Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS Brownsville, TX

May 11, 2021Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 11, 2021, 9:48 PM CDT for Zapata County, Texas. It was in force for 42 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 11, 2021, 9:48 PM CDT (02:48 UTC)
Expired: May 11, 2021, 10:30 PM CDT
In force: 42 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 50.0 mph

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 202 km from the middle of the area, began a volume at 02:50 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 11, 10:10 PM CDT	TSTM WND DMG	2 Nnw Zapata, TX	ZAPATA FIRE DEPARTMENT REPORTED MULTIPLE DOWNED POWER LINES AND TELEPHONE POLES ALONG WITH ROOF DAMAGE TO MULTIPLE HOMES IN THE CITY OF ZAPATA.
May 11, 10:15 PM CDT	TSTM WND DMG	Zapata, TX	TREE LIMB DAMAGE REPORTED IN THE TOWN OF ZAPATA. REPORTED THROUGH SOCIAL MEDIA.

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 11, 8:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 2.8 hours before the alert went out and 215 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: 2320 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 854 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted.

746 
WUUS54 KBRO 120248
SVRBRO
TXC505-120330-
/O.NEW.KBRO.SV.W.0002.210512T0248Z-210512T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
948 PM CDT Tue May 11 2021

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Central Zapata County in Deep South Texas...

* Until 1030 PM CDT.

* At 948 PM CDT, a severe thunderstorm was located near Las Palmas,
  or near Zapata, moving southeast at 20 mph.

  HAZARD...Half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Zapata, Lopeno, Medina, Zapata High School, Zapata County Fire
  Department, Zapata Middle School, Siesta Shores, Zapata County
  Public Library, Las Palmas and Falcon Mesa.

This includes US Highway 83 between mile markers 756 and 784.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2708 9931 2684 9896 2663 9918 2666 9920
      2672 9921 2675 9924 2679 9924 2682 9926
      2685 9927 2686 9929 2687 9932 2688 9933
      2690 9932 2692 9933 2693 9937 2694 9939
      2696 9939 2698 9938 2700 9940
TIME...MOT...LOC 0248Z 316DEG 18KT 2696 9932 

HAIL...1.25IN
WIND...<50MPH
 
$$

Farris

1 follow-up statement

686 
WWUS54 KBRO 120309
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
1009 PM CDT Tue May 11 2021

TXC505-120330-
/O.CON.KBRO.SV.W.0002.000000T0000Z-210512T0330Z/
Zapata TX-
1009 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN ZAPATA COUNTY...

At 1008 PM CDT, a severe thunderstorm was located over Falcon Shores,
or over Zapata, moving southeast at 20 mph.

HAZARD...Golf ball size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Zapata, Lopeno, Medina, Zapata High School, Zapata County Fire
Department, Zapata Middle School, Siesta Shores, Zapata County Public
Library, Falcon Mesa and Morales-Sanchez.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large 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.

&&

LAT...LON 2699 9922 2684 9896 2663 9918 2666 9920
      2672 9921 2675 9924 2679 9924 2682 9926
      2685 9927 2686 9929 2687 9932 2688 9933
      2690 9932
TIME...MOT...LOC 0308Z 316DEG 18KT 2689 9924 

HAIL...1.75IN
WIND...<50MPH
 
$$

Farris

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 8:51 PM CDT	Special Weather Statement	BRO	Zapata	39 min
May 11, 9:11 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg, Zapata	49 min
May 11, 9:39 PM CDT	Special Weather Statement	BRO	Zapata	51 min
May 11, 9:54 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg	51 min
May 11, 10:26 PM CDT	Severe Thunderstorm Warning	BRO	Starr, Zapata	49 min
May 11, 10:45 PM CDT	Special Weather Statement	BRO	Brooks, Kenedy	60 min
May 11, 11:04 PM CDT	Areal Flood Advisory	BRO	Zapata	4 hr
May 11, 11:14 PM CDT	Severe Thunderstorm Warning	BRO	Starr, Zapata	46 min
May 11, 11:21 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Starr, Zapata	4 hr
May 11, 11:22 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	94 min
May 11, 11:51 PM CDT	Special Weather Statement	BRO	Hidalgo, Kenedy, Starr	54 min
May 11, 11:56 PM CDT	Severe Thunderstorm Warning	BRO	Starr	36 min
May 12, 12:06 AM CDT	Areal Flood Advisory	BRO	Starr	3 hr
May 12, 12:21 AM CDT	Areal Flood Advisory	BRO	Brooks, Hidalgo, Starr	3 hr
May 12, 12:25 AM CDT	Areal Flood Advisory	BRO	Starr	3 hr
May 12, 12:28 AM CDT	Special Weather Statement	BRO	Hidalgo	62 min
May 12, 12:38 AM CDT	Special Weather Statement	BRO	Starr	52 min
May 12, 12:44 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Willacy	30 min
May 12, 12:50 AM CDT	Special Weather Statement	BRO	Kenedy	55 min
May 12, 1:00 AM CDT	Severe Thunderstorm Warning	BRO	Kenedy	60 min
May 12, 1:04 AM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo	41 min
May 12, 1:12 AM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	3 hr
May 12, 1:12 AM CDT	Special Marine Warning	BRO		48 min
May 12, 1:19 AM CDT	Areal Flood Advisory	BRO	Hidalgo, Willacy	3 hr
May 12, 1:34 AM CDT	Special Marine Warning	BRO		26 min
May 12, 1:40 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	49 min
May 12, 1:46 AM CDT	Areal Flood Advisory	BRO	Cameron, Hidalgo	3 hr
May 12, 1:50 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	40 min
May 12, 1:53 AM CDT	Special Marine Warning	BRO		22 min
May 12, 2:24 AM CDT	Areal Flood Advisory	BRO	Cameron	3 hr
May 12, 2:27 AM CDT	Special Weather Statement	BRO	Cameron	63 min
May 12, 2:39 AM CDT	Special Marine Warning	BRO		41 min
May 12, 2:40 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	34 min
May 12, 2:51 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	39 min
May 12, 3:31 AM CDT	Special Weather Statement	BRO	Cameron	59 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.