Alert archive / Texas / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 66, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 1, 2026, 11:54 AM CDT for Atascosa County, Wilson County, Texas. It was in force for 51 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 1, 2026, 11:54 AM CDT (16:54 UTC)
- Expired
- May 1, 2026, 12:45 PM CDT
- In force
- 51 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Atascosa County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 79 km from the middle of the area, began a volume at 16:57 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 nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 4.9 hours before the alert went out and 249 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 1, 6:47 AM CDT, 5 hours 7 minutes 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, 6:47 AM CDT, 5 hours 7 minutes before
Area Forecast Discussion National Weather Service Austin/San Antonio TX 647 AM CDT Fri May 1 2026 ...New AVIATION... .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. && .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... (12Z TAFS) Issued at 640 AM CDT Fri May 1 2026 IFR to MVFR conditions are forecast for the area airports through Saturday morning. Several rounds of showers and storms are forecast to push across the terminals throughout the day as an upper level short wave moves through the region. Any storm that moves over the terminals could have lightning, reduced visibilities, and strong wind gusts. A northerly wind flow is forecast for today into Saturday with breezy and gusty conditions this afternoon through the evening. The storm activity comes to an end in the evening. && .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...18 LONG TERM....18 AVIATION...17
In the hours before
Special weather statement, May 1, 7:38 AM CDT, 4 hours 16 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
738 AM CDT Fri May 1 2026
TXZ202-203-217-218-011330-
Maverick TX-Uvalde TX-Kinney TX-Zavala TX-
738 AM CDT Fri May 1 2026
...A strong thunderstorm will impact portions of southeastern Kinney,
northern Maverick, southwestern Uvalde and northwestern Zavala
Counties through 830 AM CDT...
At 738 AM CDT, Doppler radar was tracking a strong thunderstorm near
Normandy, or near Quemado, moving east at 55 mph.
HAZARD...Penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Quemado, Radar Base, Normandy, Darling, and Paloma.
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 2886 10059 2887 10059 2888 10060 2889 10059
2889 10060 2890 10060 2891 10062 2903 10063
2918 9992 2887 9987 2885 10058
TIME...MOT...LOC 1238Z 264DEG 47KT 2895 10054
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH
27Local storm report, May 1, 7:56 AM CDT, 3 hours 58 minutes before
Preliminary Local Storm Report
National Weather Service Austin/San Antonio TX
756 AM CDT Fri May 1 2026
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0754 AM Flash Flood 1 NNW Olmos Park 29.48N 98.49W
05/01/2026 Bexar TX Dept of Highways
Over 30 flooded roadways across Bexar County
early this morning, scattered from the
north-central to southeast side of the
county.
&&
JRSpecial weather statement, May 1, 8:23 AM CDT, 3 hours 31 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
823 AM CDT Fri May 1 2026
TXZ203-218-219-011415-
Frio TX-Uvalde TX-Zavala TX-
823 AM CDT Fri May 1 2026
...A strong thunderstorm will impact portions of southeastern Uvalde,
northern Zavala and northwestern Frio Counties through 915 AM CDT...
At 823 AM CDT, Doppler radar was tracking a strong thunderstorm near
La Pryor, moving east at 50 mph.
HAZARD...Penny size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
La Pryor, Batesville, Washer, Bluff, and Frio Town.
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 2886 9999 2908 10001 2913 9941 2909 9941
2909 9928 2887 9926
TIME...MOT...LOC 1323Z 264DEG 41KT 2896 9991
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...<30 MPH
27Special weather statement, May 1, 9:06 AM CDT, 2 hours 48 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 906 AM CDT Fri May 1 2026 TXZ204-219-220-011445- Frio TX-Atascosa TX-Medina TX- 906 AM CDT Fri May 1 2026 ...A strong thunderstorm will impact portions of southeastern Medina, northern Frio and northwestern Atascosa Counties through 945 AM CDT... At 906 AM CDT, Doppler radar was tracking a strong thunderstorm near Frio Town, or 12 miles northwest of Pearsall, moving east at 50 mph. HAZARD...Half inch hail. SOURCE...Radar indicated. IMPACT...Minor damage to outdoor objects is possible. Locations impacted include... Pearsall, Devine, Charlotte, North Pearsall, Moore, Goldfinch, Bigfoot, Bluff, Frio Town, Schattel, Iuka, Kyote, and Three Oaks. 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 2886 9935 2906 9936 2917 9869 2885 9867 TIME...MOT...LOC 1406Z 265DEG 45KT 2897 9929 MAX HAIL SIZE...0.50 IN MAX WIND GUST...<30 MPH 27
Special weather statement, May 1, 11:26 AM CDT, 28 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
1126 AM CDT Fri May 1 2026
TXZ219-220-011715-
Frio TX-Atascosa TX-
1126 AM CDT Fri May 1 2026
...A strong thunderstorm will impact portions of northeastern Frio
and northwestern Atascosa Counties through 1215 PM CDT...
