Alert archive / Texas / Flash Flood Warnings in 1993

Flash Flood Warning 28, NWS Austin/San Antonio, TX

August 31, 1993Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 31, 1993, 12:00 PM CDT for Val Verde County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 31, 1993, 12:00 PM CDT (17:00 UTC)
Expired
Aug 31, 1993, 3:00 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Val Verde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 5.0 hours before the alert went out and 66 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 1993-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1097 joules per kilogram.LCLLFCEL10008507005003002001001 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, Del Rio, TX at 12:00Z on 1993-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
1097 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
725 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
43 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 
TTAA00 KDRT 311659
FFWDRT
TXC465-312000-

BULLETIN - EBS ACTIVITATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DEL RIO TX
1200 PM CDT TUE AUG 31 1993

THE NATIONAL WEATHER SERVICE HAS EXTENDED THE FLASH FLOOD WARNING
ISSUED EARLIER...AND IT IS NOW EFFECTIVE UNTIL 300 PM CDT FOR PEOPLE
IN THE FOLOWING COUNTY IN

SOUTHCENTRAL TEXAS...VAL VERDE.

AT 1155 AM CDT...FLOODING WAS CONTINUING IN SEVERAL AREAS IN VAL VERDE
COUNTY. MOST OF THIS FLOODING WAS THE RESULT OF HEAVIER RAINFALL THAT
HAD FALLEN IN VAL VERDE COUNTY THIS MORNING. ALTHOUGH MOST OF THE
HEAVIER RAINFALL HAD ENDED...A WIDESPREAD AREA OF SHOWERS AND A FEW
THUNDERSTORMS REMAINED OVER MUCH OF VAL VERDE COUNTY. LITTLE MOVEMENT
WAS INDICATED BY RADAR.

SINCE THE GROUND IS ALREADY SATURATED FROM PRIOR RAINS...ANY ADDITIONAL
RAINFALL WILL NOT SOAK IN BUT RUN OFF RAPIDLY INTO ALREADY FLOODED
CREEKS AND RIVERS...GREATLY ADDING TO THE THREAT OF FLASH FLOODING.

MANY LOW WATER CROSSINGS REMAIN FLOODED ALONG ROADWAYS IN VAL VERDE
COUNTY. ALTHOUGH WATER LEVELS IN SOME OF THESE LOW WATER CROSSINGS
HAVE BEEN SLOWLY RECEEDING...MOST ARE NOT YET SAFE TO CROSS. YOU
SHOULD NEVER ATTEMPT TO CROSS WATER OF AN UNKNOWN DEPTH. TWO FEET
OF RUSHING WATER DURING A FLASH FLOOD CAN SWEEP AWAY MOST
AUTOMOBILES AND SEND THEIR OCCUPANTS TO THEIR DEATH.

A FLASH FLOOD WATCH ALSO REMAINS IN EFFECT FOR VAL VERDE COUNTY
TODAY...AND A FLOOD WARNING HAS BEEN POSTED FOR THE DEVILS AND
DRY DEVILS RIVER. YOUR NATIONAL WEATHER SERVICE WILL CONTINUE TO
MONITOR THIS FLOOD SITUATION. STAY TUNED TO NOAA WEATHER RADIO OR
LOCAL RADIO AND TELEVISION STATIONS FOR FURTHER INFORMATION.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 31, 6:25 AM CDT, 5 hours 35 minutes before
TXZ034-035-054-311500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
625 AM CDT TUE AUG 31 1993

AT 620 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN HONDO...TEXAS SHOWED
AN AREA OF SHOWERS AND THUNDERSTORMS FROM NORTH OF DEL RIO TO NORTH OF
ROCKSPRINGS MOVING SLOWLY SOUTH.

THESE SHOWERS AND THUNDERSTORMS WILL AFFECT PARTS OF EDWARDS COUNTY FOR
THE NEXT FEW HOURS.  LOCALLY HEAVY RAIN AND STRONG GUSTY WIND IS POSSIBLE
WITH THE STRONGER STORMS.  MOTORISTS SHOULD NOT ATTEMPT TO DRIVE
INTO ANY LOW WATER CROSSINGS THAT CAN POTENTIALLY BECOME FLOODED.
Special weather statement, Aug 31, 6:25 AM CDT, 5 hours 35 minutes before
TXZ034-035-054-311500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
625 AM CDT TUE AUG 31 1993

AT 620 AM CDT THE NATIONAL WEATHER SERVICE RADAR IN HONDO...TEXAS SHOWED
AN AREA OF SHOWERS AND THUNDERSTORMS FROM NORTH OF DEL RIO TO NORTH OF
ROCKSPRINGS MOVING SLOWLY SOUTH.

THESE SHOWERS AND THUNDERSTORMS WILL AFFECT PARTS OF EDWARDS COUNTY FOR
THE NEXT FEW HOURS.  LOCALLY HEAVY RAIN AND STRONG GUSTY WIND IS POSSIBLE
WITH THE STRONGER STORMS.  MOTORISTS SHOULD NOT ATTEMPT TO DRIVE
INTO ANY LOW WATER CROSSINGS THAT CAN POTENTIALLY BECOME FLOODED.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 31, 6:32 AM CDTFlash Flood WarningEWXVal Verde118 min
Aug 31, 8:30 AM CDTFlash Flood WarningEWXVal Verde

Nearby

Flash Flood Warnings in Texas, 1993Every flash flood warning in 1993

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.