Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 7, NWS Brownsville, TX

May 12, 2021Hidalgo County, Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 12, 2021, 12:44 AM CDT for Hidalgo County, Willacy County, Texas. It was in force for 30 min. 1 report 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, 12:44 AM CDT (05:44 UTC)
Expired
May 12, 2021, 1:14 AM CDT
In force
30 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Hidalgo County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 79 km from the middle of the area, began a volume at 05:45 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, 12:46 AM CDTTSTM WND GST 603 Se San Manuel, TX60MPH WIND GUST MEASURED AT THE LINN-SAN MANUEL RAWS SITE.

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, 5.7 hours before the alert went out and 81 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°0°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.

669 
WUUS54 KBRO 120544
SVRBRO
TXC215-489-120630-
/O.NEW.KBRO.SV.W.0007.210512T0544Z-210512T0630Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Brownsville TX
1244 AM CDT Wed May 12 2021

The National Weather Service in Brownsville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Hidalgo County in Deep South Texas...
  Western Willacy County in Deep South Texas...

* Until 130 AM CDT.

* At 1244 AM CDT, a severe thunderstorm was located near San Manuel,
  moving southeast at 30 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Raymondville, Edcouch, Lyford, La Villa, Hargill, Lasara, San
  Manuel, Linn, Red Gate and Jose Borrego Middle School.

This includes the following highways...
 Interstate Highway 69 E between mile markers 40 and 49.
 US Highway 281 between mile markers 754 and 762.

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 2624 9792 2656 9819 2668 9804 2664 9798
      2662 9798 2661 9793 2645 9769 2634 9781
      2635 9786 2629 9786
TIME...MOT...LOC 0544Z 317DEG 25KT 2657 9805 

HAIL...1.25IN
WIND...60MPH
 
$$

TOMASELLI
1 follow-up statement
462 
WWUS54 KBRO 120614
SVSBRO

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

TXC215-489-120623-
/O.CAN.KBRO.SV.W.0007.000000T0000Z-210512T0630Z/
Hidalgo TX-Willacy TX-
114 AM CDT Wed May 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN HIDALGO AND
WESTERN WILLACY COUNTIES 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 2624 9792 2656 9819 2668 9804 2664 9798
      2662 9798 2661 9793 2645 9769 2634 9781
      2635 9786 2629 9786
TIME...MOT...LOC 0611Z 317DEG 25KT 2642 9789 

$$

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, 12:50 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, 1:40 AM CDTSevere Thunderstorm WarningBROCameron49 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.