Alert archive / Texas / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 7, NWS Brownsville, TX

August 13, 1996Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Aug 13, 1996, 7:18 PM CDT for Zapata County, Texas. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 13, 1996, 7:18 PM CDT (00:18 UTC)
Expired
Aug 13, 1996, 8:15 PM CDT
In force
57 min
Issued by
NWS Brownsville, TX
Area
Whole counties

County Zapata County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 0.3 hours before the alert went out and 198 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 1996-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2117 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 1996-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 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
2117 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1292 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KBRO 140017
SVRBRO
TXC505-140115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
718 PM CDT TUE AUG 13 1996
 
THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN SOUTH TEXAS
 
   ...ZAPATA COUNTY
 
AT 715 PM RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 10 MILES EAST OF
SAN YGNACIO IN ZAPATA COUNTY MOVING SLOWLY SOUTHWEST. A STORM IN THE
AREA EARLIER CAUSED WINDS STRONG ENOUGH TO CAUSE A TRACTOR TRAILER TRUCK
TO LEAVE THE ROAD.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
 
 
&

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 Aug 13, 2:25 PM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Aug 13, 2:25 PM CDT, 4 hours 53 minutes before
DEEP SOUTH TEXAS WEATHER FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
223 PM CDT TUE AUG 13 1996

USUAL SUMMER WX TO RESIDE OVR DP S TX NEXT FEW DAYS WITH WX MOST
AFFECTED BY STRONG RIDGE NR 4 CRNRS RGN.  WK SFC BNDRY OVER C TX
SLOWLY PUSHING SOUTHWARD...BUT DO NOT THINK IT WILL GET FAR ENUF
TO HAVE ANY EFFECT ON DP S TX WX OTHER THAN ADD A FEW MORE CLDS.
MODELS IN GOOD AGREEMENT WITH RETURN TO HOT AND DRY WX WITH ETA
PW VALUES HOLDING IN THE 1.5 TO 1.7 RANGE THRU 48 HRS. SEABREEZE
QUIET ATTM AND CONDS NOT REAL FAVORABLE FOR ACTIVITY.  MAY STILL
POP A FEW RWS/TRWS ALNG IT NEXT COUPLE OF AFTNS...BUT WL NOT ADD
POPS TO PACKAGE ATTM AS THEY ARE QUITE LOW.  XTNDED NO DIFFERENT
WITH TROPICS QUITE QUIET.

BRO  78/96/78/96    00/05/00/05
MFE  77/99/78/100   00/05/00/05
RGC  77/104/77/104  00/00/00/00
SPI  80/89/79/89    00/00/00/00

54

In the hours before

Special weather statement, Aug 13, 6:13 PM CDT, 1 hour 5 minutes before
TXZ248-140020-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
613 PM CDT TUE AUG 13 1996

AT 615 PM RADAR INDICATED THUNDERSTORMS NEAR SAN YGNACIO IN ZAPATA
COUNTY CAPABLE OF CAUSING STRONG WIND. THE STORMS WERE MOVING SLOWLY
SOUTHWEST. KEEP CLOSE TABS OF THEM. IF SEVERE WEATHER OCCURS, PLEASE
ASK THE NEAREST LAW ENFORCEMENT AGENCY TO CALL THE NATIONAL WEATHER
SERVICE IN BROWNSVILLE.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 8:26 PM CDTFlash Flood WarningBROStarr, Zapata64 min
Aug 13, 8:26 PM CDTSevere Thunderstorm WarningBROStarr, Zapata64 min
Aug 13, 9:39 PM CDTFlash Flood WarningBROZapata6 hr

Nearby

Severe Thunderstorm Warnings in Texas, 1996Every severe thunderstorm warning in 1996

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.