Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 241, NWS Austin/San Antonio, TX

October 9, 2002Atascosa County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 9, 2002, 3:17 AM CDT for Atascosa 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
Oct 9, 2002, 3:17 AM CDT (08:17 UTC)
Expired
Oct 9, 2002, 6:15 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Atascosa County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 8.3 hours before the alert went out and 190 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 090817
FFWSAT
TXC013-091115-

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 615 AM CDT

* AT 314 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  OVER NORTHERN ATASCOSA COUNTY MOVING EAST AT 20 MPH.

SHOWERS AND THUNDERSTORMS WITH RAINFALL RATES OF ONE TO TWO INCHES 
PER HOURS WILL MOVE ACROSS ATASCOSA COUNTY OVER THE NEXT COUPLE 
HOURS PRODUCING FLASH FLOODING.  

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 2917 9877 2880 9874 2878 9829 2913 9854
1 follow-up statement
000 
WGUS74 KEWX 091015
FFSSAT
TXC013-091215-

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

...THE FLASH FLOOD WARNING FOR ATASCOSA COUNTY HAS BEEN CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THE RAINFALL HAS DECREASED 
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 FOR ATASCOSA 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, 4:57 AM CDTFlash Flood WarningEWXCaldwell, Gonzales, Guadalupe, Wilson2 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.