Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 59, NWS Austin/San Antonio, TX

June 4, 1987Atascosa County, Frio County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 4, 1987, 7:57 PM CDT for Atascosa County, Frio County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 4, 1987, 7:57 PM CDT (00:57 UTC)
Expired
Jun 5, 1987, 12:00 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Atascosa County, TX, Frio 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 00:00Z, 1.0 hours before the alert went out and 187 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 00:00Z on 1987-06-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 167 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 00:00Z on 1987-06-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939Sfc1 km3 km6 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
167 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1053 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
87 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 050057
FFWSAT
TXC013-163-050500-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
757 PM CDT THU JUN 4 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL MIDNIGHT CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
          ...ATASCOSA...FRIO
 
THE SHERIFFS DEPARTMENTS IN BOTH ATASCOSA AND FRIO COUNTIES REPORT
NUMEROUS SECONDARY ROADS AND LOW WATER CROSSINGS ARE STILL
EXPERIENCING FLASH FLOODING THIS EVENING.  WEATHER SERVICE RADAR
INDICATES MODERATE TO HEAVY RAIN CONTINUING OVER MUCH OF THE TWO
COUNTY AREA AND NO IMMEDIATE IMPROVEMENT IS EXPECTED.
 
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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 4, 11:45 PM CDTFlash Flood WarningEWXAtascosa, Frio3 hr
Jun 5, 4:43 AM CDTFlash Flood WarningEWXFrio3 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.