Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 97, NWS Brownsville, TX

November 4, 2012Cameron County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Nov 4, 2012, 12:19 PM CST for Cameron County, Texas. It was in force for 26 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
Nov 4, 2012, 12:19 PM CST (18:19 UTC)
Expired
Nov 4, 2012, 12:45 PM CST
In force
26 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 15 km from the middle of the area, began a volume at 18:22 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 12:00Z, 6.3 hours before the alert went out and 15 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 12:00Z on 2012-11-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2174 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 12:00Z on 2012-11-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
2174 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
657 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
58 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.9

Open this sounding in Storm Lab

The text

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

972 
WUUS54 KBRO 041819
SVRBRO
TXC061-041845-
/O.NEW.KBRO.SV.W.0097.121104T1819Z-121104T1845Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1219 PM CST SUN NOV 4 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CAMERON COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 1245 PM CST

* AT 1219 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING 60 MPH WINDS...
  8 MILES SOUTHWEST OF PORT ISABEL.  THE STORM WAS NEARLY STATIONARY.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  PORT ISABEL.
  REID HOPE KING.
  HIGHWAY 48.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND GUSTS TO 60 MPH OR MORE WILL CAUSE SOME STRUCTURAL DAMAGE...
MAINLY TO TREES AND POWER LINES. POORLY ANCHORED ROOFS...MOBILE
HOMES...AND SHEDS ARE ALSO AT RISK.

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 2595 9719 2595 9727 2593 9728 2591 9733
      2592 9735 2591 9736 2589 9736 2591 9744
      2599 9742 2605 9734 2608 9721 2604 9719
      2602 9721 2600 9721 2601 9718 2599 9717
TIME...MOT...LOC 1819Z 084DEG 2KT 2598 9730

$$

JGG
2 follow-up statements
623 
WWUS54 KBRO 041830
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1230 PM CST SUN NOV 4 2012

TXC061-041845-
/O.CON.KBRO.SV.W.0097.000000T0000Z-121104T1845Z/
CAMERON-
1230 PM CST SUN NOV 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 PM CST
FOR SOUTHEASTERN CAMERON COUNTY...

AT 1229 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED 
TO DETECT A SEVERE THUNDERSTORM 8 MILES SOUTHWEST OF PORT ISABEL. 
THIS STORM WAS MOVING SLOWLY SOUTHWEST AT ABOUT 5 MPH. THE STRONGEST 
PART OF THE STORM IS NOW JUST NORTHEAST OF THE PORT OF BROWNSVILLE.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  REID HOPE KING.
  HIGHWAY 48.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  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 2599 9741 2604 9731 2604 9728 2602 9723
      2597 9722 2595 9727 2593 9728 2591 9733
      2592 9735 2591 9736 2589 9736 2591 9744
TIME...MOT...LOC 1829Z 084DEG 2KT 2598 9731

$$

JGG
173 
WWUS54 KBRO 041845
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1245 PM CST SUN NOV 4 2012

TXC061-041854-
/O.EXP.KBRO.SV.W.0097.000000T0000Z-121104T1845Z/
CAMERON-
1245 PM CST SUN NOV 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CAMERON COUNTY
WILL EXPIRE AT 1245 PM CST...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND IS NO LONGER 
SEVERE. GUSTY WINDS TO 45 MPH REMAIN POSSIBLE IN EASTERN BROWNSVILLE 
WITH THIS STORM.

LAT...LON 2599 9741 2604 9731 2604 9728 2602 9723
      2597 9722 2595 9727 2593 9728 2591 9733
      2592 9735 2591 9736 2589 9736 2591 9744
TIME...MOT...LOC 1844Z 084DEG 2KT 2598 9732

$$

JGG

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 4, 1:46 AM CDTSpecial Marine WarningBRO59 min
Nov 4, 9:01 AM CSTSpecial Marine WarningBRO59 min
Nov 4, 12:11 PM CSTSpecial Marine WarningBRO42 min
Nov 4, 12:58 PM CSTSevere Thunderstorm WarningBROCameron22 min
Nov 4, 1:31 PM CSTSpecial Marine WarningBRO44 min
Nov 4, 4:08 PM CSTAreal Flood AdvisoryBROBrooks, Jim Hogg82 min
Nov 4, 4:36 PM CSTFlash Flood WarningBROBrooks, Jim Hogg72 min
Nov 4, 5:01 PM CSTAreal Flood AdvisoryBROHidalgo, Starr59 min
Nov 4, 5:18 PM CSTAreal Flood AdvisoryBROBrooks, Jim Hogg57 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.