Alert archive / Texas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 133, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 18, 2021, 3:35 PM CDT for Caldwell County, Comal County, Guadalupe County, Texas. It was in force for 55 min. 1 report 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, 3:35 PM CDT (20:35 UTC)
- Expired
- May 18, 2021, 4:30 PM CDT
- In force
- 55 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, Guadalupe County, TX
The radar
The Austin/San Antonio radar (KEWX), 23 km from the middle of the area, began a volume at 20:38 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, 3:36 PM CDT | TSTM WND GST 66 | 5 Wnw Geronimo, TX | 66 MPH WIND GUSTS REPORTED BY THE NEW BRAUNFELS ASOS. PEA TO DIME SIZED WIND DRIVEN HAIL. |
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, 8.6 hours before the alert went out and 226 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.
901
WUUS54 KEWX 182035
SVREWX
TXC055-091-187-182130-
/O.NEW.KEWX.SV.W.0133.210518T2035Z-210518T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
335 PM CDT Tue May 18 2021
The National Weather Service in Austin San Antonio has issued a
* Severe Thunderstorm Warning for...
Southwestern Caldwell County in south central Texas...
Northeastern Guadalupe County in south central Texas...
Southeastern Comal County in south central Texas...
* Until 430 PM CDT.
* At 334 PM CDT, a severe thunderstorm was located near New
Braunfels, 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...
New Braunfels, Seguin, Lockhart, Luling, McQueeney, Martindale,
Kingsbury, Staples, Fentress, Geronimo, Zorn, Brownsboro, Hunter,
Joliet, Stairtown, McNeil, Redwood, Freiheit, Gruene and New
Braunfels Regional Airport.
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. This storm may cause serious injury and significant
property damage.
&&
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
LAT...LON 2963 9759 2965 9763 2963 9765 2961 9813
2979 9815 2981 9802 2976 9800 2984 9790
2990 9756 2967 9753
TIME...MOT...LOC 2034Z 262DEG 21KT 2971 9806
HAIL...1.00IN
WIND...60MPH
$$
MO3 follow-up statements
804
WWUS54 KEWX 182048
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
348 PM CDT Tue May 18 2021
TXC055-091-187-182130-
/O.CON.KEWX.SV.W.0133.000000T0000Z-210518T2130Z/
Caldwell TX-Guadalupe TX-Comal TX-
348 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHWESTERN CALDWELL...NORTHEASTERN GUADALUPE AND EASTERN COMAL
COUNTIES...
At 347 PM CDT, a severe thunderstorm was located over Zorn, or 7
miles south of San Marcos, moving east at 30 mph.
HAZARD...60 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
New Braunfels, Seguin, Lockhart, Luling, McQueeney, Martindale,
Kingsbury, Staples, Fentress, Geronimo, Zorn, Brownsboro, Hunter,
Joliet, Stairtown, McNeil, Redwood and New Braunfels Regional
Airport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. This storm may cause serious injury and significant
property damage.
&&
LAT...LON 2963 9759 2965 9763 2963 9765 2961 9805
2980 9808 2981 9802 2976 9800 2984 9790
2990 9756 2967 9753
TIME...MOT...LOC 2047Z 253DEG 26KT 2975 9794
HAIL...1.25IN
WIND...60MPH
$$
MO182
WWUS54 KEWX 182106
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
406 PM CDT Tue May 18 2021
TXC091-182115-
/O.CAN.KEWX.SV.W.0133.000000T0000Z-210518T2130Z/
Comal TX-
406 PM CDT Tue May 18 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN 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 2963 9759 2965 9763 2963 9765 2962 9792
2978 9797 2984 9790 2990 9756 2967 9753
TIME...MOT...LOC 2105Z 270DEG 35KT 2986 9778 2964 9771
$$
TXC055-187-182130-
/O.CON.KEWX.SV.W.0133.000000T0000Z-210518T2130Z/
Caldwell TX-Guadalupe TX-
406 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHWESTERN CALDWELL AND NORTHEASTERN GUADALUPE COUNTIES...
At 405 PM CDT, severe thunderstorms were located along a line
extending from near Martindale to near Luling, moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Seguin, Lockhart, Luling, Martindale, Kingsbury, Staples, Fentress,
Zorn, Geronimo, Brownsboro, Joliet, Stairtown, McNeil and Redwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 900 PM CDT for south central
Texas.
For your protection move to an interior room on the lowest floor of a
building.
Intense thunderstorm lines can produce brief tornadoes and widespread
significant wind damage. Although a tornado is not immediately
likely, it is best to move to an interior room on the lowest floor of
a building. These storms may cause serious injury and significant
property damage.
&&
LAT...LON 2963 9759 2965 9763 2963 9765 2962 9792
2978 9797 2984 9790 2990 9756 2967 9753
TIME...MOT...LOC 2105Z 270DEG 35KT 2986 9778 2964 9771
HAIL...1.00IN
WIND...60MPH
$$
MO592
WWUS54 KEWX 182118
SVSEWX
Severe Weather Statement
National Weather Service Austin/San Antonio TX
418 PM CDT Tue May 18 2021
TXC055-187-182130-
/O.CON.KEWX.SV.W.0133.000000T0000Z-210518T2130Z/
Caldwell TX-Guadalupe TX-
418 PM CDT Tue May 18 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR SOUTHWESTERN CALDWELL AND NORTHEASTERN GUADALUPE COUNTIES...
At 418 PM CDT, severe thunderstorms were located along a line
extending from Lockhart to near Luling, 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...
Lockhart, Luling, Martindale, Kingsbury, Staples, Fentress,
Brownsboro, Joliet, Stairtown and McNeil.
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 2963 9759 2965 9763 2963 9765 2962 9779
2985 9786 2990 9756 2967 9753
TIME...MOT...LOC 2118Z 262DEG 21KT 2987 9770 2965 9763
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, 3:36 PM CDT | Areal Flood Advisory | EWX | Bexar, Caldwell, Comal, Guadalupe, Hays, Wilson | 3 hr |
| May 18, 3:40 PM CDT | Severe Thunderstorm Warning | EWX | Caldwell, Comal, Hays, Travis | 65 min |
| 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.