Alert archive / Texas / Flash Flood Warnings in 2004

Flash Flood Warning 371, NWS Austin/San Antonio, TX

November 17, 20045 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Nov 17, 2004, 10:28 AM CST for 5 counties in 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, 2004, 10:28 AM CST (16:28 UTC)
Expired
Nov 17, 2004, 1:30 PM CST
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Bastrop County, TX, DeWitt County, TX, Fayette County, TX, Lavaca County, TX, Lee County, TX

The radar

The Austin/San Antonio radar (KEWX), 92 km from the middle of the area, began a volume at 16:29 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, 4.5 hours before the alert went out and 226 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 2004-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 800 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 12:00Z on 2004-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
800 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
182 m²/s²
Significant tornado parameter
0.7
Supercell composite
7.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 171632
FFWEWX
TXC021-123-149-285-287-171930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1028 AM CST WED NOV 17 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  LEE
  BASTROP
  FAYETTE
  LAVACA
  DEWITT

* UNTIL 130 PM CST

* AT 1026 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR 
  INDICATED VERY HEAVY RAIN FROM A SLOW MOVING LINE OF THUNDERSTORMS
  OVER THE WARNED AREA. IN ADDITION TO THE LINE OF THUNDERSTORMS...
  ADDITIONAL REDEVELOPMENT OF SCATTERED THUNDERSTORMS WILL FORM IN 
  THE WAKE OF THIS LINE.


RAINFALL AMOUNTS OF 1 TO 2 INCHES HAVE ALREADY FALLEN ACROSS PARTS 
OF BASTROP AND DEWITT COUNTIES...AND THESE RAIN TOTALS SHOULD 
INCREASE TO AS MUCH AS 3 TO 4 INCHES BEFORE THE SHOWERS AND 
THUNDERSTORMS BEGIN TO DECREASE THIS AFTERNOON. 

FLASH FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED AREAS. A LITTLE
OVER A FOOT OF WATER CAN CARRY AWAY MOST CARS AND TRUCKS. TURN AROUND
DONT DROWN.

LAT...LON 2966 9710 2957 9719 2940 9721 2907 9766
      2895 9731 2918 9703 2913 9693 2940 9663
      2967 9691 2971 9693 3000 9661 3016 9669
      3016 9683 3030 9672 3054 9696 3039 9733
      3024 9745 3007 9762 2980 9728

$$
1 follow-up statement
000 
WGUS74 KEWX 171833
FFSEWX
TXC021-123-149-285-287-171930-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1233 PM CST WED NOV 17 2004

...A FLASH FLOOD WARNING CONTINUES UNTIL 130 PM CST FOR DEWITT...
LAVACA...FAYETTE...BASTROP AND LEE COUNTIES...

AT 1233 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SCATTERED SHOWERS AND THUNDERSTORM PRODUCING VERY HEAVY 
RAINS OVER THE WARNED AREA.  

THESE RAINS ARE SHIFTING EAST INTO SOUTHEAST TEXAS WITH THE CHANCE 
OF RAIN DECREASING OVER THE NEXT HOUR OR TWO. ADDITIONAL RAINFALL 
AMOUNTS OVER THE WARNED AREA WILL LIKELY BE LESS THAN ONE-HALF INCH 
WITH HIGHEST TOTALS EXPECTED TO BE JUST OVER 3 INCHES. LOW WATER 
CROSSINGS WILL LIKELY REMAIN FLOODED IN SPOTS THROUGH AT LEAST 1 PM. 

TRAVEL IS DISCOURAGED ACROSS THE WARNED AREA THROUGH 130 PM...BUT 
CONDITIONS ARE EXPECTED TO IMPROVE LATER THIS AFTERNOON. 

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS 
WATER COVERED AREAS. A LITTLE OVER A FOOT OF WATER CAN CARRY AWAY 
MOST CARS AND TRUCKS. TURN AROUND DONT DROWN.

LAT...LON 2966 9710 2957 9719 2940 9721 2907 9766
      2895 9731 2918 9703 2913 9693 2940 9663
      2967 9691 2971 9693 3000 9661 3016 9669
      3016 9683 3030 9672 3054 9696 3039 9733
      3024 9745 3007 9762 2980 9728

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 16, 6:03 PM CSTTornado WarningEWXAtascosa, Bandera, Bexar, Frio, Kendall, Medina42 min
Nov 16, 6:21 PM CSTTornado WarningEWXGillespie, Llano24 min
Nov 16, 6:22 PM CSTFlash Flood WarningEWXGillespie, Kendall, Kerr, Llano4 hr
Nov 16, 6:46 PM CSTTornado WarningEWXGillespie, Llano44 min
Nov 16, 6:47 PM CSTTornado WarningEWXKendall28 min
Nov 16, 7:13 PM CSTTornado WarningEWXBexar32 min
Nov 16, 7:45 PM CSTTornado WarningEWXBexar15 min
Nov 16, 7:52 PM CSTTornado WarningEWXBlanco38 min
Nov 16, 7:57 PM CSTTornado WarningEWXComal48 min
Nov 16, 8:22 PM CSTFlash Flood WarningEWXBlanco, Comal, Guadalupe3 hr
Nov 16, 8:28 PM CSTTornado WarningEWXBlanco32 min
Nov 16, 8:44 PM CSTTornado WarningEWXComal, Hays31 min
Nov 16, 9:15 PM CSTFlash Flood WarningEWXEdwards, Kerr, Kinney, Real, Uvalde, Val Verde6 hr
Nov 16, 9:59 PM CSTFlash Flood WarningEWXGillespie, Kendall, Llano4 hr
Nov 16, 10:04 PM CSTFlash Flood WarningEWXHays, Travis3 hr
Nov 16, 11:10 PM CSTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Blanco, Comal, Guadalupe and 1 more3 hr
Nov 16, 11:22 PM CSTFlash Flood WarningEWXBurnet, Williamson3 hr
Nov 17, 12:14 AM CSTFlash Flood WarningEWXHays, Travis3 hr
Nov 17, 1:48 AM CSTFlash Flood WarningEWXGillespie, Kendall, Llano117 min
Nov 17, 2:07 AM CSTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Blanco, Burnet, Comal and 3 more6 hr
Nov 17, 3:13 AM CSTFlash Flood WarningEWXEdwards, Kerr, Kinney, Real, Uvalde, Val Verde4 hr
Nov 17, 3:21 AM CSTFlash Flood WarningEWXHays, Travis6 hr
Nov 17, 3:43 AM CSTFlash Flood WarningEWXGillespie, Kendall, Llano5 hr
Nov 17, 6:24 AM CSTFlash Flood WarningEWXWilson3 hr
Nov 17, 7:25 AM CSTFlash Flood WarningEWXAtascosa, Bexar, Blanco, Burnet, Caldwell, Comal and 7 more4 hr
Nov 17, 10:56 AM CSTTornado WarningEWXLavaca49 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.