Alert archive / Texas / Flash Flood Warnings in 2004

Flash Flood Warning 71, NWS Austin/San Antonio, TX

April 24, 2004Gonzales County, Guadalupe County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 24, 2004, 2:46 AM CDT for Gonzales County, Guadalupe 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
Apr 24, 2004, 2:46 AM CDT (07:46 UTC)
Expired
Apr 24, 2004, 5:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Gonzales County, TX, Guadalupe County, TX

The radar

The Austin/San Antonio radar (KEWX), 29 km from the middle of the area, began a volume at 07:46 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, 7.8 hours before the alert went out and 207 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 2004-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2567 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 2004-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
2567 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
663 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 240747
FFWSAT
TXC177-187-241045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
246 AM CDT SAT APR 24 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GONZALES COUNTY IN SOUTH CENTRAL TEXAS
  THIS INCLUDES THE CITY OF GONZALES
  GUADALUPE COUNTY IN SOUTH CENTRAL TEXAS
  THIS INCLUDES THE CITY OF SEGUIN

* UNTIL 545 AM CDT

* AT 242 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SHOWERS AND THUNDERSTORM NEAR GERONIMO...OR ABOUT 7 MILES NORTH OF 
  SEGUIN...MOVING NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ZORN...SMILEY...PALMETO...MCQUEENEY...MARION AND KINGSBURY.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 2964 9822 2944 9805 2944 9777 2923 9762
          2944 9730 2973 9731 2961 9764 2978 9795

$$

MSL
1 follow-up statement
000 
WGUS74 KEWX 240923
FFSSAT
TXC177-187-241045-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
425 AM CDT SAT APR 24 2004

...THE FLASH FLOOD WARNING FOR GONZALES AND GUADALUPE COUNTIES IS
CANCELLED...

AT 420 AM CDT...DOPPLER RADAR INDICATED THAT THE HEAVY RAIN HAS 
MOVED EAST OF GONZALES AND GUADALUPE COUNTIES AND ONLY LIGHT RAIN 
CONTINUES. PONDING OF WATER ON ROADS WILL CONTINUE FOR THE NEXT 
SEVERAL HOURS.

LAT...LON 2964 9822 2944 9805 2944 9777 2923 9762
          2944 9730 2973 9731 2961 9764 2978 9795

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 9:38 PM CDTTornado WarningEWXMaverick37 min
Apr 24, 12:50 AM CDTSevere Thunderstorm WarningEWXMedina25 min
Apr 24, 12:54 AM CDTSevere Thunderstorm WarningEWXBexar51 min
Apr 24, 1:10 AM CDTFlash Flood WarningEWXAtascosa, Bexar3 hr
Apr 24, 1:15 AM CDTSevere Thunderstorm WarningEWXAtascosa45 min
Apr 24, 1:30 AM CDTSevere Thunderstorm WarningEWXKendall45 min
Apr 24, 1:42 AM CDTSevere Thunderstorm WarningEWXWilson48 min
Apr 24, 2:08 AM CDTFlash Flood WarningEWXBlanco, Gillespie3 hr
Apr 24, 2:10 AM CDTSevere Thunderstorm WarningEWXComal, Guadalupe50 min
Apr 24, 2:15 AM CDTFlash Flood WarningEWXComal3 hr
Apr 24, 3:42 AM CDTSevere Thunderstorm WarningEWXLavaca63 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.