury, and
Santa Clara.

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.

&&

LAT...LON 2957 9769 2954 9772 2948 9827 2973 9838
      2999 9773 2976 9762
TIME...MOT...LOC 0552Z 247DEG 39KT 2965 9807

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

MO

The radar

The Austin/San Antonio radar (KEWX), 39 km away, was scanning. The volume nearest the first event began at 06:38 UTC.

Open the radar archive at this moment

Event by event

4 hail, 4 flash flood, 2 flood. Local standard time, as filed.

Hail, Gonzales

When: May 1, 12:38 AM CST
Where: Gonzales County, 0.6 mi E of Belmont
Measured: 1 in hail
Reported by: Emergency Manager
Coordinates: 29.520, -97.690

A thunderstorm produced quarter size hail in Belmont.

Hail, Frio

When: May 1, 12:50 AM CST
Where: Frio County, 0.61 mi W of Derby
Measured: 1 in hail
Reported by: Public
Coordinates: 28.770, -99.130

We received a report on social media that a thunderstorm produced quarter size hail in Derby.

Hail, Lavaca

When: May 1, 1:30 AM CST to 1:40 AM CST
Where: Lavaca County, 2.75 mi NW of Kinkler
Measured: 1.5 in hail
Reported by: CoCoRaHS
Coordinates: 29.560, -96.930

A thunderstorm produced ping pong ball size hail for 10 minutes northwest of the unincorporated community of Kinkler.

Flash Flood, Comal

When: May 1, 6:35 AM CST to 2:00 PM CST
Where: Comal County, 3.66 mi NW of Corbyn to 1.14 mi N of Comal
Cause: Heavy Rain
Reported by: Emergency Manager
Coordinates: 29.670, -98.290

Thunderstorms produced heavy rain that led to flash flooding closing at least eight roads in western Comal County.

Flash Flood, Bexar

When: May 1, 6:54 AM CST to 2:00 PM CST
Where: Bexar County, 0.6 mi W of Alamo Hgts to 1.23 mi E of Brooks Afb
Cause: Heavy Rain
Reported by: Department of Highways
Coordinates: 29.480, -98.490

Thunderstorms produced heavy rain that led to flash flooding. Over 30 roads were flooded from north-central to southeast Bexar County.

Flash Flood, Bexar

When: May 1, 8:15 AM CST to 8:00 PM CST
Where: Bexar County, 1.51 mi SW of San Antonio to 1.56 mi WSW of San Antonio
Cause: Heavy Rain
Deaths: 1 direct, 0 indirect
Reported by: Emergency Manager
Coordinates: 29.407, -98.510

Thunderstorms produced heavy rain that led to flash flooding sending San Pedro Creek out of its banks near Furnish Ave. and S. San Marcos St. San Antonio firefighters were called to the scene to execute a high-water rescue. They recovered a man, but he was pronounced dead at the scene. Police stated a jogger or walker was pulled into the creek by the high water.

Flood, Atascosa

When: May 1, 11:15 AM CST to 2:00 PM CST
Where: Atascosa County, 0.74 mi ENE of North Pleasanton to 1.64 mi WNW of North Pleasanton
Cause: Heavy Rain
Reported by: Public
Coordinates: 28.975, -98.469

Thunderstorms produced heavy rain that led to minor street flooding in Pleasanton.

Hail, Karnes

When: May 1, 11:52 AM CST
Where: Karnes County, 0.92 mi NW of Kenedy
Measured: 1 in hail
Reported by: Emergency Manager
Coordinates: 28.830, -97.860

A thunderstorm produced pea to quarter size hail in Kenedy.

Flood, Karnes

When: May 1, 12:00 PM CST to 1:00 PM CST
Where: Karnes County, 2.16 mi N of Karnes City to 2.81 mi NW of Karnes City
Cause: Heavy Rain
Reported by: Public
Coordinates: 28.911, -97.885

Thunderstorms produced heavy rain that led to flooding. Several roads around Karnes City were flooded including CR 344, Hwy 123, and Hwy 181.

Flash Flood, Guadalupe

When: May 1, 12:30 PM CST to 2:30 PM CST
Where: Guadalupe County, 2.41 mi E of New Berlin to 5.93 mi SE of New Berlin
Cause: Heavy Rain
Reported by: Fire Department/Rescue
Coordinates: 29.470, -98.060

Thunderstorms produced heavy rain that led to flash flooding. There were multiple water rescues and flooded low water crossings across the county.

The people who died

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	2026-05-01	27	Male	Outside/Open Areas	Direct

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Texas in 2026 Every state in 2026 This day in weather history Warnings in Texas, May 2026

Sources

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: 1338424, 1338425, 1338426, 1338427, 1338428, 1338671, 1338435, 1338674, 1340806, 1340807.