Alert archive / Texas / Flash Flood Warnings in 2004

Flash Flood Warning 273, NWS Austin/San Antonio, TX

August 23, 2004Frio County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 23, 2004, 7:20 AM CDT for Frio 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
Aug 23, 2004, 7:20 AM CDT (12:20 UTC)
Expired
Aug 23, 2004, 10:15 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Frio County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 0.3 hours before the alert went out and 171 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, Del Rio, TX at 12:00Z on 2004-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 963 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, Del Rio, TX at 12:00Z on 2004-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 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
963 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
145 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 231223
FFWSAT
TXC163-231515-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
720 AM CDT MON AUG 23 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 1015 AM CDT

* AT 709 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADARS ARE        
  INDICATING HEAVY RAINS OVER SOUTHWEST FRIO COUNTY...OR NEAR DIVOT. 
  THE STORM PRODUCING FLASH FLOODING WAS NEARLY STATIONARY.

* OTHER LOCATIONS IN THE WARNING INCLUDE PEARSALL AND FRIO TOWN.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

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 2905 9938 2864 9939 2867 9883 2902 9886

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 22, 8:50 PM CDTFlash Flood WarningEWXBexar, Medina115 min
Aug 22, 9:15 PM CDTSevere Thunderstorm WarningEWXBexar, Medina60 min
Aug 22, 11:04 PM CDTFlash Flood WarningEWXFrio3 hr
Aug 22, 11:40 PM CDTFlash Flood WarningEWXMedina3 hr
Aug 23, 12:12 AM CDTFlash Flood WarningEWXBandera3 hr
Aug 23, 1:31 AM CDTFlash Flood WarningEWXKendall3 hr
Aug 23, 1:42 AM CDTFlash Flood WarningEWXFrio, Medina4 hr
Aug 23, 5:37 AM CDTFlash Flood WarningEWXFrio113 min
Aug 23, 8:27 AM CDTFlash Flood WarningEWXDimmit4 hr
Aug 23, 10:11 AM CDTFlash Flood WarningEWXFrio4 hr

Nearby

Flash Flood Warnings in Texas, 2004Every flash flood warning in 2004

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.