Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 10, NWS Brownsville, TX

May 12, 2021Cameron County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 12, 2021, 1:40 AM CDT for Cameron County, Texas. It was in force for 49 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 12, 2021, 1:40 AM CDT (06:40 UTC)
Expired
May 12, 2021, 2:29 AM CDT
In force
49 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Hail
0.75 in
Wind
80.0 mph

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 17 km from the middle of the area, began a volume at 06:43 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

TimeReportWhereRemark
May 12, 1:45 AM CDTTSTM WND DMGLa Feria, TXREPORT RECEIVED VIA SOCIAL MEDIA OF A PALM TREE UPROOTED IN LA FERIA. TIME ESTIMATED VIA RADAR.
May 12, 2:18 AM CDTTSTM WND DMG1 Nnw Brownsville, TXNWS EMPLOYEE REPORTED SEVERAL TREE LIMBS WITH 5 INCH DIAMETER SNAPPED OFF TREES IN HIS NEIGHBORHOOD. TIME ESTIMATED VIA RADAR.

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.

IssuedProductOfficeLasted
May 11, 8:34 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 6.7 hours before the alert went out and 19 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-pSkew-T log-p diagram, Brownsville Intl, TX at 00:00Z on 2021-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2611 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brownsville Intl, TX at 00:00Z on 2021-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2611 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
772 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

As transmitted.

401 
WUUS54 KBRO 120640
SVRBRO
TXC061-120745-
/O.NEW.KBRO.SV.W.0010.210512T0640Z-210512T0745Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
140 AM CDT Wed May 12 2021

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Cameron County in Deep South Texas...

* Until 245 AM CDT.

* At 140 AM CDT, a severe thunderstorm was located over Santa Maria
  High School, or near Santa Maria, moving east at 30 mph.

  This is a very dangerous storm.

  HAZARD...80 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be heavily damaged. Expect 
           considerable damage to roofs, windows, and vehicles. 
           Extensive tree damage and power outages are likely.

* Locations impacted include...
  Harlingen, San Benito, La Feria, Los Fresnos, Santa Rosa, Rancho
  Viejo, Rio Hondo, Palm Valley, Los Indios and Olmito.

This includes the following highways...
 Interstate Highway 69 E between mile markers 1 and 33.
 US Highway 281 between mile markers 814 and 838.

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 2585 9745 2588 9746 2588 9750 2590 9750
      2589 9752 2592 9753 2594 9758 2602 9767
      2603 9766 2602 9774 2605 9777 2603 9779
      2606 9780 2605 9786 2628 9786 2628 9737
      2592 9736 2591 9737 2589 9736 2584 9737
TIME...MOT...LOC 0640Z 269DEG 24KT 2610 9781 

HAIL...<.75IN
WIND...80MPH
 
$$

TOMASELLI
2 follow-up statements
904 
WWUS54 KBRO 120707 RRA
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
207 AM CDT Wed May 12 2021

TXC061-120745-
/O.CON.KBRO.SV.W.0010.000000T0000Z-210512T0745Z/
Cameron TX-
207 AM CDT Wed May 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 AM CDT
FOR CAMERON COUNTY...

At 207 AM CDT, a severe thunderstorm was located over Miller Jordan
Middle School, or over San Benito, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Harlingen, San Benito, La Feria, Los Fresnos, Santa Rosa, Rancho
Viejo, Rio Hondo, Palm Valley, Los Indios and Olmito.

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 2585 9745 2588 9746 2588 9750 2590 9750
      2589 9752 2592 9753 2594 9758 2602 9767
      2603 9766 2602 9774 2605 9777 2603 9779
      2606 9780 2605 9786 2628 9786 2628 9737
      2592 9736 2591 9737 2589 9736 2584 9737
TIME...MOT...LOC 0707Z 269DEG 24KT 2610 9761 

HAIL...<.75IN
WIND...60MPH
 
$$

TOMASELLI
557 
WWUS54 KBRO 120729
SVSBRO

Severe Weather Statement
National Weather Service Brownsville TX
229 AM CDT Wed May 12 2021

