Alert archive / Texas / Flash Flood Warnings in 2004

Flash Flood Warning 423, NWS Austin/San Antonio, TX

November 23, 2004DeWitt County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Nov 23, 2004, 7:45 PM CST for DeWitt 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 23, 2004, 7:45 PM CST (01:45 UTC)
Expired
Nov 23, 2004, 10:45 PM CST
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County DeWitt County, TX

The radar

The Austin/San Antonio radar (KEWX), 93 km from the middle of the area, began a volume at 01:48 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, 1.8 hours before the alert went out and 146 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 2004-11-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3323 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2004-11-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.1939587897117Sfc1 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
3323 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
1.9
Supercell composite
7.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 240149
FFWEWX
TXC123-240445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
745 PM CST TUE NOV 23 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 1045 PM CST

* AT 742 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOOD PRODUCING RAINS FROM A LARGE THUNDERSTORM COMPLEX 
MOVING INTO WESTERN DEWITT COUNTY. THE THUNDERSTORMS WERE MOVING 
EAST AT 35 MPH...HOWEVER WITH SATURATED SOIL CONDITIONS...VERY HEAVY 
RAINS WILL GIVE RAPID RUNOFF AND RESULTANT FLASH FLOODING. 

* LOCATIONS IN THE WARNING INCLUDE YORKTOWN...WESTHOFF...HOCHHEIM AND
  CUERO.

HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...
COUNTRY ROADS...AND FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

LAT...LON 2884 9762 2912 9703 2936 9723 2902 9773

$$
1 follow-up statement
000 
WGUS74 KEWX 240201
FFSEWX
TXC123-240445-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
759 PM CST TUE NOV 23 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 1045 PM CST FOR DEWITT
COUNTY...

AT 757 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM COMPLEX PRODUCING VERY HEAVY RAIN OVER 
WESTERN DEWITT MOVING EAST AT 35 MPH. SATURATED SOIL CONDITIONS OVER 
THE COUNTY WILL AID IN RAPID RUNOFF AND RESULTANT FLASH FLOODING. 

LOCATIONS IN THE WARNING INCLUDE WESTHOFF...HOCHHEIM AND CUERO.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND. DO NOT STAY IN FLOOD PRONE AREAS.

LAT...LON 2884 9762 2912 9703 2936 9723 2902 9773

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 23, 6:05 PM CSTTornado WarningEWXAtascosa55 min
Nov 23, 6:07 PM CSTTornado WarningEWXWilliamson53 min
Nov 23, 6:10 PM CSTTornado WarningEWXFrio65 min
Nov 23, 6:12 PM CSTFlash Flood WarningEWXBurnet, Williamson3 hr
Nov 23, 6:40 PM CSTTornado WarningEWXWilson65 min
Nov 23, 6:55 PM CSTTornado WarningEWXAtascosa65 min
Nov 23, 7:08 PM CSTTornado WarningEWXKarnes67 min
Nov 23, 7:13 PM CSTFlash Flood WarningEWXKarnes3 hr
Nov 23, 7:33 PM CSTTornado WarningEWXDeWitt57 min
Nov 23, 8:01 PM CSTSevere Thunderstorm WarningEWXFayette, Lee59 min
Nov 23, 8:28 PM CSTSevere Thunderstorm WarningEWXLavaca47 min

Nearby

Flash Flood Warnings in Texas, 2004Every flash flood warning in 2004

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.