Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 340, NWS Austin/San Antonio, TX

July 15, 2007Caldwell County, Gonzales County, Guadalupe County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 15, 2007, 1:00 AM CDT for Caldwell County, Gonzales County, Guadalupe County, Texas. It was in force for 3 hr. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 15, 2007, 1:00 AM CDT (06:00 UTC)
Expired
Jul 15, 2007, 4:00 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Caldwell County, TX, Gonzales County, TX, Guadalupe County, TX

The radar

The Austin/San Antonio radar (KEWX), 34 km from the middle of the area, began a volume at 06:00 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.

What was reported inside it

TimeReportWhereRemark
Jul 15, 1:55 AM CDTHEAVY RAIN 0.884 E New Braunfels, TX1 HOUR RAINFALL TOTAL AT NWS OFFICE
Jul 15, 1:55 AM CDTHEAVY RAIN 1.317 Wnw Seguin, TXONE HOUR RAINFALL TOTAL FROM GBRA GAUGE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 6.0 hours before the alert went out and 213 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 2007-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2097 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 2007-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
2097 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
1072 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 150600
FFWEWX
TXC055-091-177-187-150900-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
100 AM CDT SUN JUL 15 2007

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CALDWELL COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITY OF LULING...
  COMAL COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITY OF NEW BRAUNFELS...
  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 400 AM CDT

* AT 1248 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
  RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING FROM
  THUNDERSTORMS ALONG A LINE EXTENDING FROM 12 MILES NORTHEAST OF
  LULING TO SMITHSON VALLEY...OR ALONG A LINE EXTENDING FROM 11 MILES
  SOUTHEAST OF LOCKHART TO NEW BRAUNFELS...MOVING SOUTH AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  ZORN...FENTRESS...GARDEN RIDGE...GERONIMO...KINGSBURY...WAELDER...
  CIBOLO...MARION...MCQUEENEY...PALMETO AND NEW BERLIN

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

IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.

REPORT FLASH FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY FOR RELAY
TO THE NATIONAL WEATHER SERVICE.

LAT...LON 2947 9726 2941 9802 2941 9811 2945 9814
      2949 9813 2949 9817 2966 9832 2984 9825
      2985 9805 2976 9800 2986 9790 2987 9753
      2987 9743 2966 9718

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 1:00 AM CDTFlash Flood WarningEWXCaldwell, Comal, Gonzales, Guadalupe3 hr
Jul 15, 1:31 AM CDTFlash Flood WarningEWXFayette, Lee3 hr
Jul 15, 2:13 AM CDTFlash Flood WarningEWXBexar3 hr
Jul 15, 3:21 AM CDTFlash Flood WarningEWXLavaca3 hr
Jul 15, 3:41 AM CDTFlash Flood WarningEWXGonzales2 hr
Jul 15, 3:52 AM CDTFlash Flood WarningEWXDeWitt113 min
Jul 15, 4:14 AM CDTFlash Flood WarningEWXMedina2 hr
Jul 15, 5:38 AM CDTFlash Flood WarningEWXGonzales67 min
Jul 15, 5:44 AM CDTFlash Flood WarningEWXDeWitt2 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.