Alert archive / Texas / Flash Flood Warnings in 1992

Flash Flood Warning 20, NWS Austin/San Antonio, TX

February 24, 1992Dimmit County, Zavala County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Feb 24, 1992, 9:50 AM CST for Dimmit County, Zavala County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Feb 24, 1992, 9:50 AM CST (15:50 UTC)
Expired
Feb 24, 1992, 1:45 PM CST
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Dimmit County, TX, Zavala County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 3.8 hours before the alert went out and 258 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 1992-02-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1285 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, Corpus Christi, TX at 12:00Z on 1992-02-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 185 square meters per square second.193958Sfc1 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
1285 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
545 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
185 m²/s²
0-3 km storm-relative helicity
231 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 241551
FFWSAT
TXC127-507-241945-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
950 AM CST MON FEB 24 1992
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  145 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
 
   ...DIMMIT COUNTY...ZAVALA COUNTY
 
STRONG THUNDERSTORMS WITH VERY HEAVY RAINS HAVE CONTINUED OVER DIMMIT
AND ZAVALA COUNTIES OVER THE PAST COUPLE OF HOURS AND RADAR INDICATED
THAT THESE HEAVY RAINS CONTINUE.
 
AVOID ALREADY FLOODED AREAS.  TRAVELERS SHOULD NOT ATTEMPT TO
CROSS FLOODED ROADS.  IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE
IMMEDIATELY TO HIGHER GROUND.
 
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IMMINENT.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
TO ESCAPE RISING WATER DURING THREATENING RAINS.

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, Feb 24, 4:07 AM CST, 5 hours 43 minutes before
TXZ054-241200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
400 AM CST MON FEB 24 1992

AT 400 PM CST RADAR INDICATED A 50 MILE WIDE AREA OF SHOWERS AND THUNDER
STORMS EXTENDING FROM 75 MILES SOUTHWEST OF DEL RIO NORTHEAST TO SAN
ANGELO. THE STRONGEST THUNDERSTORMS WITH VERY HEAVY RAIN...STRONG GUSTY
WINDS...DANGEROUS LIGHTNING AND POSSIBLE HAIL WERE LOCATED 40 MILES

SOUTH SOUTHWEST AND 40 MILES NORTHWEST OF DEL RIO. MOVEMENT OF
INDIVIDUAL STORMS WAS TO THE NORTHEAST AT 15 MPH WHILE THE WHOLE AREA OF
STORMS WAS TO DRIFTING TO THE SOUTHEAST.

BOATERS ON LAKE AMISTAD AND AREA RIVERS SHOULD BEGIN MAKING
PREPARATIONS TO SEEK SAFE HARBOR IMMEDIATELY. VERY HEAVY RAIN AND
MINOR STREET FLOODING WILL LIKELY OCCUR IN DEL RIO AS THESE
THUNDERSTORMS MOVE INTO THE AREA WITHIN THE NEXT 2 HOURS.
Special weather statement, Feb 24, 4:10 AM CST, 5 hours 40 minutes before
TXZ054-241200-

SPECIAL WEATHER STATEMENT...CORRECTED FOR TIME IN FIRST LINE
NATIONAL WEATHER SERVICE DEL RIO TX
400 AM CST MON FEB 24 1992

AT 400 AM CST RADAR INDICATED A 50 MILE WIDE AREA OF SHOWERS AND THUNDER
STORMS EXTENDING FROM 75 MILES SOUTHWEST OF DEL RIO NORTHEAST TO SAN
ANGELO. THE STRONGEST THUNDERSTORMS WITH VERY HEAVY RAIN...STRONG GUSTY
WINDS...DANGEROUS LIGHTNING AND POSSIBLE HAIL WERE LOCATED 40 MILES

SOUTH SOUTHWEST AND 40 MILES NORTHWEST OF DEL RIO. MOVEMENT OF
INDIVIDUAL STORMS WAS TO THE NORTHEAST AT 15 MPH WHILE THE WHOLE AREA OF
STORMS WAS TO DRIFTING TO THE SOUTHEAST.

BOATERS ON LAKE AMISTAD AND AREA RIVERS SHOULD BEGIN MAKING

PREPARATIONS TO SEEK SAFE HARnBOR IMMEDIATELY. VERY HEAVY RAIN AND
MINOR STREET FLOODING WILL LIKELY OCCUR IN DEL RIO AS THESE
THUNDERSTORMS MOVE INTO THE AREA WITHIN THE NEXT 2 HOURS.
Special weather statement, Feb 24, 4:11 AM CST, 5 hours 39 minutes before
TXZ054-241200-

SPECIAL WEATHER STATEMENT...CORRECTED FOR TIME IN FIRST LINE
NATIONAL WEATHER SERVICE DEL RIO TX
400 AM CST MON FEB 24 1992

AT 400 AM CST RADAR INDICATED A 50 MILE WIDE AREA OF SHOWERS AND THUNDER
STORMS EXTENDING FROM 75 MILES SOUTHWEST OF DEL RIO NORTHEAST TO SAN
ANGELO. THE STRONGEST THUNDERSTORMS WITH VERY HEAVY RAIN...STRONG GUSTY
WINDS...DANGEROUS LIGHTNING AND POSSIBLE HAIL WERE LOCATED 40 MILES

SOUTH SOUTHWEST AND 40 MILES NORTHWEST OF DEL RIO. MOVEMENT OF
INDIVIDUAL STORMS WAS TO THE NORTHEAST AT 15 MPH WHILE THE WHOLE AREA OF
STORMS WAS TO DRIFTING TO THE SOUTHEAST.

