Alert archive / Texas / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 155, NWS Austin/San Antonio, TX

May 27, 2026DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 27, 2026, 12:00 AM CDT for DeWitt County, Lavaca County, Texas. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 27, 2026, 12:00 AM CDT (05:00 UTC)
Expired: May 27, 2026, 12:45 AM CDT
In force: 45 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties DeWitt County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 100 km from the middle of the area, began a volume at 05:00 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 26, 8:13 PM CDT	Severe Thunderstorm Watch	SPC	12 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.0 hours before the alert went out and 168 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1734 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 877 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 11.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 26, 8:42 PM CDT, 3 hours 18 minutes earlier. Its key messages:

Active and unsettled weather pattern this afternoon through Wednesday with localized flooding issues possible.
Warmer and drier weather forecast for latter part of the work week
Rain chances return over the weekend and early next week as we turn the calendar to June.

Area forecast discussion, May 26, 8:42 PM CDT, 3 hours 18 minutes before

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
842 PM CDT Tue May 26 2026

...New UPDATE...

.KEY MESSAGES...

- Active and unsettled weather pattern this afternoon through
  Wednesday with localized flooding issues possible.

- Warmer and drier weather forecast for latter part of the work
  week

- Rain chances return over the weekend and early next week as we
  turn the calendar to June.

&&

.UPDATE...
Issued at 837 PM CDT Tue May 26 2026

We adjusted/expanded/extended the Severe Thunderstorm Watch. We
cancelled the northern and western portions. We expanded it to the
east from Bexar to Lavaca and extended it until 6 AM. This will
likely be canceled before then, but the watch extends to the
coast into the Corpus Christi CWA. A line of thunderstorms is
moving toward the east through Medina and Frio Counties and will
continue for the next few hours.

&&

.SHORT TERM...
(Tonight through Wednesday night)
Issued at 1256 PM CDT Tue May 26 2026

As of 1 PM CDT, the line of storms that extends from the San
Angelo's area to the southwest into the Midland's area is
producing heavy rain with rain rates of 1 to 2 inches per hour.
This trend is forecast to continue as the line pushes eastward
this afternoon and evening. This activity is taking advantage of a
mid to upper level trough axis moving across the Southern
Plains/central Texas. As the day progresses, instability increases
to help storms grow to strong and severe weather levels. All
severe weather hazards are possible including very large hail of
2+ inches. Can't rule out an isolated tornado or two. A Level 2 of
5 (Storm Prediction Center) risk of severe thunderstorms
highlights areas west of Highway 281 and Level 1 of 5 risk for
severe thunderstorms east of Highway 281 through Wednesday
morning. Also, WPC ERO Day 1 highlights all of South Central
Texas at a Level 1 of 4 risk of excessive rainfall through
Wednesday morning. As a matter of fact, we are expecting rainfall
rates to be elevated as the convective line of storms moves across
most of the local area through the period. Due to saturated soils
or very wet grounds per last several days, a quick 1 to 3 inches
could cause some sort of flooding issues across the area,
especially over the Flood Watch area. The big concern with this
line is that if slows down as it pushes through Rio Grande
Plains, Southern Edwards Plateau, and Hill Country, then
probabilities go up for isolated spots to get up to 5 inches of
rainfall. Can't pinpoint the locations and therefore, anyone
under the Flood Watch has equal opportunities. The Flood Watch is
in effect from 4 PM through 8 AM Wednesday and takes all
uncertainties into account. The most likely storm timing is mid/late
afternoon and evening along the Rio Grande Plains, late evening
through early overnight over the Hill Country and parts of the
I-35 corridor, and overnight east of I-35 corridor and Coastal
Plains.

By noon Wednesday, most of the shower and thunderstorm activity
should be concentrated east of I-35 corridor with rain chances
diminishing and coming to an end during the evening.

&&

.LONG TERM...
(Thursday through next Tuesday)
Issued at 1256 PM CDT Tue May 26 2026

Dry weather conditions are in store for Thursday and Friday for the
most part. Can't rule out a few showers or even an isolated
thunderstorms along and east of Highway 77 both afternoons. After a
cooler day on Wednesday due to cloud cover and wet grounds, a
warming trend starts for the latter portion of the week with highs
in the upper 80s and lower 90s over most places with mid 90s along
the Rio Grande Plains.

