Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 67, NWS Austin/San Antonio, TX

April 28, 20217 counties in Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 28, 2021, 7:59 PM CDT for 7 counties in Texas. It was in force for 61 min. 12 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: Apr 28, 2021, 7:59 PM CDT (00:59 UTC)
Expired: Apr 28, 2021, 9:00 PM CDT
In force: 61 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 2.0 in
Wind: 70.0 mph

Counties Atascosa County, TX, Bandera County, TX, Bexar County, TX, Comal County, TX, Kendall County, TX, Medina County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 62 km from the middle of the area, began a volume at 00:59 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
Apr 28, 8:00 PM CDT	HAIL 2.5	7 W Castroville, TX
Apr 28, 8:10 PM CDT	TSTM WND GST 61	2 Ese Castroville, TX
Apr 28, 8:10 PM CDT	HAIL 1.75	3 Wnw Castroville, TX
Apr 28, 8:16 PM CDT	TSTM WND DMG	Castroville, TX	REPORTS OF AN RV FLIPPED...SEVERAL TREES UPROOTED...FENCES BLOWN DOWN...AND IRRIGATION PIPES TWISTED. TIME ESTIMATED VIA RADAR.
Apr 28, 8:17 PM CDT	HAIL 1	Sea World, TX
Apr 28, 8:22 PM CDT	HAIL 1.5	3 Nnw Lackland Afb, TX	TWITTER REPORT.
Apr 28, 8:23 PM CDT	HAIL 1	2 Wnw Lackland Afb, TX	TWITTER REPORT.
Apr 28, 8:27 PM CDT	HAIL 1	4 Sw Sea World, TX
Apr 28, 8:35 PM CDT	HAIL 1	2 Wsw Lackland Afb, TX
Apr 28, 8:40 PM CDT	HAIL 1.75	3 Nw Sea World, TX	TWITTER REPORT.
Apr 28, 8:55 PM CDT	HAIL 1	4 S Helotes, TX
Apr 28, 9:07 PM CDT	HAIL 0.5	1 Nnw Leon Valley, TX

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
Apr 28, 3:10 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 1.0 hours before the alert went out and 220 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: 133 J/kg
Mixed-layer CIN: -279 J/kg
Mixed-layer LCL: 1737 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: -173 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -1.2

Open this sounding in Storm Lab

The text

As transmitted.

543 
WUUS54 KEWX 290059
SVREWX
TXC013-019-029-091-259-325-493-290200-
/O.NEW.KEWX.SV.W.0067.210429T0059Z-210429T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
759 PM CDT Wed Apr 28 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Eastern Medina County in south central Texas...
  Southeastern Bandera County in south central Texas...
  Northwestern Atascosa County in south central Texas...
  Southeastern Kendall County in south central Texas...
  Southwestern Wilson County in south central Texas...
  Bexar County in south central Texas...
  Central Comal County in south central Texas...

* Until 900 PM CDT.

* At 759 PM CDT, a severe thunderstorm was located over Rio Medina,
  or near Castroville, moving east at 45 mph.

  HAZARD...Two inch hail and 70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           considerable tree damage. Wind damage is also likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  San Antonio, Schertz, Universal City, Live Oak, Boerne, Selma,
  Hondo, Devine, Castroville, Stinson Municipal Airport, San Antonio
  Int Airport, Randolph AFB, Canyon Lake, Leon Valley, Helotes, Fair
  Oaks Ranch, Kirby, Alamo Heights, Windcrest and Terrell Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

This storm is producing destructive winds and large damaging hail.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows!

Large hail, damaging winds, and continuous cloud to ground lightning
are occurring with this storm. Move indoors immediately. Lightning is
one of nature's leading killers. Remember, if you can hear thunder,
you are close enough to be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

LAT...LON 2909 9881 2909 9901 2912 9916 2963 9915
      2998 9827 2962 9826 2959 9831 2956 9830
      2954 9825 2955 9825 2900 9823
TIME...MOT...LOC 0059Z 269DEG 40KT 2941 9890 

HAIL...2.00IN
WIND...70MPH
 
$$

BRADY

3 follow-up statements

925 
WWUS54 KEWX 290117
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
817 PM CDT Wed Apr 28 2021

TXC013-019-029-091-259-325-493-290200-
/O.CON.KEWX.SV.W.0067.000000T0000Z-210429T0200Z/
Medina TX-Bandera TX-Atascosa TX-Kendall TX-Wilson TX-Bexar TX-
Comal TX-
817 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR EASTERN MEDINA...SOUTHEASTERN BANDERA...NORTHWESTERN ATASCOSA...
SOUTHEASTERN KENDALL...WEST CENTRAL WILSON...BEXAR AND CENTRAL COMAL
COUNTIES...

