Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 75, NWS Brownsville, TX

May 12, 2012Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 12, 2012, 3:12 AM CDT for Zapata County, Texas. It was in force for 63 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 12, 2012, 3:12 AM CDT (08:12 UTC)
Expired
May 12, 2012, 4:15 AM CDT
In force
63 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon

County Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 196 km from the middle of the area, began a volume at 08:14 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, 8.2 hours before the alert went out and 210 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, Corpus Christi, TX at 00:00Z on 2012-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2310 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, Corpus Christi, TX at 00:00Z on 2012-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -13 square meters per square second.19395878Sfc1 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
2310 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
792 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
-13 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

633 
WUUS54 KBRO 120812
SVRBRO
TXC505-120915-
/O.NEW.KBRO.SV.W.0075.120512T0812Z-120512T0915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
312 AM CDT SAT MAY 12 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ZAPATA COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 415 AM CDT

* AT 312 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND   
  DAMAGING 60 MPH WINDS...16 MILES NORTH OF BUSTAMANTE...NEARLY      
  STATIONARY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ESCOBA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&

LAT...LON 2732 9937 2728 9933 2727 9896 2705 9896
      2691 9933 2694 9939 2697 9940 2698 9939
      2701 9942 2701 9943 2707 9944 2710 9944
      2711 9945 2719 9943 2727 9946
TIME...MOT...LOC 0812Z 270DEG 12KT 2723 9904

$$

CACERES
2 follow-up statements
462 
WWUS54 KBRO 120845
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
345 AM CDT SAT MAY 12 2012

TXC505-120915-
/O.CON.KBRO.SV.W.0075.000000T0000Z-120512T0915Z/
ZAPATA-
345 AM CDT SAT MAY 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 AM CDT
FOR NORTHERN ZAPATA COUNTY...

THE SEVERE THUNDERSTORM WILL BE NEAR...
  LAS PALMAS.
  BUSTAMANTE.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  QUARTER SIZE HAIL.
  60 MPH WIND GUSTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2732 9937 2728 9933 2727 9896 2705 9896
      2691 9933 2694 9939 2697 9940 2698 9939
      2701 9942 2701 9943 2707 9944 2710 9944
      2711 9945 2719 9943 2727 9946
TIME...MOT...LOC 0844Z 239DEG 1KT 2715 9924

$$

CACERES
042 
WWUS54 KBRO 120918
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
418 AM CDT SAT MAY 12 2012

TXC505-120927-
/O.EXP.KBRO.SV.W.0075.000000T0000Z-120512T0915Z/
ZAPATA-
418 AM CDT SAT MAY 12 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ZAPATA COUNTY HAS
EXPIRED...


LAT...LON 2732 9937 2728 9933 2727 9896 2705 9896
      2691 9933 2694 9939 2697 9940 2698 9939
      2701 9942 2701 9943 2707 9944 2710 9944
      2711 9945 2719 9943 2727 9946
TIME...MOT...LOC 0845Z 239DEG 1KT 2715 9924

$$

CACERES

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 7:06 PM CDTSevere Thunderstorm WarningBROBrooks39 min
May 11, 10:50 PM CDTAreal Flood AdvisoryBROZapata55 min
May 12, 1:42 AM CDTAreal Flood AdvisoryBROZapata63 min
May 12, 2:13 AM CDTSevere Thunderstorm WarningBROZapata62 min
May 12, 2:28 AM CDTFlash Flood WarningBROZapata92 min
May 12, 3:58 AM CDTFlash Flood WarningBROZapata92 min
May 12, 4:03 PM CDTSevere Thunderstorm WarningBROWillacy42 min
May 12, 4:50 PM CDTSevere Thunderstorm WarningBROWillacy40 min
May 12, 4:57 PM CDTAreal Flood AdvisoryBROWillacy63 min
May 12, 5:20 PM CDTSevere Thunderstorm WarningBROCameron25 min
May 12, 5:24 PM CDTAreal Flood AdvisoryBROCameron, Hidalgo, Willacy66 min
May 12, 5:43 PM CDTSevere Thunderstorm WarningBROCameron32 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012Every severe thunderstorm warning in 2012

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.