Flash Flooding in Texas, September 27, 2004

Name: Flash Flooding in Texas, September 27, 2004
Start: 2004-09-27T15:00
End: 2004-09-27T20:30
Location: Texas

September 27, 2004 · NWS EWX · 4 events in 4 counties and zones

4 flash flood, as filed by the National Weather Service.

Where it happened

Every event with a place to put it; 4 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 4

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before the first event at Sep 27, 1:10 PM CST, 1 hour 50 minutes earlier.

Area forecast discussion, Sep 27, 1:10 PM CST, 1 hour 50 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
210 PM CDT MON SEP 27 2004

.DISCUSSION...
FOR TONIGHT...WILL EXTEND THE FLOOD WATCH THROUGH MIDNIGHT FOR VAL
VERDE AND EDWARDS COUNTIES.  THE BOUDARY LAYER FOCUS IS PROGGED TO
SHIFT WEST ACROSS THE RIO GRADNE BY MIDNIGHT AND THE LOWER LEVEL
MOISTURE DECREASED DUE TO CONTINUOUS NORTHEAST WINDS.  WILL EXPECT
GENERAL LIGHT TO MODERATE SHOWERS IN THE WATCH AREA TONIGHT
RESULTING IN LOCALLIZED 1 TO 2 INCH TOTALS BUT GENERALLY AROUND ONE
QUARTER INCH.  FOR THE REST OF THE COUNTY WARNING AREA,  THE
TROPICAL PLUME DISCONNECTS FROM THE BOUNDAYR LAYER MOISTURE AS THE
UPPER LEVEL LOW LIFTS EAST AND THE FLOW BECOMES MORE ZONAL.  AT THE
SURFACE, THE MASSIVE HIGH PRESSURE OVER MOST OF THE U.S. WILL BUILD
SLIGHTLY INTO TEXAS, KEEPING THE DRIER DEWPOINTS COMING IN AND
LIMITING CLOUDINESS TO MID AND HIGH CLOUDS. ANOTHER COLD FRONT WILL
SLIDE INTO TEXAS SATURDAY, REINFORCING THE NORTHERLY SFC FLOW, BUT
THERE WILL BE A LOW CLOUD DECK TO ANNOUNCE THE ARRIVAL.

&&

.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY              65  86  62  86 / 20  10  10  5
AUSTIN BERGSTROM INTL AIRPORT  61  86  59  86 / 20  10  10  5
DEL RIO INTL AIRPORT           67  84  63  84 / 40  40  20  5
SAN ANTONIO INTL AIRPORT       64  86  63  85 / 20  20  10  5

&&

.EWX WATCHES/WARNINGS/ADVISORIES...FLOOD WATCH FOR FLASH FLOODING
THROUGH
MIDNIGHT - EDWARDS, KINNEY AND VAL VERDE COUNTIES.

&&

06/02/DC

Hazardous weather outlook, Sep 26, 4:10 PM CST, 22 hours 50 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
510 PM CDT SUN SEP 26 2004

TXZ171>173-183>194-202>209-217>225-228-271100-
ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DEWITT-
DIMMIT-EDWARDS-FAYETTE-FRIO-GILLESPIE-GONZALES-GUADALUPE-HAYS-KARNES-
KENDALL-KERR-KINNEY-LAVACA-LEE-LLANO-MAVERICK-MEDINA-REAL-TRAVIS-
UVALDE-VAL VERDE-WILLIAMSON-WILSON-ZAVALA-
510 PM CDT SUN SEP 26 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.
A FLOOD WATCH FOR FLASH FLOODING IS IN EFFECT UNTIL 7 AM CDT
MONDAY FOR VAL VERDE...EDWARDS...KINNEY AND MAVERICK COUNTIES.  A
SLOW MOVING UPPER LEVEL STORM SYSTEM OVER THE SOUTHWEST STATES IS
GENERATING SHOWERS AND THUNDERSTORMS. THE WET WEATHER IS LIKELY TO
CONTINUE THROUGH TONIGHT PRODUCING A THREAT OF FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
ADDITIONAL SHOWERS AND THUNDERSTORMS MONDAY MAY DICTATE EXTENSION
OF THE FLOOD WATCH FOR FLASH FLOODING FOR THE WESTERN-MOST
COUNTIES OF SOUTH CENTRAL TEXAS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

4 flash flood. Local standard time, as filed.

Flash Flood, Edwards

When: September 27, 3:00 PM CST to 4:30 PM CST
Where: Edwards County, Southwest Portion
Reported by: LAW ENFORCEMENT
Coordinates: 29.983, -100.305 (the zone’s center; the record gives no point)

Thunderstorms reformed during the early afternoon of the 27th, re-developing flash flooding over the western half of the county very quickly. They continue to spread slowly southeastward, producing between 1 and 2 inches of rain south and east of Carta Valley to the Kinney County line. Once again, portions of US377 and FM2523 were reported to be briefly under water in the late afternoon.

Flash Flood, Kinney

When: September 27, 5:00 PM CST to 7:00 PM CST
Where: Kinney County, Countywide
Reported by: LAW ENFORCEMENT
Coordinates: 29.350, -100.418 (the zone’s center; the record gives no point)

The thunderstorms spread into Kinney County during the late afternoon, with rainfall totals over the county averaging between 1 and 2 inches. Highest amounts were near 4 inches along FM674 from where it crosses the Edwards County border to just north of Brackettville. FM674 and FM334 were reported under water in the early evening.

Flash Flood, Uvalde

When: September 27, 6:30 PM CST to 8:30 PM CST
Where: Uvalde County, West Portion
Reported by: LAW ENFORCEMENT
Coordinates: 29.357, -99.762 (the zone’s center; the record gives no point)

The thunderstorms continued to spread eastward from Kinney County into western Uvalde County, with rain totals between 1 and 2 inches over the area. Highest totals were near 4 inches just northwest of Concan. Brief flash flooding closed portions of SH55 in the northwest part of the county and several roads north of Concan.

Flash Flood, Val Verde

When: September 27, 7:00 PM CST to 8:30 PM CST
Where: Val Verde County, Comstock
Reported by: LAW ENFORCEMENT
Coordinates: 29.893, -101.152 (the zone’s center; the record gives no point)

Very slow-moving thunderstorms formed in the Comstock area in the late afternoon and produced between 2 and 3 inches of rain around the town. The Sheriff's Department reported portions of FM1024 and SH163 briefly closed in the Comstock area.

What these are

Flash Flood: Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in Texas in 2004 Every state in 2004 This day in weather history Warnings in Texas, September 2004

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5424970, 5424971, 5424972, 5424973.