TXC061-120739-
/O.CAN.KBRO.SV.W.0010.000000T0000Z-210512T0745Z/
Cameron TX-
229 AM CDT Wed May 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR CAMERON COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

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

LAT...LON 2585 9745 2588 9746 2588 9750 2590 9750
      2589 9752 2592 9753 2594 9758 2602 9767
      2603 9766 2602 9774 2605 9777 2603 9779
      2606 9780 2605 9786 2628 9786 2628 9737
      2592 9736 2591 9737 2589 9736 2584 9737
TIME...MOT...LOC 0728Z 269DEG 24KT 2610 9745 

$$

TOMASELLI

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 8:51 PM CDTSpecial Weather StatementBROZapata39 min
May 11, 9:11 PM CDTSevere Thunderstorm WarningBROJim Hogg, Zapata49 min
May 11, 9:39 PM CDTSpecial Weather StatementBROZapata51 min
May 11, 9:48 PM CDTSevere Thunderstorm WarningBROZapata42 min
May 11, 9:54 PM CDTSevere Thunderstorm WarningBROBrooks, Jim Hogg51 min
May 11, 10:26 PM CDTSevere Thunderstorm WarningBROStarr, Zapata49 min
May 11, 10:45 PM CDTSpecial Weather StatementBROBrooks, Kenedy60 min
May 11, 11:04 PM CDTAreal Flood AdvisoryBROZapata4 hr
May 11, 11:14 PM CDTSevere Thunderstorm WarningBROStarr, Zapata46 min
May 11, 11:21 PM CDTAreal Flood AdvisoryBROJim Hogg, Starr, Zapata4 hr
May 11, 11:22 PM CDTAreal Flood AdvisoryBROJim Hogg, Zapata94 min
May 11, 11:51 PM CDTSpecial Weather StatementBROHidalgo, Kenedy, Starr54 min
May 11, 11:56 PM CDTSevere Thunderstorm WarningBROStarr36 min
May 12, 12:06 AM CDTAreal Flood AdvisoryBROStarr3 hr
May 12, 12:21 AM CDTAreal Flood AdvisoryBROBrooks, Hidalgo, Starr3 hr
May 12, 12:25 AM CDTAreal Flood AdvisoryBROStarr3 hr
May 12, 12:28 AM CDTSpecial Weather StatementBROHidalgo62 min
May 12, 12:38 AM CDTSpecial Weather StatementBROStarr52 min
May 12, 12:44 AM CDTSevere Thunderstorm WarningBROHidalgo, Willacy30 min
May 12, 12:50 AM CDTSpecial Weather StatementBROKenedy55 min
May 12, 1:00 AM CDTSevere Thunderstorm WarningBROKenedy60 min
May 12, 1:04 AM CDTSevere Thunderstorm WarningBROCameron, Hidalgo41 min
May 12, 1:12 AM CDTAreal Flood AdvisoryBROHidalgo, Starr3 hr
May 12, 1:12 AM CDTSpecial Marine WarningBRO48 min
May 12, 1:19 AM CDTAreal Flood AdvisoryBROHidalgo, Willacy3 hr
May 12, 1:34 AM CDTSpecial Marine WarningBRO26 min
May 12, 1:46 AM CDTAreal Flood AdvisoryBROCameron, Hidalgo3 hr
May 12, 1:50 AM CDTSevere Thunderstorm WarningBROHidalgo40 min
May 12, 1:53 AM CDTSpecial Marine WarningBRO22 min
May 12, 2:24 AM CDTAreal Flood AdvisoryBROCameron3 hr
May 12, 2:27 AM CDTSpecial Weather StatementBROCameron63 min
May 12, 2:39 AM CDTSpecial Marine WarningBRO41 min
May 12, 2:40 AM CDTSevere Thunderstorm WarningBROCameron34 min
May 12, 2:51 AM CDTSevere Thunderstorm WarningBROCameron39 min
May 12, 3:31 AM CDTSpecial Weather StatementBROCameron59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every 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.