At 1126 AM CDT, Doppler radar was tracking a strong thunderstorm near
Moore, or 8 miles north of Pearsall, moving east at 45 mph.
HAZARD...Nickel size hail.
SOURCE...Radar indicated.
IMPACT...Minor damage to outdoor objects is possible.
Locations impacted include...
Pleasanton, Pearsall, Jourdanton, Poteet, North Pearsall, Moore,
Bigfoot, Leming, Schattel, Iuka, Kyote, Espey, Amphion, Rossville,
and Three Oaks.
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 2889 9912 2907 9915 2909 9901 2909 9881
2913 9880 2917 9855 2914 9847 2891 9844
TIME...MOT...LOC 1626Z 263DEG 41KT 2900 9905
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...<30 MPH
27The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 10:39 PM CDT | Special Weather Statement | EWX | Dimmit | 51 min |
| Apr 30, 11:28 PM CDT | Special Weather Statement | EWX | Dimmit | 47 min |
| Apr 30, 11:33 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 57 min |
| Apr 30, 11:50 PM CDT | Special Weather Statement | EWX | Maverick | 40 min |
| May 1, 12:05 AM CDT | Severe Thunderstorm Warning | EWX | Maverick, Zavala | 55 min |
| May 1, 12:42 AM CDT | Severe Thunderstorm Warning | EWX | Frio, Zavala | 63 min |
| May 1, 12:52 AM CDT | Special Weather Statement | EWX | Guadalupe | 38 min |
| May 1, 1:22 AM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Gonzales, Guadalupe | 53 min |
| May 1, 1:28 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Frio, Zavala | 62 min |
| May 1, 1:53 AM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Caldwell, Comal, Gonzales, Guadalupe and 3 more | 8 hr |
| May 1, 2:13 AM CDT | Special Weather Statement | EWX | Lavaca | 47 min |
| May 1, 2:28 AM CDT | Special Weather Statement | EWX | Karnes | 47 min |
| May 1, 2:31 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Karnes | 44 min |
| May 1, 2:37 AM CDT | Severe Thunderstorm Warning | EWX | Lavaca | 23 min |
| May 1, 2:46 AM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Karnes | 32 min |
| May 1, 3:17 AM CDT | Special Weather Statement | EWX | DeWitt | 43 min |
| May 1, 3:22 AM CDT | Special Weather Statement | EWX | Karnes | 38 min |
| May 1, 5:08 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe, Medina | 10 hr |
| May 1, 5:37 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, DeWitt, Frio, Gonzales, Guadalupe and 3 more | 4 hr |
| May 1, 6:34 AM CDT | Areal Flood Advisory | EWX | Caldwell, Fayette, Gonzales, Lavaca | 4 hr |
| May 1, 7:38 AM CDT | Special Weather Statement | EWX | Maverick | 52 min |
| May 1, 8:04 AM CDT | Severe Thunderstorm Warning | EWX | Maverick, Uvalde, Zavala | 20 min |
| May 1, 8:23 AM CDT | Special Weather Statement | EWX | Zavala | 52 min |
| May 1, 9:06 AM CDT | Special Weather Statement | EWX | Frio | 39 min |
| May 1, 11:26 AM CDT | Special Weather Statement | EWX | Atascosa | 49 min |
| May 1, 11:35 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Frio, Medina | 3 hr |
| May 1, 12:29 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, DeWitt, Karnes, Wilson | 46 min |
| May 1, 12:35 PM CDT | Special Weather Statement | EWX | Atascosa, Frio | 40 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2026Every 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.