Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 74, NWS Austin/San Antonio, TX

September 3, 2003Atascosa County, Karnes County, Wilson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 3, 2003, 11:54 AM CDT for Atascosa County, Karnes County, Wilson 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
Sep 3, 2003, 11:54 AM CDT (16:54 UTC)
Expired
Sep 3, 2003, 2:45 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Atascosa County, TX, Karnes County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 88 km from the middle of the area, began a volume at 16:54 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, 4.9 hours before the alert went out and 156 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 2003-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2682 joules per kilogram.LCLEL10008507005003002001001 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 2003-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 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
2682 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
614 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
-15 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 031654
FFWSAT
TXC013-255-493-031945-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1154 AM CDT WED SEP 3 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 245 PM CDT

* AT 1154 AM...WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS 
  THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL ACROSS WARNED AREA.
  THESE THUNDERSTORMS WERE MOVING SLOWLY NORTHEAST AT 5 TO 10 MPH.
  ISOLATED LOCALLY HEAVY RAINFALL TOTALS OF 2 TO 3 INCHES ARE BEING
  INDICATED BY DOPPLER RADAR...AND AN ADDITIONAL 1 TO 2 INCHES OF
  RAINFALL IS POSSIBLE OVER THE WARNED AREA.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER 
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. DO NOT DRIVE YOUR 
VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. 
 

LAT...LON 2885 9877 2865 9878 2866 9831 2881 9810
          2872 9804 2880 9758 2900 9780 2912 9766
          2937 9788 2934 9814

$$
1 follow-up statement
000 
WGUS74 KEWX 031856
FFSSAT
TXC013-255-493-031945-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
156 PM CDT WED SEP 3 2003

...A FLASH FLOOD WARNING CONTINUES FOR WILSON...ATASCOSA AND KARNES
COUNTIES UNTIL 245 PM CDT...

AT 156 PM...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS SLOWLY 
DECREASING ACROSS THE WARNED AREA. THE HEAVIEST RAINFALL CONTINUES 
TO PRODUCE FLASH FLOODING RAINS OF 2 TO 4 INCHES OVER I-37 AROUND 
CAMPBELLTON. TRAVEL IN SOUTHEAST ATASCOSA COUNTY IS DISCOURAGED AS 
ROADWAYS IN AND AROUND CAMPBELLTON ARE LIKELY FLOODED. 
OTHERWISE...EXPECT A REDUCED THREAT OF FLASH FLOODING BY 3 PM.

THE CHANCE OF RAIN WILL CONTINUE INTO THE EVENING HOURS. IF 
ADDITIONAL RAINS MOVE INTO ATASCOSA...KARNES...AND WILSON COUNTIES A 
NEW FLASH FLOOD WARNING MAY BE NEEDED.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND. STAY TUNED TO LOCAL MEDIA OUTLETS FOR THE LATEST
WEATHER INFORMATION.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 3, 12:56 PM CDTFlash Flood WarningEWXBexar3 hr
Sep 3, 1:21 PM CDTFlash Flood WarningEWXDeWitt, Fayette, Lavaca3 hr

Nearby

Flash Flood Warnings in Texas, 2003Every flash flood warning in 2003

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.