Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 134, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 18, 2021, 3:40 PM CDT for 4 counties in Texas. It was in force for 65 min. 2 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
- May 18, 2021, 3:40 PM CDT (20:40 UTC)
- Expired
- May 18, 2021, 4:45 PM CDT
- In force
- 65 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Caldwell County, TX, Comal County, TX, Hays County, TX, Travis County, TX
The radar
The Austin/San Antonio radar (KEWX), 36 km from the middle of the area, began a volume at 20:44 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 |
|---|---|---|---|
| May 18, 4:09 PM CDT | HAIL 1 | 1 Sse Kyle, TX | QUARTER HAIL REPORTED IN KYLE WITH HEAVY RAINFALL. |
| May 18, 4:20 PM CDT | TSTM WND DMG | 3 Sse Buda, TX | REPORTS OF DAMAGE INCLUDING A FEW TREES DOWN AND A TRAMPOLINE THROWN AS WELL AS SEVERAL VIDEOS OF STRONG WINDS FROM THE BUDA AREA SHARED ON LOCAL MEDIAS SOCIAL MEDIA. TIME ESTIMATED VIA RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 18, 2:29 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 8.7 hours before the alert went out and 252 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
- 12 J/kg
- Mixed-layer CIN
- -595 J/kg
- Mixed-layer LCL
- 1962 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- -43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
951
WUUS54 KEWX 182040
SVREWX
TXC055-091-209-453-182145-
/O.NEW.KEWX.SV.W.0134.210518T2040Z-210518T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
340 PM CDT Tue May 18 2021
The National Weather Service in Austin San Antonio has issued a
* Severe Thunderstorm Warning for...
Northwestern Caldwell County in south central Texas...
Central Hays County in south central Texas...
South central Travis County in south central Texas...
East central Comal County in south central Texas...
* Until 445 PM CDT.
* At 339 PM CDT, severe thunderstorms were located along a line
extending from near Driftwood to near Zorn, moving east at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Austin, San Marcos, Kyle, Buda, Lockhart, Wimberley, Austin
Bergstrom Int Airport, Woodcreek, Martindale, Uhland, Mustang
Ridge, Niederwald, Onion Creek, Shady Hollow, Manchaca, Mountain
City, San Leanna, Hays, Creedmoor and Maha.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2986 9783 2985 9786 2985 9788 2975 9800
2981 9802 2980 9809 3009 9813 3021 9762
TIME...MOT...LOC 2039Z 247DEG 23KT 3008 9802 2976 9798
HAIL...1.00IN
WIND...60MPH
$$
MO4 follow-up statements
251
WWUS54 KEWX 182049
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
349 PM CDT Tue May 18 2021
TXC055-091-209-453-182145-
/O.CON.KEWX.SV.W.0134.000000T0000Z-210518T2145Z/
Caldwell TX-Hays TX-Travis TX-Comal TX-
349 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHWESTERN CALDWELL...CENTRAL HAYS...SOUTH CENTRAL TRAVIS AND
EAST CENTRAL COMAL COUNTIES...
At 349 PM CDT, severe thunderstorms were located along a line
extending from near Wimberley to San Marcos, moving northeast at 20
mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Austin, San Marcos, Kyle, Buda, Lockhart, Wimberley, Austin Bergstrom
Int Airport, Woodcreek, Martindale, Uhland, Mustang Ridge,
Niederwald, Onion Creek, Shady Hollow, Manchaca, Mountain City, San
Leanna, Hays, Creedmoor and Maha.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2986 9783 2985 9786 2985 9788 2975 9800
2981 9802 2980 9809 3009 9813 3021 9762
TIME...MOT...LOC 2049Z 241DEG 18KT 3004 9802 2984 9792
HAIL...1.25IN
WIND...60MPH
$$
MO228
WWUS54 KEWX 182108
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
408 PM CDT Tue May 18 2021
TXC091-182117-
/O.CAN.KEWX.SV.W.0134.000000T0000Z-210518T2145Z/
Comal TX-
408 PM CDT Tue May 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL COMAL COUNTY IS
CANCELLED...
