Alert archive / Texas / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 11, NWS Brownsville, TX

September 19, 1996Jim Hogg County, Zapata County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Sep 19, 1996, 3:29 AM CDT for Jim Hogg County, Zapata County, Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 19, 1996, 3:29 AM CDT (08:29 UTC)
Expired
Sep 19, 1996, 5:30 AM CDT
In force
2 hr
Issued by
NWS Brownsville, TX
Area
Whole counties

Counties Jim Hogg County, TX, Zapata County, TX

The radar

The Corpus Christi radar (KCRP), 164 km from the middle of the area, began a volume at 08:30 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

Corpus Christi, TX (KCRP), launched 00:00Z, 8.5 hours before the alert went out and 176 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 1996-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2537 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 1996-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 27 square meters per square second.193958Sfc1 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
2537 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
860 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
27 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Sep 19, 2:43 AM CDT, 46 minutes earlier.

Area forecast discussion, Sep 19, 2:43 AM CDT, 46 minutes before
DEEP SOUTH TEXAS WEATHER FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
240 AM CDT THU SEP 19 1996

ETA ONLY MODEL WITH HANDLE ON SITUATION AS IT IS PANNING OUT NOW.
IT CONTS TO ACCUMULATE 3/4 INCH OF RAIN THRU 48 HRS WHILE NGM PRECIP
IS NEGLIGIBLE AND ITS FWC POPS ONLY NR 10 PCT. LOTS OF ACTVTY ON 88D
SCOPE CURRENTLY...AN INDCTN OF VORT MAX BEING EFFECTIVE WX PRODUCER.
STG STORMS IN WRN VALLEY DUMPED 8+ INCHES OF RAIN IN ZAPATA COUNTY
WITH 4 INCHES OF THAT DURG EVE AND ANOTHER 4 INCHES IN PAST HOUR...
OVR ERN ZAPATA S OF HIWAY 16...MSTLY UNPOPULATED AREA. WILL CNSDR A
FLASH FLOOD WRNG DUE TO THIS RADAR RAIN ESTIMATE. SATL LOOP CONTS TO
SHOW CNVCTN FIRING FROM MEXICO UP TO E TX ALONG THIS ELONGATED POS
VORT AREA. POPS SHUD BE RAISED TO AT LEAST 40 PCT TDA ACRS DEEP S TX.
MUCH OF VORT MAX TO MOVE E OF HERE ON FRI SO POPS CAN BE LOWERED TO
20 PCT THEN. WILL LOWER MAX TEMPS A SHADE FROM FWC WHILE MINS WILL
STAY ABOVE FWC VALUES EXCPT IN RAIN-COOLED AREAS. FNT STILL NOT EXPCTD
TO RCH VALLEY...LKLY WILL WASH OUT IN S CNTRL TX AS SFC HI OVR ROCKIES
WEAKENS AND UPR TROF NOT HAVING ENUF SWD EXTENTION TO GIVE SUPPORT
FOR FROPA.                    57

SUGGESTED NUMBERS:

BRO EB  091/078 092/078 092  40/20/20/10
MFE EB  093/078 095/078 095  40/20/20/10
RGC EB  095/078 097/078 097  40/20/20/10
SPI EB  088/080 089/080 089  40/20/20/10

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 19, 3:00 AM CDTFlash Flood WarningBROJim Hogg, Zapata6 hr
Sep 19, 5:09 AM CDTFlash Flood WarningBROJim Hogg, Starr, Zapata4 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; radar from the NEXRAD Level II archive.