Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 45, NWS Brownsville, TX

July 29, 2003Brooks County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Jul 29, 2003, 5:50 PM CDT for Brooks County, Texas. It was in force for 55 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
Jul 29, 2003, 5:50 PM CDT (22:50 UTC)
Expired
Jul 29, 2003, 6:45 PM CDT
In force
55 min
Issued by
NWS Brownsville, TX
Area
Counties, with a storm outline in the text

County Brooks County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.8 hours before the alert went out and 120 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 12:00Z on 2003-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3017 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 12:00Z on 2003-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
3017 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
604 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
-4 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.

241 
WUUS54 KBRO 292250
SVRBRO
TXC047-292345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
549 PM CDT TUE JUL 29 2003

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL BROOKS COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 645 PM CDT

* AT 543 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM LOCATED 7 MILES NORTHWEST OF   ENCINO...OR   
  17 MILES SOUTH OF FALFURRIAS...AND MOVING NORTH AT 12 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   FALFURRIAS BY 640 PM CDT.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 2686 9839 2687 9807 2732 9812 2731 9840

$$

PHILO

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 29, 3:00 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jul 29, 3:00 PM CDT, 2 hours 50 minutes before
DEEP SOUTH TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
300 PM CDT TUE JUL 29 2003

A DRY SOUTHWESTERLY PUNCH AT 6000 FEET HAS INVADED DEEP SOUTH TEXAS
AND CAPPED OFF ANY THUNDERSTORM DEVELOPMENT THROUGH EARLY
AFTERNOON.  THIS CAP WAS STRONG ENOUGH TO COMPLETELY INHIBIT SEA
BREEZE CONVECTION...EVEN THOUGH THE BRO 12Z SOUNDING SHOWED NO SIGN
OF DRYING ALOFT AND A PRECIPITABLE WATER VALUE OF 2.11 INCHES.  GOES
SOUNDER DPI TOTAL PRECIPITABLE WATER INFORMATION SHOWS THE INVADING
DRY AIR PUSHING UP FROM THE SOUTHWEST VERY NICELY.  THE SOUTHWEST
FLOW WAS NOT EVEN PARTICULARLY STRONG AT BRO...ABOUT 10 KNOTS...BUT
IT WAS OBVIOUSLY ENOUGH TO INHIBIT A REPEAT PERFORMANCE OF
YESTERDAY.  ANOTHER FACET TO THE LACK OF SHOWER DEVELOPMENT THIS
AFTERNOON IS EVIDENT IN THE 500 MB VORTICITY FIELDS WHICH SHOW MOST
OF THE ENERGY CIRCLING AROUND OUTSIDE THE BRO COUNTY WARNING AREA.
NOT SURE THIS IS NOT A TEMPORARY SCENARIO...AND FORECAST WILL
REFLECT LOW POPS FOR THE NEXT 36 HOURS IN CASE THE LOW TO MID WINDS
BACK TO THE SOUTH OR SOUTHEAST AGAIN...AS THEY ARE WONT (AND
FORECAST) TO DO.

.MARINE...AT 1 PM BUOY 020 REPORTED SOUTH WINDS AT 4 KNOTS WITH
GUSTS TO 6 KNOTS AND SEAS AT 2 FEET 5 SECONDS.  THE COMBINED EFFECTS
OF A HIGH PRESSURE SYSTEM LOCATED OVER THE GULF OF MEXICO AND A LOW
PRESSURE AREA LOCATED OVER BAJA CALIFORNIA WILL MAINTAIN LIGHT TO
MODERATE SOUTH TO SOUTHEAST WINDS ACROSS THE MARINE AREAS OF DEEP
SOUTH TEXAS THROUGH THE WEEK.  ISOLATED SHOWERS MAY DEVELOP OVER THE
MARINE AREAS FRIDAY AND SATURDAY.

.AVIATION...VFR CONDITIONS ARE OCCURRING OVER THE REGIONAL AIRPORTS
THIS AFTERNOON.  VFR CONDITIONS ARE EXPECTED ACROSS THE CWA THE NEXT
24 HOURS. EXPECT LIGHT TO MODERATE SOUTH TO SOUTHEAST WINDS THE NEXT
FEW DAYS.

.PRELIMINARY POINT TEMPS/POPS...
BROWNSVILLE        BB 076/095 078/095 078 20/20/20/10/05
HARLINGEN          BB 075/096 076/096 075 20/20/20/10/05
MCALLEN            BB 075/096 075/096 075 20/20/20/10/05
RIO GRANDE CITY    BB 074/098 074/098 074 20/20/20/10/05
SOUTH PADRE ISLAND BB 080/090 080/090 080 20/20/20/10/05

.BRO...NONE

SYNOPTIC...69
AVIATION/MARINE...59
MESO...MARTINEZ

THIS PRODUCT IS ALSO AVAILABLE ON OUR INTERNET WEB PAGE AT:
HTTP://WWW.SRH.NOAA.GOV/BRO
Hazardous weather outlook, Jul 29, 2:00 PM CDT, 3 hours 50 minutes before
TXZ248>257-301100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BROWNSVILLE TX
200 PM CDT TUE JUL 29 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR DEEP SOUTH TEXAS.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT.

SPOTTER ACTIVATION IS NOT EXPECTED TODAY AND TONIGHT.

MARTIN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 5:51 PM CDTFlash Flood WarningBROBrooks3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003

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.