The storms which prompted the warning have moved east and out of the
warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2986 9783 2985 9786 2985 9788 2978 9796
3011 9806 3021 9762
TIME...MOT...LOC 2107Z 249DEG 27KT 3008 9791 2989 9776
$$
TXC055-209-453-182145-
/O.CON.KEWX.SV.W.0134.000000T0000Z-210518T2145Z/
Caldwell TX-Hays TX-Travis TX-
408 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHWESTERN CALDWELL...SOUTHEASTERN HAYS AND SOUTH CENTRAL
TRAVIS COUNTIES...
At 407 PM CDT, severe thunderstorms were located along a line
extending from near Buda to near Lockhart, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Austin, San Marcos, Kyle, Buda, Lockhart, Austin Bergstrom Int
Airport, Martindale, Uhland, Mustang Ridge, Niederwald, Onion Creek,
Shady Hollow, Manchaca, Mountain City, San Leanna, Hays, Creedmoor,
Maha, Maxwell and Reedville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2986 9783 2985 9786 2985 9788 2978 9796
3011 9806 3021 9762
TIME...MOT...LOC 2107Z 249DEG 27KT 3008 9791 2989 9776
HAIL...1.00IN
WIND...60MPH
$$
MO684
WWUS54 KEWX 182120
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
420 PM CDT Tue May 18 2021
TXC055-209-453-182145-
/O.CON.KEWX.SV.W.0134.000000T0000Z-210518T2145Z/
Caldwell TX-Hays TX-Travis TX-
420 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHWESTERN CALDWELL...EAST CENTRAL HAYS AND SOUTH CENTRAL
TRAVIS COUNTIES...
At 419 PM CDT, severe thunderstorms were located along a line
extending from Onion Creek to Lockhart, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Austin, San Marcos, Kyle, Buda, Lockhart, Austin Bergstrom Int
Airport, Martindale, Uhland, Mustang Ridge, Niederwald, Onion Creek,
Shady Hollow, Manchaca, Mountain City, San Leanna, Hays, Creedmoor,
Maha, Maxwell and Reedville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2986 9783 2985 9786 3014 9793 3021 9762
TIME...MOT...LOC 2119Z 252DEG 30KT 3014 9777 2989 9767
HAIL...1.00IN
WIND...60MPH
$$
MO995
WWUS54 KEWX 182133
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
433 PM CDT Tue May 18 2021
TXC209-182143-
/O.CAN.KEWX.SV.W.0134.000000T0000Z-210518T2145Z/
Hays TX-
433 PM CDT Tue May 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HAYS COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2988 9767 2988 9768 3001 9772 3003 9771
3004 9773 3017 9778 3021 9762
TIME...MOT...LOC 2133Z 247DEG 23KT 3017 9768 2992 9758
$$
TXC055-453-182145-
/O.CON.KEWX.SV.W.0134.000000T0000Z-210518T2145Z/
Caldwell TX-Travis TX-
433 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTH CENTRAL CALDWELL AND SOUTH CENTRAL TRAVIS COUNTIES...
At 433 PM CDT, severe thunderstorms were located along a line
extending from Austin Bergstrom Int Airport to 6 miles northeast of
Lockhart, moving northeast at 25 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Austin, Lockhart, Austin Bergstrom Int Airport, Mustang Ridge,
Niederwald, Creedmoor, Maha, Pilot Knob, Lytton Springs, Mendoza,
McKinney Falls State Park, Dale and Del Valle.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 3011 9760 3007 9765 3001 9758 2990 9756
2988 9767 2988 9768 3001 9772 3003 9771
3004 9773 3017 9778 3021 9762
TIME...MOT...LOC 2133Z 247DEG 23KT 3017 9768 2992 9758
HAIL...1.00IN
WIND...60MPH
$$
MOThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 7:14 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 26 min |
| May 17, 7:46 PM CDT | Special Weather Statement | EWX | Dimmit | 44 min |
| May 17, 8:44 PM CDT | Special Weather Statement | EWX | Dimmit | 46 min |
