Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 98, NWS Austin/San Antonio, TX

November 17, 2003DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Nov 17, 2003, 8:35 AM CST for DeWitt County, Lavaca County, Texas. It was in force for 3 hr. 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 17, 2003, 8:35 AM CST (14:35 UTC)
Expired
Nov 17, 2003, 11:30 AM CST
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties DeWitt County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 98 km from the middle of the area, began a volume at 14:38 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 12:00Z, 2.6 hours before the alert went out and 161 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 2003-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1818 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, Corpus Christi, TX at 12:00Z on 2003-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 150 square meters per square second.1939587897Sfc1 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
1818 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
573 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
150 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
1.4
Supercell composite
8.4

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 171436
FFWSAT
TXC123-285-171730-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
835 AM CST MON NOV 17 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS EXTENDED THE

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  LAVACA
  DEWITT

* UNTIL 1130 AM CST

* AT 828 AM...WEATHER SERVICE DOPPLER RADAR INDICATED PERSISTENT 
VERY HEAVY RAIN OVER DEWITT AND LAVACA COUNTIES.  WEATHER SERVICE 
DOPPLER RADARS HAVE ESTIMATED 3 TO 5 INCHES OF RAIN HAS FALLEN FROM 
CUERO WEST TO UPPER MEYERSVILLE.  A BAND OF HEAVY RAIN STRETCHES 
FROM UPPER MEYERSVILLE EAST THROUGH CUERO TO SOUTH OF HALLETTSVILLE. 
ADDITIONAL RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE EXPECTED.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.

LAT...LON 2891 9734 2893 9743 2887 9750 2891 9765
          2943 9716 2962 9700 2962 9684 2940 9665

$$
2 follow-up statements
000 
WGUS74 KEWX 171547
FFSSAT
TXC123-285-171715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
945 AM CST MON NOV 17 2003

...FLASH FLOOD WARNING CONTINUES FOR LAVACA AND DEWITT COUNTIES 
UNTIL 1130 AM CST...

NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE 
WIDESPREAD SHOWERS AND THUNDERSTORMS PRODUCING HEAVY RAINFALL FROM 
YORKTOWN TO CUERO TO SPEAKS.  ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 
INCHES CAN EXPECTED ON AREAS OVER LAVACA AND DEWITT COUNTIES. SOME 
AREAS HAVE ALREADY RECEIVED AMOUNTS OF 3 TO 5 INCHES EARLIER THIS 
MORNING...AND THE GROUND IS SATURATED.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND. STAY TUNED TO LOCAL MEDIA OUTLETS FOR THE LATEST
WEATHER INFORMATION.

$$
000 
WGUS74 KEWX 171723
FFSSAT
TXC123-285-171815-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1125 AM CST MON NOV 17 2003

...THE FLASH FLOOD WARNING FOR LAVACA AND DEWITT COUNTIES HAS BEEN 
ALLOWED TO EXPIRE...

NATIONAL WEATHER SERVICE RADAR INDICATED THE RAINFALL WAS DECREASING 
AND THE THREAT OFF ADDITIONAL FLOODING HAS DIMINISHED. SOME RESIDUAL 
FLOODING MAY CONTINUE...BUT THE THREAT OF SERIOUS FLOODING HAS ENDED 
AND THE FLASH FLOOD WARNING HAS EXPIRED.  

ADDITIONAL HEAVY RAINS TO THE SOUTH WILL MOVE NORTHEAST OVER THE 
NEXT FEW HOURS AND MAY PROMPT ADDITIONAL FLASH FLOOD WARNINGS FOR 
THE AFTERNOON HOURS.  A FLASH FLOOD WATCH CONTINUES IN EFFECT 
THROUGH TONIGHT. 

$$

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 17, 7:04 AM CSTFlash Flood WarningEWXDeWitt, Lavaca116 min

Nearby

Flash Flood Warnings in Texas, 2003Every flash flood 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; radar from the NEXRAD Level II archive.