Rain chances return over parts of South Central Texas especially
areas along the Rio Grande Plains and Hill Country per latest
guidance. The somewhat weather pattern continues into early next
week with highs in the 80s and 90s.

&&

.AVIATION...
(00Z TAFS)
Issued at 622 PM CDT Tue May 26 2026

Showers and thunderstorms will be the main concern for the next
6-12 hours. Storms have moved east of DRT and they should be free
of convection for the rest of the night. The best timing in the
Austin and San Antonio areas looks between 03Z and 07Z. Any storms
will lower visibility. After 07Z there will be a continued low
chance for showers until around sunrise. Any showers overnight
will lower ceiling. All airports will be VFR Wednesday.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              70  84  70  88 /  80  50  30  20
Austin Bergstrom Intl Airport  71  84  71  88 /  90  60  30  20
New Braunfels Muni Airport     70  84  69  88 /  90  50  10  20
Burnet Muni Airport            68  81  68  85 /  80  50  20  10
Del Rio Intl Airport           69  89  71  91 /  70  10  10   0
Georgetown Muni Airport        69  82  69  86 /  80  50  30  20
Hondo Muni Airport             69  83  69  87 /  80  50  10  10
San Marcos Muni Airport        70  84  70  88 /  90  50  20  20
La Grange - Fayette Regional   72  82  70  87 /  80  60  20  40
San Antonio Intl Airport       71  84  71  88 /  90  40  20  10
Stinson Muni Airport           71  84  71  88 /  90  40  10  10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Flood Watch until 8 AM CDT Wednesday for TXZ171>173-183>192-
202>206.

&&

SHORT TERM...17
LONG TERM....17
AVIATION...05

In the hours before

Local storm report, May 26, 10:30 PM CDT, 1 hour 30 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1030 PM CDT Tue May 26 2026

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

0926 PM     Flash Flood      3 ENE Burnet            30.79N 98.18W
05/26/2026                   Burnet             TX   Emergency Mngr

            EM reports 1 water rescue located off CR200.
            With another vehicle stuck in mud near
            Hamilton creek and the Colorado River.
            Multiple reports of overtopped Low Water
            Crossings across the county.

&&

CJM

Local storm report, May 26, 10:39 PM CDT, 1 hour 21 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1039 PM CDT Tue May 26 2026

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

1025 PM     Tstm Wnd Gst     1 NE New Berlin         29.48N 98.09W
05/26/2026  M62 MPH          Guadalupe          TX   Mesonet

            Mesonet station TWB16 1.1 NE New Berlin
            (TWDB).

&&

Local storm report, May 26, 10:42 PM CDT, 1 hour 18 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1042 PM CDT Tue May 26 2026

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

1030 PM     Tstm Wnd Gst     New Berlin              29.46N 98.10W
05/26/2026  M57 MPH          Guadalupe          TX   Public

            personal weather station.

&&

Local storm report, May 26, 11:10 PM CDT, 50 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1110 PM CDT Tue May 26 2026

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

1106 PM     Tstm Wnd Dmg     Smiley                  29.28N 97.64W
05/26/2026                   Gonzales           TX   Law Enforcement

            Smiley Fire Department responding to
            possible down power lines.

&&

CJM

Special weather statement, May 26, 11:34 PM CDT, 26 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
1134 PM CDT Tue May 26 2026

TXZ222>225-270515-
Karnes TX-Lavaca TX-De Witt TX-Gonzales TX-
1134 PM CDT Tue May 26 2026

...Strong thunderstorms will impact portions of DeWitt, southeastern
Karnes, south central Gonzales and southern Lavaca Counties through
1215 AM CDT...

At 1134 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Hochheim to near Charco. Movement was east
at 55 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Cuero, Yoakum, Yorktown, Nordheim, Thomaston, Ezzell, Speaks,
Westhoff, Cotton Patch, Edgar, Gruenau, Terryville, New Davy, Sample,
Meyersville, Arneckville, Concrete, and Hope.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for
south central Texas.

