Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 65, NWS Brownsville, TX

May 9, 2012Cameron County, Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 9, 2012, 10:36 PM CDT for Cameron County, Willacy County, Texas. It was in force for 39 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 9, 2012, 10:36 PM CDT (03:36 UTC)
Expired
May 9, 2012, 11:15 PM CDT
In force
39 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon

Counties Cameron County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 54 km from the middle of the area, began a volume at 03:37 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 3.6 hours before the alert went out and 56 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 2012-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2929 joules per kilogram.LCLEL10008507005003002001001 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 2012-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
2929 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
482 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
-12 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

280 
WUUS54 KBRO 100336
SVRBRO
TXC061-489-100415-
/O.NEW.KBRO.SV.W.0065.120510T0336Z-120510T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1036 PM CDT WED MAY 9 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAMERON COUNTY IN DEEP SOUTH TEXAS.
  SOUTHERN WILLACY COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 1115 PM CDT

* AT 1036 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING BASEBALL TO SOFTBALL    
  SIZE HAIL AND DAMAGING 60 MPH WINDS...OVER SOUTHERN WILLACY        
  COUNTY...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SEBASTIAN.
  PORFIRIO.
  SANTA MONICA.
  LA LEONA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM! MOVE INTO AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING...AWAY FROM WINDOWS. COVER YOUR HEAD WITH
PILLOWS OR CUSHIONS.

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 2626 9784 2644 9785 2647 9745 2625 9744
TIME...MOT...LOC 0336Z 267DEG 25KT 2635 9773

$$

SPEECE
1 follow-up statement
927 
WWUS54 KBRO 100417
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1117 PM CDT WED MAY 9 2012

TXC061-489-100425-
/O.EXP.KBRO.SV.W.0065.000000T0000Z-120510T0415Z/
CAMERON-WILLACY-
1117 PM CDT WED MAY 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN WILLACY AND
NORTHWESTERN CAMERON COUNTIES HAS EXPIRED...

AT 1115 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THE 
THUNDERSTORM OVER SOUTHERN WILLACY COUNTY HAS WEAKENED AND WAS NO 
LONGER SEVERE...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

ALTHOUGH THE SEVERE THUNDERSTORM WARNING HAS EXPIRED...DOPPLER RADAR 
INDICATES THAT LOCALLY HEAVY RAIN...SMALL HAIL...AND GUSTY WINDS 
FROM 30 TO 35 MPH WERE STILL POSSIBLE FROM THIS THUNDERSTORM AS IT 
HEADS TOWARDS THE LAGUNA MADRE. 

LAT...LON 2626 9784 2644 9785 2647 9745 2625 9744
TIME...MOT...LOC 0336Z 267DEG 25KT 2635 9773

$$

SPEECE

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 7:48 PM CDTAreal Flood AdvisoryBROHidalgo, Starr87 min
May 9, 9:19 PM CDTAreal Flood AdvisoryBROHidalgo, Willacy86 min
May 9, 9:29 PM CDTSevere Thunderstorm WarningBROHidalgo, Willacy46 min
May 9, 10:02 PM CDTSevere Thunderstorm WarningBROCameron, Hidalgo, Willacy58 min
May 9, 10:13 PM CDTSevere Thunderstorm WarningBROBrooks, Kenedy52 min
May 9, 10:40 PM CDTTornado WarningBROCameron, Willacy35 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.