Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 118, NWS Austin/San Antonio, TX

May 11, 2021Atascosa County, Bexar County, Wilson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 11, 2021, 4:59 PM CDT for Atascosa County, Bexar County, Wilson County, Texas. It was in force for 61 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, 4:59 PM CDT (21:59 UTC)
Expired: May 11, 2021, 6:00 PM CDT
In force: 61 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Atascosa County, TX, Bexar County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 83 km from the middle of the area, began a volume at 21:58 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

Corpus Christi, TX (KCRP), launched 12:00Z, 10.0 hours before the alert went out and 199 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: 1953 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 825 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: 33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -2.5

Open this sounding in Storm Lab

The text

As transmitted.

081 
WUUS54 KEWX 112159
SVREWX
TXC013-029-493-112300-
/O.NEW.KEWX.SV.W.0118.210511T2159Z-210511T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Austin/San Antonio TX
459 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...
  West central Wilson County in south central Texas...
  South central Bexar County in south central Texas...

* Until 600 PM CDT.

* At 459 PM CDT, a severe thunderstorm was located 8 miles east of
  Bigfoot, or 8 miles west of Poteet, moving northeast at 20 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Poteet, Somerset, Elmendorf, Leming, Sandy Oaks, Buena Vista, Iuka,
  Mitchell Lake, Losoya, Southton, Canada Verde, Kyote, Thelma,
  Amphion, Espey, Rossville and Braunig Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 2915 9880 2936 9835 2912 9821 2893 9880
TIME...MOT...LOC 2159Z 238DEG 20KT 2905 9872 

HAIL...1.00IN
WIND...<50MPH
 
$$

1 follow-up statement

686 
WWUS54 KEWX 112254
SVSEWX

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

TXC013-029-493-112303-
/O.EXP.KEWX.SV.W.0118.000000T0000Z-210511T2300Z/
Atascosa TX-Wilson TX-Bexar TX-
554 PM CDT Tue May 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ATASCOSA...WEST
CENTRAL WILSON AND SOUTH CENTRAL BEXAR COUNTIES WILL EXPIRE AT 600 PM
CDT...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning will be allowed to expire.

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

LAT...LON 2915 9880 2936 9835 2912 9821 2893 9880
TIME...MOT...LOC 2253Z 238DEG 20KT 2921 9844 

$$

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, 5:20 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar	25 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.