Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 119, NWS Austin/San Antonio, TX

May 11, 2021Atascosa County, Bexar County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 11, 2021, 5:20 PM CDT for Atascosa County, Bexar County, Texas. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 11, 2021, 5:20 PM CDT (22:20 UTC)
Expired: May 11, 2021, 5:45 PM CDT
In force: 25 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Atascosa County, TX, Bexar County, TX

The radar

The Austin/San Antonio radar (KEWX), 90 km from the middle of the area, began a volume at 22:21 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 11, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 10.3 hours before the alert went out and 205 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: 1783 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 149 m²/s²
0-3 km storm-relative helicity: 277 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 12.9

Open this sounding in Storm Lab

The text

As transmitted.

475 
WUUS54 KEWX 112220
SVREWX
TXC013-029-112245-
/O.NEW.KEWX.SV.W.0119.210511T2220Z-210511T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
520 PM CDT Tue May 11 2021

The National Weather Service in Austin San Antonio has issued a

* Severe Thunderstorm Warning for...
  Northwestern Atascosa County in south central Texas...
  Southwestern Bexar County in south central Texas...

* Until 545 PM CDT.

* At 520 PM CDT, a severe thunderstorm was located near Lytle, or 10
  miles east of Devine, moving north 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...
  Lytle, Somerset, Von Ormy, Iuka and Rossville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

LAT...LON 2927 9880 2928 9864 2905 9863 2904 9880
TIME...MOT...LOC 2220Z 187DEG 22KT 2919 9874 

HAIL...1.00IN
WIND...60MPH
 
$$

1 follow-up statement

755 
WWUS54 KEWX 112251
SVSEWX

Severe Weather Statement
National Weather Service Austin/San Antonio TX
551 PM CDT Tue May 11 2021

TXC013-029-112301-
/O.EXP.KEWX.SV.W.0119.000000T0000Z-210511T2245Z/
Atascosa TX-Bexar TX-
551 PM CDT Tue May 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ATASCOSA AND
SOUTHWESTERN BEXAR COUNTIES HAS EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
south central Texas.

LAT...LON 2927 9880 2928 9864 2905 9863 2904 9880
TIME...MOT...LOC 2251Z 187DEG 22KT 2937 9871 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:14 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	16 min
May 10, 7:49 PM CDT	Areal Flood Advisory	EWX	Dimmit, Maverick	3 hr
May 10, 7:55 PM CDT	Special Weather Statement	EWX	Kinney	50 min
May 10, 8:00 PM CDT	Special Weather Statement	EWX	Dimmit, Maverick, Zavala	45 min
May 10, 8:06 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Maverick, Real, Uvalde, Zavala	54 min
May 10, 8:31 PM CDT	Tornado Warning	EWX	Kinney, Uvalde	16 min
May 10, 8:52 PM CDT	Special Weather Statement	EWX	Frio, Zavala	38 min
May 10, 8:58 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kerr, Kinney, Medina, Real and 1 more	62 min
May 10, 9:09 PM CDT	Areal Flood Advisory	EWX	Dimmit, Zavala	3 hr
May 10, 9:20 PM CDT	Areal Flood Advisory	EWX	Kinney, Maverick, Uvalde, Zavala	3 hr
May 10, 9:30 PM CDT	Special Weather Statement	EWX	Frio, Medina	60 min
May 10, 9:52 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Medina, Uvalde	53 min
May 10, 10:42 PM CDT	Areal Flood Advisory	EWX	Medina, Uvalde	3 hr
May 10, 10:45 PM CDT	Special Weather Statement	EWX	Bexar	45 min
May 10, 11:17 PM CDT	Special Weather Statement	EWX	Bexar	43 min
May 11, 3:51 PM CDT	Areal Flood Advisory	EWX	Kendall	2 hr
May 11, 4:03 PM CDT	Special Weather Statement	EWX	Atascosa	42 min
May 11, 4:23 PM CDT	Special Weather Statement	EWX	Caldwell	52 min
May 11, 4:24 PM CDT	Special Weather Statement	EWX	Guadalupe	51 min
May 11, 4:45 PM CDT	Special Weather Statement	EWX	Atascosa	45 min
May 11, 4:59 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar, Wilson	61 min
May 11, 5:30 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Frio, Medina	3 hr
May 11, 5:46 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Medina	44 min
May 11, 5:47 PM CDT	Special Weather Statement	EWX	Guadalupe	43 min
May 11, 6:13 PM CDT	Special Weather Statement	EWX	Wilson	47 min
May 11, 6:31 PM CDT	Special Weather Statement	EWX	Dimmit	44 min
May 11, 6:36 PM CDT	Special Weather Statement	EWX	Frio, Medina	39 min
May 11, 6:46 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Karnes, Wilson	38 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.