Alert archive / Texas / Flash Flood Warnings in 1987

Flash Flood Warning 80, NWS Austin/San Antonio, TX

June 13, 1987Bexar County, Medina County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 13, 1987, 7:20 AM CDT for Bexar County, Medina County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 13, 1987, 7:20 AM CDT (12:20 UTC)
Expired
Jun 13, 1987, 11:15 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Bexar County, TX, Medina 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, 0.3 hours before the alert went out and 196 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 1987-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1986 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 1987-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
1986 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
520 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 131220
FFWSAT
TXC029-325-131615-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
720 AM CDT SAT JUN 13 1987
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1115 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTH TEXAS
          ...BEXAR...MEDINA
 
AT 700 AM VERY HEAVY THUNDESTORMS HAVE DEVELOPED OVER MEDINA AND
THE WESTERN HALF OF BEXAR COUNTY.  THESE THUNDERSTORMS SHOW A VERY
SLOW EASTWARD MOVEMENT.  RAIN FALL AMOUNTS OF 3 TO 4 INCHES HAVE
ALREADY FALLEN OVER PARTS OF MEDINA COUNTY.
 
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.

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, Jun 13, 7:06 AM CDT, 14 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANTONIO TX
710 AM CDT SAT JUN 13 1987

AT 700 AM CDT THIS MORNING A HEAVY THUNDERSTORM WAS LOCATED OVER
CENTRAL BEXAR COUNTY WITH LIGHT TO MODERATE SHOWERS OVER THE REST
OF BEXAR COUNTY.  THE THUNDERSTORM OVER NORTH CENTRAL SAN ANTONIO HAS
SHOWN LITTLE MOVEMENT IN THE PAST HOUR.  HEAVY RAINS ARE FALLING FROM
THIS THUNDERSTORM AND A FLASH FLOOD WARNING MAY BE ISSUED FOR BEXAR
COUNTY IF THIS THUNJDERSTORM REMAINS STRONG AND NEARLY STATIONARY.

ADDITIONAL STATEMENTS WILL BE ISSUED AS NECESSARY.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 12, 10:17 PM CDTFlash Flood WarningEWXBlanco, Gillespie3 hr
Jun 12, 10:17 PM CDTFlash Flood WarningEWXBurnet, Hays, Travis, Williamson3 hr
Jun 13, 8:21 AM CDTFlash Flood WarningEWXAtascosa3 hr
Jun 13, 11:15 AM CDTFlash Flood WarningEWXMcMullen2 hr
Jun 13, 11:23 AM CDTFlash Flood WarningEWXBastrop, Caldwell3 hr
Jun 13, 12:06 PM CDTFlash Flood WarningEWXKinney, Uvalde3 hr
Jun 13, 12:16 PM CDTFlash Flood WarningEWXTravis3 hr
Jun 13, 1:46 PM CDTFlash Flood WarningEWXKerr, Real3 hr
Jun 13, 2:28 PM CDTFlash Flood WarningEWXBlanco, Burnet, Travis3 hr
Jun 13, 2:28 PM CDTFlash Flood WarningEWXWilliamson3 hr
Jun 13, 5:05 PM CDTFlash Flood WarningEWXVal Verde4 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.