At 817 PM CDT, a severe thunderstorm was located near Sea World, or 9
miles northeast of Castroville, moving east at 30 mph.

HAZARD...Two inch hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
San Antonio, Schertz, Universal City, Live Oak, Boerne, Selma,
Devine, Castroville, Stinson Municipal Airport, San Antonio Int
Airport, Randolph AFB, Canyon Lake, Leon Valley, Helotes, Fair Oaks
Ranch, Kirby, Alamo Heights, Windcrest, Terrell Hills and Bulverde.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

This storm is producing destructive winds and large damaging hail.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2917 9899 2966 9900 2995 9827 2962 9826
      2959 9831 2956 9830 2954 9825 2955 9825
      2905 9823
TIME...MOT...LOC 0117Z 265DEG 27KT 2942 9874 

HAIL...2.00IN
WIND...70MPH
 
$$

BRADY

295 
WWUS54 KEWX 290129
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
829 PM CDT Wed Apr 28 2021

TXC013-019-029-091-259-325-493-290200-
/O.CON.KEWX.SV.W.0067.000000T0000Z-210429T0200Z/
Medina TX-Bandera TX-Atascosa TX-Kendall TX-Wilson TX-Bexar TX-
Comal TX-
829 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR EASTERN MEDINA...SOUTHEASTERN BANDERA...NORTHWESTERN ATASCOSA...
SOUTHEASTERN KENDALL...WEST CENTRAL WILSON...BEXAR AND CENTRAL COMAL
COUNTIES...

At 829 PM CDT, a severe thunderstorm was located near Lackland AFB,
or near San Antonio, moving east at 45 mph.

This is a very dangerous storm.

HAZARD...Baseball size hail and 70 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be severely injured. 
         Expect shattered windows, extensive damage to roofs, 
         siding, and vehicles.

Locations impacted include...
San Antonio, Schertz, Universal City, Live Oak, Boerne, Selma,
Devine, Castroville, Stinson Municipal Airport, San Antonio Int
Airport, Randolph AFB, Canyon Lake, Leon Valley, Helotes, Fair Oaks
Ranch, Kirby, Alamo Heights, Windcrest, Terrell Hills and Bulverde.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

This storm is producing destructive winds and large damaging hail.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2917 9899 2966 9900 2995 9827 2962 9826
      2959 9831 2956 9830 2954 9825 2955 9825
      2905 9823
TIME...MOT...LOC 0129Z 269DEG 40KT 2942 9858 

HAIL...2.75IN
WIND...70MPH
 
$$

BRADY

956 
WWUS54 KEWX 290142
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
842 PM CDT Wed Apr 28 2021

TXC019-259-290151-
/O.CAN.KEWX.SV.W.0067.000000T0000Z-210429T0200Z/
Bandera TX-Kendall TX-
842 PM CDT Wed Apr 28 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN BANDERA AND
SOUTHEASTERN KENDALL COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

LAT...LON 2919 9893 2956 9894 2961 9888 2995 9827
      2962 9826 2959 9831 2956 9830 2954 9825
      2916 9824
TIME...MOT...LOC 0141Z 242DEG 33KT 2948 9861 

$$

TXC013-029-091-325-493-290200-
/O.CON.KEWX.SV.W.0067.000000T0000Z-210429T0200Z/
Medina TX-Atascosa TX-Wilson TX-Bexar TX-Comal TX-
842 PM CDT Wed Apr 28 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTHEASTERN MEDINA...NORTHWESTERN ATASCOSA...WEST CENTRAL
WILSON...BEXAR AND CENTRAL COMAL COUNTIES...

At 841 PM CDT, a severe thunderstorm was located over Leon Valley, or
near San Antonio, moving northeast at 40 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
San Antonio, Schertz, Universal City, Live Oak, Selma, Castroville,
Stinson Municipal Airport, San Antonio Int Airport, Randolph AFB,
Canyon Lake, Leon Valley, Helotes, Fair Oaks Ranch, Kirby, Alamo
Heights, Windcrest, Terrell Hills, Bulverde, Garden Ridge and Shavano
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 1100 PM CDT for south central
Texas.

