Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 242, NWS Austin/San Antonio, TX

October 9, 20024 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 9, 2002, 4:57 AM CDT for 4 counties in Texas. It was in force for 2 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
Oct 9, 2002, 4:57 AM CDT (09:57 UTC)
Expired
Oct 9, 2002, 7:00 AM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

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

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 10.0 hours before the alert went out and 204 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 2002-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1970 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 2002-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
1970 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
957 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.7
Supercell composite
5.8

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 090957
FFWSAT
TXC055-177-187-493-091200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
454 AM CDT WED OCT 9 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  CALDWELL
  GUADALUPE
  GONZALES
  WILSON

* UNTIL 700 AM CDT

* AT 455 AM...WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN   
MOVING EASTWARD FROM GUADALUPE AND WILSON COUNTIES INTO GONZALES AND 
CALDWELL COUNTIES.  ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES 
IS POSSIBLE OVER THE NEXT COUPLE HOURS.  HEAVY RAINS HAVE PUSH 
GERONIMO CREEK IN GUADALUPE COUNTY IS OUT OF ITS BANKS.  

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.


LAT...LON 2963 9818 2947 9807 2905 9816 2936 9763
          2950 9728 2988 9756
1 follow-up statement
000 
WGUS74 KEWX 091159
FFSSAT
TXC055-177-187-493-091300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
700 AM CDT WED OCT 9 2002

...THE FLASH FLOOD WARNING FOR CALDWELL...GUADALUPE...GONZALES AND
WILSON COUNTIES HAS BEEN CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THE RAINFALL WAS ENDING
ACROSS THE WARNED AREA...AND THE FLOOD THREAT WAS DIMINISHING. SOME
MINOR FLOODING MAY CONTINUE...BUT THE THREAT OF SERIOUS FLOODING HAS 
ENDED...AND THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

A FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THE AFTERNOON.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 8, 8:00 PM CDTFlash Flood WarningEWXGuadalupe4 hr
Oct 8, 8:47 PM CDTFlash Flood WarningEWXAtascosa, Wilson3 hr
Oct 8, 9:22 PM CDTSevere Thunderstorm WarningEWXAtascosa, Wilson53 min
Oct 8, 9:32 PM CDTFlash Flood WarningEWXCaldwell4 hr
Oct 8, 10:32 PM CDTFlash Flood WarningEWXBexar3 hr
Oct 8, 10:59 PM CDTFlash Flood WarningEWXKinney, Val Verde3 hr
Oct 8, 11:51 PM CDTFlash Flood WarningEWXGuadalupe114 min
Oct 9, 1:02 AM CDTFlash Flood WarningEWXBandera, Bexar, Kinney, Maverick, Medina, Real and 1 more4 hr
Oct 9, 1:27 AM CDTFlash Flood WarningEWXBastrop, Caldwell, Fayette, Gonzales, Guadalupe, Wilson4 hr
Oct 9, 3:17 AM CDTFlash Flood WarningEWXAtascosa3 hr
Oct 9, 10:16 AM CDTFlash Flood WarningEWXFrio, Zavala3 hr

Nearby

Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002

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.