Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 264, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Aug 19, 2004, 11:11 PM CDT for Williamson 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
- Aug 19, 2004, 11:11 PM CDT (04:11 UTC)
- Expired
- Aug 20, 2004, 2:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Williamson County, TX
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 4.2 hours before the alert went out and 254 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.
- Mixed-layer CAPE
- 732 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 814 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 125 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 200413
FFWSAT
TXC491-200715-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1111 PM CDT THU AUG 19 2004
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
WILLIAMSON
* UNTIL 215 AM CDT
* AT 1100 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED FLASH FLOODING FROM A THUNDERSTORM ABOUT OVER CEDAR
PARK...MOVING EAST AT 15 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE WEIR...THRALL...TAYLOR...
SERENADA...LIBERTY HILL...HUTTO...GRANGER DAM...GRANGER...
GEORGETOWN DAM...GEORGETOWN...FLORENCE...COUPLAND AND ANDICE.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK SLIDES IN STEEP TERRAIN. 2 TO 4 INCHES OF RAIN HAVE
ALREADY FALLEN ACROSS MOST OF WILLIAMSON COUNTY TONIGHT.
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.
LAT...LON 3042 9732 3041 9734 3049 9750 3048 9754
3051 9759 3050 9764 3059 9792 3064 9795
3088 9785 3073 9727 3056 9721
$$2 follow-up statements
000
WGUS74 KEWX 200447
FFSSAT
TXC491-200715-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1143 PM CDT THU AUG 19 2004
...A FLASH FLOOD WARNING CONTINUES UNTIL 215 AM CDT FOR WILLIAMSON
COUNTY...
AT 1135 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN BETWEEN ROUND ROCK AND LEANDER...MOVING EAST AT
15 MPH. A LARGE AREA OF THE COUNTY...FROM LEANDER TO SERENADA TO
BARTLETT AND GRANGER DAM...HAS RECEIVED 2 TO 4 INCHES OF RAIN OVER
THE PAST 3 HOURS.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEIR...
THRALL...TAYLOR...SERENADA...LIBERTY HILL...JARRELL...GRANGER DAM...
GRANGER...GEORGETOWN DAM...GEORGETOWN...FLORENCE...COUPLAND AND
ANDICE.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN AUSTIN
SAN ANTONIO.
LAT...LON 3042 9732 3041 9734 3049 9750 3048 9754
3051 9759 3050 9764 3059 9792 3064 9795
3088 9785 3073 9727 3056 9721
$$000
WGUS74 KEWX 200609
FFSSAT
TXC491-200715-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
107 AM CDT FRI AUG 20 2004
...A FLASH FLOOD WARNING CONTINUES UNTIL 215 AM CDT FOR WILLIAMSON
COUNTY...
AT 102 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ONLY LIGHT RAIN ACROSS WILLIAMSON COUNTY. SMALL STREAMS MAY CONTINUE
TO RUN HIGH AND IN FLOOD FOR THE NEXT HOUR FROM EARLIER RAINS.
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
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 TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
LAT...LON 3042 9732 3041 9734 3049 9750 3048 9754
3051 9759 3050 9764 3059 9792 3064 9795
3088 9785 3073 9727 3056 9721
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 9:17 PM CDT | Severe Thunderstorm Warning | EWX | Travis, Williamson | 58 min |
| Aug 19, 9:35 PM CDT | Flash Flood Warning | EWX | Williamson | 115 min |
| Aug 19, 10:34 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 56 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.