Alert archive / Texas / Flash Flood Warnings in 1992

Flash Flood Warning 92, NWS Austin/San Antonio, TX

November 19, 1992Atascosa County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Nov 19, 1992, 7:07 PM CST for Atascosa County, Texas. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Nov 19, 1992, 7:07 PM CST (01:07 UTC)
Expired
Nov 20, 1992, 12:15 AM CST
In force
5 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Atascosa County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 1.1 hours before the alert went out and 174 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 00:00Z on 1992-11-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 63 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 00:00Z on 1992-11-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 square meters per square second.19395878Sfc1 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
63 J/kg
Mixed-layer CIN
-101 J/kg
Mixed-layer LCL
794 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
101 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 200107
FFWSAT
TXC013-200615-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
707 PM CST THU NOV 19 1992
 
THE NATIONAL WEATHER SERVICE IN SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1215 AM CST
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
 
   ...ATASCOSA COUNTY
 
AT 710 PM CST A LINE OF HEAVY THUNDERSTORMS IN WESTERN ATASCOSA COUNTY
WAS MOVING TOWARD THE EAST AT 20 MILES PER HOUR. THESE STORMS WILL
PRODUCE HEAVY RAINS ACROSS THE ENTIRE COUNTY FOR THE NEXT 3 TO 4 HOURS
ADDING TO THE FLOODING WHICH OCCURRED EARLIER THIS EVENING. THIS IS A
DANGEROUS FLOODING SITUATION.
 
AVOID ALREADY FLOODED AREAS.  TRAVELERS SHOULD NOT ATTEMPT TO
CROSS FLOODED ROADS.  IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE
IMMEDIATELY TO HIGHER GROUND.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS OBSERVED
ACT QUtICKLY.  MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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, Nov 19, 6:59 PM CST, 8 minutes before
TXZ030-034>037-200150-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
700 PM CST THU 19 NOV 1992

...FLOOD AND FLASH FLOOD WATCH IN EFFECT THROUGH TONIGHT...

...HEAVY RAINS SPREADING OUT OVER THE INTERIOR COASTAL PLAINS EAST OF
AUSTIN...WHILE OTHER SHOWERS AND THUNDERSTORMS RE-DEVELOP OVER THE
WESTERN HILL COUNTRY...

AT 655 PM...RADAR SHOWED RAINS AND THUNDERSTORMS INCREASING IN AREAL
COVERAGE WEST OF SAN ANTONIO AND SPREADING TOWARDS THE NORTHEAST AT
25 MPH.  LIGHT TO MODERATE RAINS TO THE EAST WERE ALSO SPIRALING BACK
WESTWARD FROM THE COASTAL PLAINS BACK INTO THE IH35 CORRIDOR BETWEEN
SAN MARCO...AUSTIN AND TEMPLE.

MOTORISTS ARE ADVISED TO USE CAUTION ON WET ROADS AND UNDER REDUCED
VISIBILITIES.  DO NOT ATTEMPT TO CROSS FLOODED LOW WATER CROSSINGS.
JVD

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 19, 8:22 PM CSTFlash Flood WarningEWXWilson5 hr
Nov 19, 9:06 PM CSTFlash Flood WarningEWXBexar4 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.