Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 56, NWS Austin/San Antonio, TX

June 4, 1987Gonzales County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 4, 1987, 8:47 AM CDT for Gonzales County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 4, 1987, 8:47 AM CDT (13:47 UTC)
Expired
Jun 4, 1987, 12:45 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Gonzales County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Victoria Regiona, TX (KVCT), launched 12:00Z, 1.8 hours before the alert went out and 89 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, Victoria Regiona, TX at 12:00Z on 1987-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 824 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, Victoria Regiona, TX at 12:00Z on 1987-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
824 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
675 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
130 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 041347
FFWSAT
TXC177-041745-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
847 AM CDT THU JUN 4 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1245 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH TEXAS
          ...GONZALES
 
HEAVY SHOWERS AND THUNDERSTORMS CONTINUE TO MOVE OVER GONZALES
COUNTY.  THE HEAVY RAINS WILL LIKELY CONTINUE UNTIL LATE MORNING
BEFORE DECREASING BUT SINCE MANY AREAS ARE ALREADY FLOODED...THE
WATER WILL BE VERY SLOW TO RECEDE.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING 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.
 
PLEASE LISTEN TO YOUR LOCAL RADIO...TV OR NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS SEVERE WEATHER EVETNT.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 1:53 AM CDTFlash Flood WarningEWXGonzales3 hr
Jun 4, 3:10 AM CDTFlash Flood WarningEWXKendall110 min
Jun 4, 3:32 AM CDTFlash Flood WarningEWXCaldwell3 hr
Jun 4, 4:24 AM CDTFlash Flood WarningEWXTravis3 hr
Jun 4, 4:44 AM CDTFlash Flood WarningEWXLavaca2 hr
Jun 4, 5:02 AM CDTFlash Flood WarningEWXGonzales4 hr
Jun 4, 6:35 AM CDTFlash Flood WarningEWXLavaca2 hr
Jun 4, 7:31 AM CDTFlash Flood WarningEWXCaldwell, Hays, Travis6 hr
Jun 4, 8:30 AM CDTFlash Flood WarningEWXLavaca2 hr
Jun 4, 8:46 AM CDTFlash Flood WarningEWXBurnet, Williamson3 hr
Jun 4, 11:47 AM CDTFlash Flood WarningEWXBexar3 hr
Jun 4, 2:30 PM CDTSevere Thunderstorm WarningEWXCalhoun60 min
Jun 4, 4:08 PM CDTFlash Flood WarningEWXAtascosa, Frio4 hr

Nearby

Flash Flood Warnings in Texas, 1987Every flash flood warning in 1987

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.