Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 103, NWS Austin/San Antonio, TX

July 4, 2002Atascosa County, Frio County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 4, 2002, 2:18 PM CDT for Atascosa County, Frio County, Texas. It was in force for 102 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 4, 2002, 2:18 PM CDT (19:18 UTC)
Expired
Jul 4, 2002, 4:00 PM CDT
In force
102 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Atascosa County, TX, Frio County, TX

The radar

The Austin/San Antonio radar (KEWX), 118 km from the middle of the area, began a volume at 19:17 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, 7.3 hours before the alert went out and 197 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 2002-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1669 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2002-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1669 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 041918
FFWSAT
TXC013-163-042100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
218 PM CDT THU JUL 4 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 400 PM CDT

* AT 213 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
CLUSTER OF SHOWERS AND THUNDERSTORMS WITH MODERATE TO HEAVY RAINFALL 
SOUTH OF A DIVOT TO PEARSALL TO CAMPBELLTON LINE EXTENDING SOUTH TO 
COTULLA AND TILDEN...MOVING NORTH AT 20 MPH.

RAINFALL RATES OF UP TO 2 INCHES PER HOUR WILL CAUSE STREAMS AND 
RIVERS TO RISE AGAIN CREATING ADDITIONAL FLASH FLOODING.  

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.  CAMPERS SHOULD EVACUATE TO HIGHER GROUND.  

 LAT...LON 2867 9938 2866 9836 2883 9816 2909 9845 2924 9879 2906
           9877 2908 9939

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 7:06 PM CDTFlash Flood WarningEWXBexar3 hr
Jul 3, 7:32 PM CDTFlash Flood WarningEWXAtascosa118 min
Jul 3, 8:11 PM CDTFlash Flood WarningEWXKendall3 hr
Jul 3, 9:03 PM CDTFlash Flood WarningEWXFrio3 hr
Jul 3, 9:25 PM CDTFlash Flood WarningEWXComal110 min
Jul 3, 9:59 PM CDTFlash Flood WarningEWXAtascosa2 hr
Jul 3, 10:17 PM CDTFlash Flood WarningEWXBexar3 hr
Jul 3, 11:06 PM CDTFlash Flood WarningEWXBlanco, Gillespie, Kendall3 hr
Jul 3, 11:42 PM CDTFlash Flood WarningEWXAtascosa, Frio, Medina, Uvalde3 hr
Jul 4, 12:28 AM CDTFlash Flood WarningEWXBexar, Comal, Gillespie, Kendall4 hr
Jul 4, 2:11 AM CDTFlash Flood WarningEWXBlanco4 hr
Jul 4, 2:40 AM CDTFlash Flood WarningEWXMedina, Uvalde2 hr
Jul 4, 2:50 AM CDTFlash Flood WarningEWXReal2 hr
Jul 4, 2:51 AM CDTFlash Flood WarningEWXLlano2 hr
Jul 4, 3:04 AM CDTFlash Flood WarningEWXBurnet116 min
Jul 4, 4:50 AM CDTFlash Flood WarningEWXBandera, Gillespie, Kendall, Kerr, Llano, Medina and 2 more7 hr
Jul 4, 6:51 AM CDTFlash Flood WarningEWXBlanco5 hr
Jul 4, 7:32 AM CDTFlash Flood WarningEWXBurnet4 hr
Jul 4, 7:52 AM CDTFlash Flood WarningEWXBexar4 hr
Jul 4, 9:29 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jul 4, 11:40 AM CDTFlash Flood WarningEWXBandera, Bexar, Blanco, Burnet, Comal, Gillespie and 4 more4 hr
Jul 4, 3:53 PM CDTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Blanco, Burnet, Comal and 8 more4 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.