Alert archive / Texas / Flash Flood Warnings in 1991

Flash Flood Warning 41, NWS Austin/San Antonio, TX

September 23, 1991Uvalde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 23, 1991, 11:30 AM CDT for Uvalde County, Texas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Sep 23, 1991, 11:30 AM CDT (16:30 UTC)
Expired
Sep 23, 1991, 1:30 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Uvalde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 4.5 hours before the alert went out and 104 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 1991-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 334 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 1991-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
334 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
44 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 KSAT 231631
FFWSAT
TXC463-231830-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1130 AM CDT MON SEP 23 1991
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  130 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...UVALDE
 
AT 1130 AM CDT...OVER FIVE INCHES OF RAIN WERE REPORTED IN THE CITY OF
CONCAN IN NORTH UVALDE COUNTY. SEVERAL RIVER CROSSINGS ALONG THE FRIO
RIVER AND ROADS IN AND AROUND THE CONCAN AREA ARE REPORTED CLOSED DUE
TO FLOODING. THE SHOWERS AND THUNDERSTORMS ALONG A SLOW MOVING COLD
FRONT ARE EXPECTED TO CONTINUE FOR ANOTHER TWO HOURS.
 
A FLASH FLOOD WARNING MEANS THAT FL=OODING IS IMMINENT OR HAS BEEN
REPORTED.
 
REMEMBER...DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS OR FROM CHILDREN
PLAYING NEAR FLOODED STREAMS OR DRAINAGE AREAS.

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, Sep 23, 6:42 AM CDT, 4 hours 48 minutes before
TXZ034>036-231400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
640 AM CDT MON SEP 23 1991

...THUNDERSTORMS WITH HEAVY RAINS OVER BURNET COUNTY...

AT 635 AM...THUNDERSTORMS...SOME WITH HEAVY RAINS WERE FROM LAKE TRAVIS
TO MARBLE FALLS NORTHWARD TO BERTRAM AND BURNET.  THE HEAVY RAIN AREAS
WERE FOUND JUST WEST OF LEANDER AND JUST NORTH OF BERTRAM.

MOVEMENT OF THE RAIN WAS VERY SLOWLY TORWARD THE EAST...WHILE THE AREA
WAS BUILDING TO THE SOUTHWEST.

THIS RAIN AREA HAS BEEN OVER BURNET COUNTY FOR THE PAST TWO HOURS AND
HEAVY RAINS HAS BEEN REPORTED OVER THE CITY OF BURNET BY THE SHERIFFS
OFFICE AND KHLB RADIO STATION.

PERSONS SHOULD NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS.  CAMPERS
NEAR STREAMS AND RIVERS SHOULD MONITOR WATER LEVELS.
Special weather statement, Sep 23, 7:46 AM CDT, 3 hours 44 minutes before
TXZ039-040-231500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
745 AM CDT MON SEP 23 1991

...SHOWERS AND THUNDERSTORMS OVER THE TEXAS HILL COUNTRY...

AT 745 AM CDT...RADAR INDICATED SCATTERED SHOWERS AND THUNDERSTORMS
OVER PARTS OF KERR...BANDERA AND KENDALL COUNTY...MOVING EAST AT
10 MILES AN HOUR.

PERIODS OF HEAVY RAIN...GUSTY WINDS AND OCCASIONAL LIGHTNING CAN BE
EXPECTED FROM THESE SHOWERS AND THUNDERSTORMS FOR THE N=EXT FEW HOURS.
Special weather statement, Sep 23, 9:25 AM CDT, 2 hours 5 minutes before
TXZ035-038>041-231525-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
925 AM CDT MON SEP 23 1991

...SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTH CENTRAL
   TEXAS AND THE TEXAS HILL COUNTRY...

AT 920 AM CDT...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED FROM NEAR
THE AUSTIN AREA...SOUTHWEST TO BANDERA AND HELOTES...TO NEAR UVALDE AND
EXTENDING ACROSS EAST MAVERICK COUNTY.  ANOTHER STRONG THUNDERSTORM WAS
JUST NORTH OF GONZALES.  MOVEMENT OF THE STORMS WAS TO THE EAST AT LESS
THAN 10 MPH.

