Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 91, NWS Brownsville, TX

September 8, 2012Hidalgo County, Starr County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Sep 8, 2012, 7:29 PM CDT for Hidalgo County, Starr County, Texas. It was in force for 31 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
Sep 8, 2012, 7:29 PM CDT (00:29 UTC)
Expired
Sep 8, 2012, 8:00 PM CDT
In force
31 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon

Counties Hidalgo County, TX, Starr County, TX

The radar

The Brownsville radar (KBRO), 134 km from the middle of the area, began a volume at 00:31 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, 0.5 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-pSkew-T log-p diagram, Brownsville Intl, TX at 00:00Z on 2012-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 408 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 2012-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 square meters per square second.1939Sfc1 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
408 J/kg
Mixed-layer CIN
-167 J/kg
Mixed-layer LCL
1626 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

893 
WUUS54 KBRO 090029
SVRBRO
TXC215-427-090100-
/O.NEW.KBRO.SV.W.0091.120909T0029Z-120909T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
729 PM CDT SAT SEP 8 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS.
  NORTHEASTERN STARR COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 800 PM CDT

* AT 729 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING DESTRUCTIVE 70 MPH   
WINDS...OVER NORTHEASTERN STARR COUNTY OR NEAR DELMITA...MOVING 
SOUTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SANTA CATARINA.
  DELMITA
  HIGHWAYS 2294...755...AND 1017.

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 2666 9829 2654 9834 2654 9849 2658 9861
      2663 9875 2674 9861 2677 9854 2674 9846
      2671 9837
TIME...MOT...LOC 0029Z 052DEG 25KT 2669 9857

$$

JGG
2 follow-up statements
174 
WWUS54 KBRO 090044
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
744 PM CDT SAT SEP 8 2012

TXC215-427-090100-
/O.CON.KBRO.SV.W.0091.000000T0000Z-120909T0100Z/
HIDALGO-STARR-
744 PM CDT SAT SEP 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHEASTERN STARR AND NORTHWESTERN HIDALGO COUNTIES...

AT 743 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT A LARGE SEVERE THUNDERSTORM 14 MILES NORTHWEST OF 
MCCOOK...MOVING SOUTHWEST AT 20 MPH. THIS STORM IS CAPABLE OF 
DAMAGING WINDS TO 60 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  SANTA CATARINA.
  DELMITA.
  PUERTO RICO.
  LA GLORIA.

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 2666 9829 2654 9834 2654 9849 2658 9861
      2663 9875 2674 9861 2677 9854 2674 9846
      2671 9837
TIME...MOT...LOC 0043Z 032DEG 26KT 2661 9855

$$

JGG
923 
WWUS54 KBRO 090058
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
758 PM CDT SAT SEP 8 2012

TXC215-427-090107-
/O.EXP.KBRO.SV.W.0091.000000T0000Z-120909T0100Z/
HIDALGO-STARR-
758 PM CDT SAT SEP 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN STARR AND
NORTHWESTERN HIDALGO COUNTIES WILL EXPIRE AT 800 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED TO BELOW SEVERE 
LIMITS...THEREFORE THE WARNING FOR THIS AREA WILL BE ALLOWED TO 
EXPIRE. ADDITIONAL STRONG STORMS AND SEVERE WEATHER WILL BE POSSIBLE 
ACROSS PORTIONS OF HIDALGO AND STARR COUNTIES THROUGH THIS EVENING.


LAT...LON 2666 9829 2654 9834 2654 9849 2658 9861
      2663 9875 2674 9861 2677 9854 2674 9846
      2671 9837
TIME...MOT...LOC 0057Z 032DEG 26KT 2652 9860

$$

JGG

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 7:27 PM CDTAreal Flood AdvisoryBROBrooks, Jim Hogg, Starr68 min
Sep 8, 8:06 PM CDTAreal Flood AdvisoryBROHidalgo, Starr67 min
Sep 9, 3:51 AM CDTSpecial Marine WarningBRO90 min
Sep 9, 4:57 AM CDTSmall Craft AdvisoryBRO5 hr

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.