Alert archive / Texas / Flash Flood Warnings in 2004

Flash Flood Warning 251, NWS Austin/San Antonio, TX

July 29, 20045 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 29, 2004, 8:52 PM CDT for 5 counties in Texas. It was in force for 4 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
Jul 29, 2004, 8:52 PM CDT (01:52 UTC)
Expired
Jul 30, 2004, 1:00 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Atascosa County, TX, Fayette County, TX, Gonzales County, TX, Karnes County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 53 km from the middle of the area, began a volume at 01:52 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, 1.9 hours before the alert went out and 177 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 2004-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2393 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 2004-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 52 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
2393 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1156 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
52 m²/s²
0-3 km storm-relative helicity
70 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.

000 
WGUS54 KEWX 300159
FFWSAT
TXC013-149-177-255-493-300600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
852 PM CDT THU JUL 29 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  FAYETTE
  GONZALES
  WILSON
  ATASCOSA
  KARNES

* UNTIL 100 AM CDT

* AT 847 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  NUMEROUS STRONG THUNDERSTORMS PRODUCING FLASH FLOODING RAINS OF
  ONE TO TWO INCHES ACROSS THE EFFECTED COUNTIES. LITTLE TO NO
  MOVEMENT IS INDICATED. 

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS...STREAMS...HIGHWAYS AND UNDERPASSES. 

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE 
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED 
QUICKLY. 


LAT...LON 2871 9878 2871 9836 2884 9810 2874 9788
          2884 9765 2902 9781 2946 9728 2966 9721
          2967 9690 2998 9666 3013 9678 2975 9731
          2960 9763 2934 9782 2942 9817 2908 9842
          2918 9876

$$
1 follow-up statement
000 
WGUS74 KEWX 300546
FFSSAT
TXC013-123-149-177-255-493-300600-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1245 AM CDT FRI JUL 30 2004

...A FLASH FLOOD WARNING EXPIRES AT 1 AM CDT FOR ATASCOSA, KARNES,
DEWITT, GONZALES, FAYETTE AND WILSON COUNTIES...

AT 1240 AM CDT...SCATTERED LIGHT SHOWERS REMAINED OVER DEWITT,
GONZALES AND FAYETTE COUNTIES.  THIS ACTIVITY WAS MOVING NORTHEAST
AT 15 MPH.  SINCE THE HEAVIER RAINS HAVE EXITED THE COUNTIES, THE
FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE AT 1 AM. WATERS WILL BE
RECEDING AT LOW LYING AREAS AND LOW WATER CROSSINGS.

A FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 4 AM CDT.

LAT...LON 2940 10102 2927 10076 2943 10071 3015 10072
          2988 10106

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 29, 10:18 PM CDTFlash Flood WarningEWXDeWitt3 hr
Jul 30, 6:06 AM CDTFlash Flood WarningEWXMedina3 hr
Jul 30, 6:19 AM CDTFlash Flood WarningEWXUvalde3 hr
Jul 30, 6:55 AM CDTFlash Flood WarningEWXBandera3 hr
Jul 30, 8:59 AM CDTFlash Flood WarningEWXMedina61 min
Jul 30, 9:11 AM CDTFlash Flood WarningEWXUvalde64 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.