&&

LAT...LON 2906 9694 2910 9698 2887 9730 2892 9742
      2871 9772 2871 9776 2924 9756 2934 9656
TIME...MOT...LOC 0434Z 262DEG 46KT 2929 9727 2872 9764

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

62

Local storm report, May 26, 11:47 PM CDT, 13 minutes before

Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
1147 PM CDT Tue May 26 2026

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

1130 PM     Flash Flood      San Antonio             29.42N 98.50W
05/26/2026                   Bexar              TX   County Official

            Reports of numerous low water crossings
            closed across Bexar County.

&&

CJM

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 26, 7:00 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde, Zavala	60 min
May 26, 7:04 PM CDT	Special Weather Statement	EWX	Burnet	41 min
May 26, 7:21 PM CDT	Special Weather Statement	EWX	Bandera, Blanco, Gillespie, Kendall	54 min
May 26, 7:35 PM CDT	Areal Flood Advisory	EWX	Uvalde, Zavala	3 hr
May 26, 7:35 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	40 min
May 26, 7:37 PM CDT	Severe Thunderstorm Warning Considerable damage threat	EWX	Atascosa	30 min
May 26, 7:42 PM CDT	Tornado Warning	EWX	Atascosa	12 min
May 26, 7:46 PM CDT	Severe Thunderstorm Warning Considerable damage threat	EWX	Dimmit, Frio, Medina, Uvalde, Zavala	59 min
May 26, 7:49 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Burnet, Llano	3 hr
May 26, 7:55 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Atascosa	3 hr
May 26, 8:03 PM CDT	Severe Thunderstorm Warning	EWX	Kendall, Kerr	16 min
May 26, 8:08 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	17 min
May 26, 8:09 PM CDT	Areal Flood Advisory	EWX	Bandera, Gillespie, Kendall, Kerr, Llano	3 hr
May 26, 8:15 PM CDT	Special Weather Statement	EWX	Bandera, Bexar, Blanco, Comal, Hays, Kendall and 2 more	90 min
May 26, 8:25 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Kendall, Kerr	3 hr
May 26, 8:26 PM CDT	Special Weather Statement	EWX	Williamson	79 min
May 26, 8:37 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Frio, Medina	68 min
May 26, 8:47 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Comal, Kendall, Kerr	58 min
May 26, 8:53 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Burnet, Williamson	5 hr
May 26, 8:58 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Blanco, Burnet	3 hr
May 26, 9:22 PM CDT	Areal Flood Advisory	EWX	Bandera, Kendall	3 hr
May 26, 9:29 PM CDT	Special Weather Statement	EWX	Atascosa, Bexar, Karnes, Wilson	91 min
May 26, 9:31 PM CDT	Special Weather Statement	EWX	Bastrop, Blanco, Caldwell, Comal, Guadalupe, Hays and 4 more	89 min
May 26, 9:39 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Comal, Frio, Kendall, Medina	3 hr
May 26, 9:48 PM CDT	Tornado Warning	EWX	Bexar, Comal, Guadalupe	42 min
May 26, 10:02 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Bexar	3 hr
May 26, 10:21 PM CDT	Tornado Warning	EWX	Gonzales, Guadalupe	28 min
May 26, 10:49 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Comal, Guadalupe	3 hr
May 26, 10:49 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, DeWitt, Fayette, Gonzales, Guadalupe, Lavaca	56 min
May 26, 11:16 PM CDT	Tornado Warning	EWX	Fayette, Gonzales, Lavaca	13 min
May 26, 11:28 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Fayette, Lee	77 min
May 26, 11:34 PM CDT	Special Weather Statement	EWX	DeWitt	41 min
May 26, 11:37 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Fayette, Gonzales, Lavaca	68 min
May 27, 3:10 AM CDT	River Flood Warning	EWX	Williamson	6 hr
May 27, 3:18 AM CDT	Special Weather Statement	EWX	Maverick	42 min
May 27, 7:02 AM CDT	Areal Flood Advisory	EWX	Karnes	118 min

Nearby

Severe Thunderstorm Warnings in Texas, 2026 Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.