BOATERS ON LAKE AMISTAD AND AREA RIVERS SHOULD BEGIN MAKING

PREPARATIONS TO SEEK SAFE HARBOR IMMEDIATELY. VERY HEAVY RAIN AND
MINOR STREET FLOODING WILL LIKELY OCCUR IN DEL RIO AS THESE
THUNDERSTORMS MOVE INTO THE AREA WITHIN THE NEXT 2 HOURS.
Special weather statement, Feb 24, 4:32 AM CST, 5 hours 18 minutes before
TXZ034>035-038>039-041-240600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO, TX
430 AM CST MON FEB 24 1992

...FLOOD AND FLASH FLOOD WATCH IN EFFECT TODAY...

AT 415 AM CST WEATHER RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS
WITH HEAVY RAINFALL OVER VAL VERDE AND EDWARDS COUNTIES AND EXTENDING INTO
MEXICO.  THE STRONGEST STORM WAS IN LOCATED SOUTH OF VAL VERDE COUNTY...
STILL IN MEXICO.  THESE STORMS WERE MOVING TO THE NORTHEAST AT 30 MPH.  NO
PROBLEMS HAVE BEEN REPORTED FROM THESE COUNTIES YET.

PERSON ACROSS SOUTH TEXAS SHOULD REMAIN ALERT FOR CHANGING WEATHER
CONDITION AS THESE AND OTHER STORMS CONTINUE AND MOVE ACROSS THE AREA
TODAY.
MDV
Special weather statement, Feb 24, 6:18 AM CST, 3 hours 32 minutes before
TXZ034>035-038>039-041-240600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO, TX
615 AM CST MON FEB 24 1992

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 1 PM THIS AFTERNOON...
...FLOOD AND FLASH FLOOD WATCH IN EFFECT TODAY...

THE SEVERE THUNDERSTORM WATCH IS 70 STATUTE MILES EITHER SIDE OF A LINE
FROM 15 MILES EAST SOUTHEAST OF LAREDO TO 65 MILES EAST NORTHEAST OF
JUNCTION.  AT 610 AM CST WEATHER RADAR SHOWED AN AREA OF SHOWERS AND
THUNDERSTORMS WITH HEAVY RAINFALL EXTENDING FROM MAVERICK COUNTY TO THE
NORTH TO KERR COUNTY.  THE STRONGEST STORMS WERE IN MAVERICK...EDWARDS AND
KERR COUNTIES.  THESE STORMS WERE MOVING TO THE NORTHEAST AT 30 MPH.

PERSON ACROSS SOUTH TEXAS SHOULD REMAIN ALERT FOR CHANGING WEATHER
CONDITION AS THESE AND OTHER STORMS CONTINUE AND MOVE ACROSS THE AREA
TODAY.
MDV
Special weather statement, Feb 24, 8:42 AM CST, 1 hour 8 minutes before
TXZ034-035-036-037-038-040-054-241545-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
840 AM CST MON FEB 24 1992

...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 100 PM CST FOR THE TEXAS
HILL COUNTRY...EDWARDS PLATEAU AND MUCH OF SOUHT CENTRAL TEXAS...
...FLOOD AND FLASH FLOOD WATCH IN EFFECT TODAY FOR SOUTH TEXAS EXCEPT
THE EXTREME SOUTH...

THE SEVERE THUNDERSTORM WARNING FOR BANDERA COUNTY HAS EXPIRERED.
DIME SIZE HAIL WAS REPORTED IN MEDINA WITH THE PASSAGE OF THE
STORMS...HEAVY RAINS HAVE ALSO BEEN REPORTED.

A LINE OF THUNDERSTORMS EXTENENS FROM KENDALL COUNTY TO JUST NORTH OF
HONDO IN MEDINA THROUGH ZAVALA COUNTY AND INTO DIMMIT COUNTY.  THIS LI
WAS MOVING EAST AT 30 MPH.  A LARGE AREA OF RAIN COVERS MOST OF SOUTH
CENTRAL TEXAS.

PERSON IN SOUTH CENTRAL TEXAS SHOULD LOOK FOR CHANGING WEATHER THIS
MORNING AND INTO THE AFTERNOON HOURS.
MDV

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 24, 6:40 AM CSTSevere Thunderstorm WarningEWXReal50 min
Feb 24, 7:47 AM CSTSevere Thunderstorm WarningEWXBandera43 min
Feb 24, 8:53 AM CSTSevere Thunderstorm WarningEWXBlanco67 min
Feb 24, 9:47 AM CSTFlash Flood WarningEWXHays, Travis58 min
Feb 24, 9:47 AM CSTFlash Flood WarningEWXBurnet58 min
Feb 24, 10:06 AM CSTFlash Flood WarningEWXFrio4 hr
Feb 24, 1:28 PM CSTFlash Flood WarningEWXJackson, Lavaca, Victoria2 hr
Feb 24, 1:28 PM CSTFlash Flood WarningEWXGoliad2 hr
Feb 24, 2:48 PM CSTFlash Flood WarningEWXCalhoun57 min
Feb 24, 4:01 PM CSTFlash Flood WarningEWXFayette3 hr
Feb 24, 4:01 PM CSTFlash Flood WarningEWXBurleson3 hr

Nearby

Flash Flood Warnings in Texas, 1992Every flash flood warning in 1992

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.