PERIODS OF HEAVY RAIN...GUSTY WINDS AND OCCASIONAL LIGHTNING CAN BE
EXPECTED FROM THESE SHOWERS AND THUNDERSTORMS FOR THE NEXT FEW HOURS.
DUE TO THE SLOW MOVEMENT OF THE STORMS...LOCALLY HEAVY AMOUNTS OF RAIN
IN EXCESS OF TWO INCHES ARE POSSIBLE.  EARLIER THIS MORNING...A STORM
PRODUCED OVER FIVE INCHES OF RAIN IN THE CITY OF BURNET WHICH IS NORTH
OF AUSTIN.

FLOODING OF LOW-LYING AREAS AND LOW-WATER CROSSINGS IS POSSIBLE AND
MOTORISTS SHOULD NOT ATTEMPT TO DRIVE ACROSS FLOODED ROADS.  PERSONS
NEAR THE BANKS OF STREAMS AND CREEKS SHOULD BE ALERT TO HEAVY RAINS AND
RISING WATER.

A SLOW MOVING COLD FRONT STRETCHING FROM AUSTIN TO NEAR DEL RIO...ALONG
WITH DEEP TROPICAL MOISTURE WAS PRODUCING THE RAINS THIS MORNING.  THE
FRONT IS EXPECTED TO SAG SLOWLY SOUTH TODAY BEFORE BECOMING STATIONARY
ACROSS SOUTH CENTRAL TEXAS.

STAY TUNED TO NOAA WEATHER RADIO...OR LOCAL RADIO OR TV FOR LATER
WEATHER UPDATESi.
Special weather statement, Sep 23, 11:21 AM CDT, 9 minutes before
TXZ035-038>041-231730-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1120 AM CDT MON SEP 23 1991

...LOCALLY HEAVY RAINS ACROSS PORTIONS OF SOUTH CENTRAL TEXAS...

AT 1115 AM CDT...SCATTERED SHOWERS AND THUNDERSTORMS STRETCHED ACROSS
SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY...FROM NEAR SAN MARCOS TO
BOERNE TO GARNER STATE PARK...AND FROM BETWEEN BRACKETTVILLE AND UVALDE
TO NORTH OF EAGLE PASS.  MOVEMENT OF THE STORMS WAS SLOWLY TO THE EAST.

THE THUNDERSTORMS WERE DEVELOPING ALONG A SLOW MOVING COLD FRONT THAT
WAS LOCATED FROM JUST SOUTH OF AUSTIN TO NEAR DEL RIO.  LOCALLY HEAVY
AMOUNTS OF RAINFALL ARE LIKELY AS THE STORMS ARE MOVING SLOWLY.  UTOPIA
IN NORTHEAST UVALDE COUNTY REPORTED OVER AN INCH OF RAIN ALREADY AND
OTHER LOCATIONS COULD RECEIVE AMOUNTS IN EXCESS OF TWO INCHES DURING THE
NEXT COUPLE OF HOURS.

FLOODING OF LOW-LYING AREAS AND LOW-WATER CROSSINGS IS POSSIBLE AND
MOTORISTS ARE REMINDED NOT TO ATTEMPT TO DRIVE ACROSS FLOODED ROADS.
ALSO PRONE TO FLOODING ARE LOW AREAS NEAR STREAMS AND CREEKS WHICH CAN
FLOOD QUICKLY UNDER HEAVY AND PERSISTENT RAINS.  PERSONS IN THESE AREAS
SHOULD REMAIN ESPECIALLY ALERT TO HEAVY RAINS AND POSSIBLE RISING
WATERS.

OTHER SHOWERS AND THUNDERSTORMS WERE FURTHER EAST FROM NEAR GONZALES TO
EAST OF KENEDY TO NEAR BEEVILLE.  THESE SHOWERS WERE ASSOCIATED WITH AN
AREA OF LOW PRESSURE THAT WAS MOVING SLOWING ONSHORE OVER THE MIDDLE AND
LOWER TEXAS COAST.

STAY TUNED TO NOAA WEATHER RADIO...OR LOCAL RADIO OR TV FOR LATER
WEATHER UPDATES.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 23, 7:39 AM CDTFlash Flood WarningEWXBurnet3 hr
Sep 23, 12:47 PM CDTFlash Flood WarningEWXComal, Guadalupe118 min
Sep 23, 2:48 PM CDTFlash Flood WarningEWXComal, Guadalupe117 min
Sep 23, 3:25 PM CDTFlash Flood WarningEWXDeWitt3 hr

Nearby

Flash Flood Warnings in Texas, 1991Every flash flood warning in 1991

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.