This storm is producing destructive winds and large damaging hail.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2919 9893 2956 9894 2961 9888 2995 9827
      2962 9826 2959 9831 2956 9830 2954 9825
      2916 9824
TIME...MOT...LOC 0141Z 242DEG 33KT 2948 9861 

HAIL...1.75IN
WIND...60MPH
 
$$

BRADY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 7:00 PM CDT	Tornado Warning	EWX	Medina, Uvalde	30 min
Apr 28, 7:10 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Uvalde	65 min
Apr 28, 7:22 PM CDT	Special Weather Statement	EWX	Maverick	38 min
Apr 28, 7:26 PM CDT	Tornado Warning Tornado observed	EWX	Bandera, Bexar, Medina	34 min
Apr 28, 7:29 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Real, Uvalde	61 min
Apr 28, 7:55 PM CDT	Special Weather Statement	EWX	Uvalde	50 min
Apr 28, 7:55 PM CDT	Tornado Warning	EWX	Atascosa, Bexar, Medina	50 min
Apr 28, 8:07 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick, Uvalde, Zavala	53 min
Apr 28, 8:12 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Uvalde	51 min
Apr 28, 8:45 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Uvalde	20 min
Apr 28, 8:46 PM CDT	Areal Flood Advisory	EWX	Bandera, Bexar, Medina	3 hr
Apr 28, 8:49 PM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde, Zavala	56 min
Apr 28, 8:55 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe, Wilson	65 min
Apr 28, 9:17 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	23 min
Apr 28, 9:18 PM CDT	Flash Flood Warning	EWX	Bexar	3 hr
Apr 28, 9:27 PM CDT	Special Weather Statement	EWX	Bexar	48 min
Apr 28, 9:30 PM CDT	Tornado Warning	EWX	Bexar, Comal, Guadalupe	30 min
Apr 28, 9:37 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Frio, Medina	42 min
Apr 28, 9:53 PM CDT	Severe Thunderstorm Warning	EWX	Comal, Guadalupe, Hays	40 min
Apr 28, 9:57 PM CDT	Tornado Warning	EWX	Comal, Guadalupe, Hays	20 min
Apr 28, 10:12 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kerr, Kinney, Real, Uvalde	63 min
Apr 28, 10:21 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, Hays, Travis	22 min
Apr 28, 11:02 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde	43 min
Apr 28, 11:08 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kendall, Kerr	14 min
Apr 28, 11:16 PM CDT	Special Weather Statement	EWX	Kinney	44 min
Apr 28, 11:20 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	55 min
Apr 28, 11:31 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	44 min
Apr 28, 11:36 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Real, Uvalde	54 min
Apr 28, 11:41 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kendall, Kerr	49 min
Apr 28, 11:43 PM CDT	Severe Thunderstorm Warning	EWX	Maverick, Zavala	47 min
Apr 29, 12:01 AM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick, Uvalde, Zavala	44 min
Apr 29, 12:14 AM CDT	Severe Thunderstorm Warning	EWX	Uvalde, Zavala	46 min
Apr 29, 12:27 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr, Medina, Uvalde	63 min
Apr 29, 12:30 AM CDT	Special Weather Statement	EWX	Gillespie	45 min
Apr 29, 12:36 AM CDT	Severe Thunderstorm Warning	EWX	Frio, Medina, Uvalde, Zavala	54 min
Apr 29, 12:48 AM CDT	Special Weather Statement	EWX	Dimmit	42 min
Apr 29, 12:59 AM CDT	Tornado Warning	EWX	Frio, Zavala	14 min
Apr 29, 1:03 AM CDT	Tornado Warning	EWX	Frio, Medina, Uvalde	27 min
Apr 29, 1:07 AM CDT	Severe Thunderstorm Warning	EWX	Medina, Uvalde	53 min
Apr 29, 1:22 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Frio, Medina	53 min
Apr 29, 1:28 AM CDT	Special Weather Statement	EWX	Kendall	47 min
Apr 29, 1:33 AM CDT	Tornado Warning	EWX	Medina	17 min
Apr 29, 1:48 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Medina, Wilson	21 min
Apr 29, 2:05 AM CDT	Areal Flood Advisory	EWX	Atascosa, Bandera, Bexar, Medina, Uvalde	3 hr
Apr 29, 2:09 AM CDT	Special Weather Statement	EWX	Bexar, Guadalupe, Wilson	51 min
Apr 29, 2:18 AM CDT	Areal Flood Advisory	EWX	Bandera, Kendall, Kerr	3 hr
Apr 29, 3:54 AM CDT	Special Weather Statement	EWX	Wilson	36 min
Apr 29, 5:13 AM CDT	Special Weather Statement	EWX	Kendall	32 min
Apr 29, 5:20 AM CDT	Special Weather Statement	EWX	Comal	25 min
Apr 29, 2:22 PM CDT	River Flood Warning	EWX	Bexar	6 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every 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.