| May 17, 9:36 PM CDT | Areal Flood Advisory | EWX | Dimmit, Zavala | 3 hr |
| May 17, 9:40 PM CDT | Special Weather Statement | EWX | Dimmit | 50 min |
| May 17, 10:10 PM CDT | Special Weather Statement | EWX | Frio | 50 min |
| May 17, 10:39 PM CDT | Areal Flood Advisory | EWX | Dimmit, Frio, Zavala | 2 hr |
| May 17, 10:47 PM CDT | Special Weather Statement | EWX | Dimmit | 28 min |
| May 18, 9:56 AM CDT | Special Weather Statement | EWX | Real | 49 min |
| May 18, 10:29 AM CDT | Special Weather Statement | EWX | Kerr | 46 min |
| May 18, 11:35 AM CDT | Special Weather Statement | EWX | Real | 55 min |
| May 18, 11:58 AM CDT | Areal Flood Advisory | EWX | Edwards, Kerr, Real, Val Verde | 5 hr |
| May 18, 12:54 PM CDT | Special Weather Statement | EWX | Bandera, Gillespie, Kendall | 51 min |
| May 18, 1:29 PM CDT | Special Weather Statement | EWX | Blanco, Kendall | 46 min |
| May 18, 1:51 PM CDT | Severe Thunderstorm Warning | EWX | Bexar, Blanco, Comal, Kendall | 54 min |
| May 18, 2:01 PM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Comal, Kendall, Medina | 3 hr |
| May 18, 2:38 PM CDT | Special Weather Statement | EWX | Comal, Hays | 67 min |
| May 18, 2:46 PM CDT | Areal Flood Advisory | EWX | Bexar, Comal | 3 hr |
| May 18, 2:46 PM CDT | Severe Thunderstorm Warning | EWX | Comal, Hays | 59 min |
| May 18, 3:04 PM CDT | Special Weather Statement | EWX | Wilson | 41 min |
| May 18, 3:35 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Comal, Guadalupe | 55 min |
| May 18, 3:36 PM CDT | Areal Flood Advisory | EWX | Bexar, Caldwell, Comal, Guadalupe, Hays, Wilson | 3 hr |
| May 18, 3:59 PM CDT | Flash Flood Warning | EWX | Comal | 3 hr |
| May 18, 3:59 PM CDT | Special Weather Statement | EWX | Gonzales | 46 min |
| May 18, 4:24 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Gonzales, Guadalupe | 66 min |
| May 18, 4:27 PM CDT | Severe Thunderstorm Warning | EWX | Bastrop, Caldwell, Fayette, Gonzales, Lee, Travis | 63 min |
| May 18, 4:39 PM CDT | Severe Thunderstorm Warning | EWX | Fayette, Gonzales, Lavaca | 66 min |
| May 18, 4:48 PM CDT | Tornado Warning | EWX | Lavaca | 27 min |
| May 18, 5:03 PM CDT | Areal Flood Advisory | EWX | Fayette, Gonzales, Lavaca | 3 hr |
| May 18, 5:15 PM CDT | Special Weather Statement | EWX | Wilson | 45 min |
| May 18, 5:21 PM CDT | Flash Flood Warning | EWX | Caldwell, Gonzales, Guadalupe | 3 hr |
| May 18, 5:28 PM CDT | Areal Flood Advisory | EWX | Frio | 3 hr |
| May 18, 5:29 PM CDT | Special Weather Statement | EWX | Frio | 46 min |
| May 18, 5:31 PM CDT | Special Weather Statement | EWX | Lee | 44 min |
| May 18, 5:35 PM CDT | Special Weather Statement | EWX | Gonzales | 40 min |
| May 18, 5:39 PM CDT | Special Weather Statement | EWX | Fayette | 51 min |
| May 18, 5:42 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Frio | 24 min |
| May 18, 6:06 PM CDT | Areal Flood Advisory | EWX | Bastrop, Lee | 3 hr |
| May 18, 6:14 PM CDT | Tornado Warning | EWX | Fayette | 31 min |
| May 18, 6:26 PM CDT | Tornado Warning | EWX | Fayette | 34 min |
| May 18, 6:39 PM CDT | Tornado Warning | EWX | Lavaca | 51 min |
| May 18, 6:41 PM CDT | Tornado Warning | EWX | Fayette | 34 min |
| May 18, 6:44 PM CDT | Flash Flood Warning | EWX | Fayette, Gonzales, Lavaca | 8 hr |
| May 18, 6:53 PM CDT | Areal Flood Advisory | EWX | DeWitt, Gonzales, Karnes, Lavaca, Wilson | 3 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning in 2021
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.