Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 43, NWS Austin/San Antonio, TX

June 18, 1986Bandera County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 18, 1986, 9:55 AM CDT for Bandera County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jun 18, 1986, 9:55 AM CDT (14:55 UTC)
Expired
Jun 18, 1986, 1:00 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bandera 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

Del Rio, TX (KDRT), launched 12:00Z, 2.9 hours before the alert went out and 160 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, Del Rio, TX at 12:00Z on 1986-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 758 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, Del Rio, TX at 12:00Z on 1986-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 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
758 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
665 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
51 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 
TTAAOO KSAT 181444
FFWSAT
TXC019-181800-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
955 AM CDT WED JUN 18 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 100 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY:
 
IN SOUTH CENTRAL TEXAS
          ..BANDERA

AT 950 AM CDT RADAR CONTINUED TO INDICATE A BROAD AREA OF STRONG
THUNDERSTORMS COVERING MUCH OF BANDERA COUNTY. STORMS ARE MOVING
TOWARD THE NORTH AT LESS THAN 10 MPH. RAINFALL BETWEEN 3 AND 5 INCHES
HAS BEEN REPORTED IN PORTIONS OF BANDERA COUNTY THIS MORNING AND RAIN
CONTINUES.
 
A FLASH FLOOD WARNING CONTINUES IN EFFECT UNTIL NOON FOR BEXAR
COUNTY.
 
A FLASH FLOOD WATCH IS IN EFFECT TODAY FOR MOST OF SOUTHCENTRAL
TEXAS.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
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 MOVE UP TO HIGHER GROUND.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES, DIPS, OR LOW SPOTS IF WATER COVERjS THE
ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM, EVEN A SMALL ONE,
ON FOOT.

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 18, 6:25 AM CDT, 3 hours 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
620 AM CDT WED JUN 18 1986

..A LARGE AREA OF HEAVY RAINFALL IS LOCATED SOUTH OF GILLESPIE..BLANCO
    AND HAYS COUNTY MOVING SLOWLY NORTHWARD..

THIS LARGE AREA OF RAIN HAS ALREADY PRODUCED TWO TO FOUR INCHES OF
RAINFALL OVER PORTIONS OF BEXAR COUNTY THROUGH THE NIGHT..CAUSING A
FLASH FLOOD WARNING TO BE ISSUED FOR BEXAR COUNTY UNTILL MID MORNING.

AS THIS AREA SPREADS NORTHWARD..PERSONS IN GILLESPIE..BLANCO AND HAYS
COUNTY SHOULD BE ON THE ALERT FOR HEAVY RAINFALL THIS MORNING..THAT MAY
PRODUCE FLASH FLOODING IN LOW LYING AREAS AND LOW WATER CROSSINGS.

ADDITIONAL STATEMENTS WILL BE ISSUED IF NEEDED THIS MORNING.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 4:26 AM CDTFlash Flood WarningEWXBexar5 hr
Jun 18, 6:45 AM CDTFlash Flood WarningEWXBandera3 hr
Jun 18, 8:56 AM CDTFlash Flood WarningEWXBexar3 hr

Nearby

Flash Flood Warnings in Texas, 1986Every flash flood warning in 1986

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.