Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Brownsville, TX

May 11, 2021Jim Hogg County, Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 11, 2021, 9:11 PM CDT for Jim Hogg County, Zapata County, Texas. It was in force for 49 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, 9:11 PM CDT (02:11 UTC)
Expired: May 11, 2021, 10:00 PM CDT
In force: 49 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Jim Hogg County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 130 km from the middle of the area, began a volume at 02:10 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, 8:34 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 2.2 hours before the alert went out and 144 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.

324 
WUUS54 KBRO 120211
SVRBRO
TXC247-505-120300-
/O.NEW.KBRO.SV.W.0001.210512T0211Z-210512T0300Z/

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

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Northern Jim Hogg County in Deep South Texas...
  Northeastern Zapata County in Deep South Texas...

* Until 1000 PM CDT.

* At 910 PM CDT, severe thunderstorms were located along a line
  extending from Bruni to 14 miles northwest of Escobas, moving east
  at 35 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...
  Hebbronville, Las Lomitas, Gruy Stadium, Thompsonville, Jim Hogg
  County Airport, Hebbronville High School, South Fork Estates and
  Hebbronville Border Patrol Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.

&&

LAT...LON 2734 9855 2734 9852 2727 9852 2726 9853
      2724 9849 2709 9871 2708 9900 2716 9932
      2727 9915 2727 9880 2735 9880 2735 9879
      2736 9863 2734 9862 2734 9859 2736 9859
      2736 9855
TIME...MOT...LOC 0210Z 273DEG 32KT 2744 9882 2721 9918 

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

Farris

1 follow-up statement

126 
WWUS54 KBRO 120233
SVSBRO

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

TXC505-120241-
/O.CAN.KBRO.SV.W.0001.000000T0000Z-210512T0300Z/
Zapata TX-
933 PM CDT Tue May 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ZAPATA COUNTY IS
CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 400 AM CDT for
Deep South Texas.

LAT...LON 2734 9855 2734 9852 2727 9852 2726 9853
      2724 9849 2709 9871 2717 9894 2727 9893
      2727 9880 2735 9880 2735 9879 2736 9863
      2734 9862 2734 9859 2736 9859 2736 9855
TIME...MOT...LOC 0231Z 273DEG 32KT 2743 9862 2720 9898 

$$

TXC247-120300-
/O.CON.KBRO.SV.W.0001.000000T0000Z-210512T0300Z/
Jim Hogg TX-
933 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR NORTHERN JIM HOGG COUNTY...

At 931 PM CDT, severe thunderstorms were located along a line
extending from near Realitos to near Thompsonville, moving east at 35
mph.

HAZARD...Two inch hail and 60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Hebbronville, Las Lomitas, Gruy Stadium, Thompsonville, Jim Hogg
County Airport, Hebbronville High School, South Fork Estates and
Hebbronville Border Patrol Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

These storms are producing large hail. SEEK SHELTER NOW inside a
sturdy structure and stay away from windows.

&&

LAT...LON 2734 9855 2734 9852 2727 9852 2726 9853
      2724 9849 2709 9871 2717 9894 2727 9893
      2727 9880 2735 9880 2735 9879 2736 9863
      2734 9862 2734 9859 2736 9859 2736 9855
TIME...MOT...LOC 0231Z 273DEG 32KT 2743 9862 2720 9898 

HAIL...2.00IN
WIND...60MPH
 
$$

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, 9:39 PM CDT	Special Weather Statement	BRO	Zapata	51 min
May 11, 9:48 PM CDT	Severe Thunderstorm Warning	BRO	Zapata	42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.