Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 255, NWS Austin/San Antonio, TX

October 24, 2002Bexar County, Comal County, Guadalupe County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 24, 2002, 1:52 PM CDT for Bexar County, Comal County, Guadalupe County, 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 24, 2002, 1:52 PM CDT (18:52 UTC)
Expired
Oct 24, 2002, 4:00 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Bexar County, TX, Comal County, TX, Guadalupe County, TX

The radar

The Austin/San Antonio radar (KEWX), 31 km from the middle of the area, began a volume at 18:54 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, 6.9 hours before the alert went out and 224 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 2002-10-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1063 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 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 12:00Z on 2002-10-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 125 square meters per square second.19395878Sfc1 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
1063 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
575 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
125 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.9

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 241852
FFWSAT
TXC029-091-187-242100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
147 PM CDT THU OCT 24 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  COMAL
  GUADALUPE
  BEXAR

* UNTIL 400 PM CDT

* AT 147 PM...WEATHER SERVICE DOPPLER RADAR INDICATED RAIN WAS
  ENDING ACROSS BEXAR...COMAL AND GUADALUPE COUNTIES WHILE MOVING
  EAST AT 20 MPH.

HOWEVER...THE SALADO...OLMOS...LEON...GERONIMO AND ALLIGATOR CREEKS 
WILL CONTINUE TO RUN HIGH FOR THE NEXT FEW HOURS AND APPROACH FLOOD 
CONDITIONS.  AS A RESULT THE FLOOD WARNING HAS BEEN EXTENDED.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND. 

LAT...LON 2966 9875 2929 9879 2915 9840 2947 9816
          2943 9787 2965 9769 2975 9801 3000 9828

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 24, 4:09 AM CDTFlash Flood WarningEWXEdwards, Kinney, Maverick, Real, Uvalde4 hr
Oct 24, 5:44 AM CDTFlash Flood WarningEWXZavala2 hr
Oct 24, 5:52 AM CDTFlash Flood WarningEWXBexar, Medina4 hr
Oct 24, 7:44 AM CDTFlash Flood WarningEWXEdwards, Kinney, Maverick, Real, Uvalde, Val Verde4 hr
Oct 24, 9:23 AM CDTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Comal, Frio, Kendall and 2 more3 hr
Oct 24, 9:53 AM CDTFlash Flood WarningEWXDimmit, Zavala112 min
Oct 24, 11:00 AM CDTFlash Flood WarningEWXCaldwell, Gonzales, Guadalupe, Karnes, Wilson3 hr
Oct 24, 11:28 AM CDTFlash Flood WarningEWXDimmit, Real, Uvalde, Zavala62 min
Oct 24, 12:09 PM CDTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Blanco, Comal, Frio and 5 more111 min
Oct 24, 12:36 PM CDTFlash Flood WarningEWXDeWitt, Lavaca84 min
Oct 24, 1:10 PM CDTFlash Flood WarningEWXBastrop, Fayette, Travis3 hr
Oct 24, 2:00 PM CDTFlash Flood WarningEWXDeWitt, Gonzales, Karnes, Lavaca, Wilson2 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; radar from the NEXRAD Level II archive.