Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 263, NWS Austin/San Antonio, TX

July 2, 2007DeWitt County, Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 2, 2007, 6:19 AM CDT for DeWitt County, Lavaca County, Texas. It took effect at Jul 2, 2007, 6:24 AM CDT. 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 counties it named.

The facts

Issued
Jul 2, 2007, 6:19 AM CDT (11:19 UTC)
In effect from
Jul 2, 2007, 6:24 AM CDT
Expired
Jul 2, 2007, 9:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties DeWitt County, TX, Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 100 km from the middle of the area, began a volume at 11:21 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, 11.3 hours before the alert went out and 168 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 2007-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2566 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2007-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
2566 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 021124
FFWEWX
TXC123-285-021445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
619 AM CDT MON JUL 2 2007

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  DEWITT COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...YORKTOWN...CUERO...
  LAVACA COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...YOAKUM...SHINER...MOULTON...
  HALLETTSVILLE...

* UNTIL 945 AM CDT

* AT 615 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
  RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE CONTINUED FLASH 
  FLOODING FROM SHOWERS AND THUNDERSTORM OVER LAVACA AND DEWITT
  COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUBLIME AND
  EZZELL

SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN WILL PRODUCE ADDITIONAL 
RAINFALL AMOUNTS OF ONE TO THREE INCHES OVER THE NEXT COUPLE HOURS 
ADDING TO THE 2 TO 5 INCHES THAT HAS FALLEN OVER MUCH OF SOUTHERN 
LAVACA AND DEWITT COUNTIES.  MANY CREEK AND STREAMS OVER LAVACA AND 
DEWITT COUNTIES WILL SEE SIGNIFICANT RISES AND FLASH FLOODING.  GET 
AWAY FROM ALL RIVERS...CREEKS AND STREAMS AS THEY COULD EXPERIENCE 
ADDITIONAL RISES. 

DO NOT DRIVE WHERE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER 
CAN CARRY AWAY MOST VEHICLES...INCLUDING SUVS AND PICKUPS. TURN 
AROUND DONT DROWN.

LAT...LON 2902 9768 2887 9758 2896 9740 2891 9731
      2914 9698 2909 9693 2935 9662 2962 9688
      2960 9716 2938 9722

$$
1 follow-up statement
000 
WGUS74 KEWX 021348
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
849 AM CDT MON JUL 2 2007

TXC123-285-021445-
LAVACA TX-DEWITT TX-
849 AM CDT MON JUL 2 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 AM CDT FOR
DEWITT AND LAVACA COUNTIES...

AT 845 AM CDT...LIGHT TO MODERATE SHOWERS CONTINUE ACROSS DEWITT AND
LAVACA COUNTIES HOWEVER RUNOFF CONTINUES AFTER THE EXCESSIVE RAINFALL
OVERNIGHT INTO EARLY THIS MORNING.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO YOAKUM...
SUBLIME...SHINER...MOULTON...HALLETTSVILLE AND EZZELL

WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU   
SAVE MAY BE YOUR OWN.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT DRIVE THROUGH FLOODED
AREAS...ESPECIALLY AT NIGHT. STAY TUNED TO NOAA WEATHER RADIO OR
LOCAL NEWS MEDIA FOR THE LATEST FLOOD INFORMATION.

LAT...LON 2902 9768 2887 9758 2896 9740 2891 9731
      2914 9698 2909 9693 2935 9662 2962 9688
      2960 9716 2938 9722

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 7:02 PM CDTFlash Flood WarningEWXReal3 hr
Jul 2, 2:39 AM CDTFlash Flood WarningEWXDeWitt, Lavaca4 hr
Jul 2, 4:04 AM CDTFlash Flood WatchEWXAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more6 days
Jul 2, 8:37 AM CDTFlash Flood WarningEWXKarnes3 hr
Jul 2, 8:57 AM CDTFlash Flood WarningEWXGonzales3 hr
Jul 2, 9:38 AM CDTFlash Flood WarningEWXDeWitt, Lavaca3 hr
Jul 2, 11:29 AM CDTFlash Flood WarningEWXKarnes3 hr
Jul 2, 12:30 PM CDTFlash Flood WarningEWXFrio3 hr
Jul 2, 5:47 PM CDTFlash Flood WarningEWXBandera, Real3 hr
Jul 2, 5:55 PM CDTFlash Flood WarningEWXKendall3 hr

Nearby

Flash Flood Warnings in Texas, 2007Every flash flood warning in 2007

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.