Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Brownsville, TX

May 18, 2021Brooks County, Jim Hogg County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 18, 2021, 12:26 AM CDT for Brooks County, Jim Hogg County, Texas. It was in force for 34 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 18, 2021, 12:26 AM CDT (05:26 UTC)
Expired: May 18, 2021, 1:00 AM CDT
In force: 34 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Brooks County, TX, Jim Hogg County, TX

The radar

The Corpus Christi radar (KCRP), 124 km from the middle of the area, began a volume at 05:30 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 nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.4 hours before the alert went out and 136 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: 2541 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

452 
WUUS54 KBRO 180526
SVRBRO
TXC047-247-180600-
/O.NEW.KBRO.SV.W.0018.210518T0526Z-210518T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
1226 AM CDT Tue May 18 2021

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Jim Hogg County in Deep South Texas...
  Northwestern Brooks County in Deep South Texas...

* Until 100 AM CDT.

* At 1226 AM CDT, a severe thunderstorm was located 8 miles south of
  South Fork Estates, or 10 miles south of Hebbronville, moving east
  at 35 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...
  Hebbronville, Agua Nueva, Las Lomitas, Gruy Stadium, 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.

Large hail and damaging winds and 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 2734 9855 2734 9852 2727 9852 2726 9830
      2706 9834 2688 9847 2694 9889 2720 9885
      2727 9886 2727 9880 2735 9880 2736 9863
      2734 9862 2734 9859 2736 9859 2736 9855
TIME...MOT...LOC 0526Z 283DEG 30KT 2715 9868 

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

Hallman

2 follow-up statements

055 
WWUS54 KBRO 180537
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
1237 AM CDT Tue May 18 2021

TXC047-247-180600-
/O.CON.KBRO.SV.W.0018.000000T0000Z-210518T0600Z/
Jim Hogg TX-Brooks TX-
1237 AM CDT Tue May 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR CENTRAL JIM HOGG AND NORTHWESTERN BROOKS COUNTIES...

At 1237 AM CDT, a severe thunderstorm was located 13 miles southeast
of South Fork Estates, or 14 miles southeast of Hebbronville, moving
east at 35 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...
Hebbronville, Agua Nueva, Las Lomitas, Gruy Stadium, 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.

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 2734 9855 2734 9852 2727 9852 2726 9830
      2706 9834 2688 9847 2692 9876 2700 9878
      2720 9875 2727 9880 2735 9880 2736 9863
      2734 9862 2734 9859 2736 9859 2736 9855
TIME...MOT...LOC 0537Z 283DEG 30KT 2713 9858 

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

Hallman

439 
WWUS54 KBRO 180553
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
1253 AM CDT Tue May 18 2021

TXC047-247-180600-
/O.CON.KBRO.SV.W.0018.000000T0000Z-210518T0600Z/
Jim Hogg TX-Brooks TX-
1253 AM CDT Tue May 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM CDT
FOR EASTERN JIM HOGG AND NORTHWESTERN BROOKS COUNTIES...

At 1253 AM CDT, a severe thunderstorm was located 17 miles south of
Ramirez, or 17 miles northeast of Agua Nueva, moving east at 35 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

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...
Hebbronville, Agua Nueva, Las Lomitas, Gruy Stadium, Hebbronville
High School and Hebbronville Border Patrol Station.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 2734 9855 2734 9852 2727 9852 2726 9830
      2706 9834 2688 9847 2691 9869 2700 9875
      2719 9869 2725 9871 2735 9872 2736 9863
      2734 9862 2734 9859 2736 9859 2736 9855
TIME...MOT...LOC 0553Z 283DEG 30KT 2710 9843 

HAIL...1.50IN
WIND...70MPH
 
$$

Hallman

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 10:58 PM CDT	Special Weather Statement	BRO	Zapata	32 min
May 17, 11:20 PM CDT	Special Weather Statement	BRO	Zapata	25 min
May 17, 11:42 PM CDT	Special Weather Statement	BRO	Zapata	33 min
May 17, 11:44 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	112 min
May 18, 12:13 AM CDT	Special Weather Statement	BRO	Jim Hogg	32 min
May 18, 12:18 AM CDT	Areal Flood Advisory	BRO	Jim Hogg	3 hr
May 18, 12:43 AM CDT	Areal Flood Advisory	BRO	Jim Hogg	3 hr
May 18, 12:58 AM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg	32 min
May 18, 1:08 AM CDT	Areal Flood Advisory	BRO	Brooks, Jim Hogg	3 hr
May 18, 1:29 AM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	31 min
May 18, 1:41 AM CDT	Areal Flood Advisory	BRO	Brooks	3 hr
May 18, 2:00 AM CDT	Special Weather Statement	BRO	Brooks	30 min
May 18, 2:02 AM CDT	Areal Flood Advisory	BRO	Brooks, Kenedy	3 hr
May 18, 3:10 AM CDT	Special Marine Warning	BRO		2 hr
May 18, 5:15 AM CDT	Flash Flood Watch	BRO	Brooks, Cameron, Hidalgo, Jim Hogg, Kenedy, Starr and 2 more	38 hr
May 18, 3:54 PM CDT	Small Craft Advisory	BRO		26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.