Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 4, NWS Austin/San Antonio, TX

May 9, 1986Kerr County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 9, 1986, 4:48 PM CDT for Kerr County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 9, 1986, 4:48 PM CDT (21:48 UTC)
Expired
May 9, 1986, 8:45 PM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Kerr 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, 9.8 hours before the alert went out and 163 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 1986-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2443 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 1986-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 square meters per square second.1939587897Sfc1 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
2443 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
2.2
Supercell composite
11.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 092148
FFWSAT
TXC265-100145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
448 PM CDT FRI MAY 9 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 845 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTH CENTRAL TEXAS...KERR

AT 445 PM CDT STRONG THUNDERSTORMS CONTINUED ACROSS KERR COUNTY.
BETWEEN 3 AND 4 INCHES OF RAIN HAVE FALLEN IN WESTERN AND CENTRAL
PORTIONS OF THE COUNTY WITH WATER OVER SEVERAL ROADS.  ADDITIONAL
HEAVY RAINFALL IS EXPECTED.

A FLASH FLOOD WARNING MEANS FLOODING IS IMMINENT OR HAS BEEN
REPORTED.  TAKE NECESSARY PRECAUTIONS AS REQUIRED TO PROTECT LIFE
AND PROPERTY.

REMEMBER..DEATHS DURING FLASH FLOODING ARE FREQUENTLY RELATED TO
MOTORISTS DRIVING INTO FLOODED LOW WATER CROSSINGS.

 A FLASH FLOOD WATCH CONTINUES THROUGH TONIGHT FOR THE TEXAS
 HILL COUNTRY AND ADJACENT AREAS JUST TO THE SOUTH OF THE HILL
 COUNTRY.

IF THREATENING WEATHER APPROACHES..YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY.  YOU SHOULD ASK THE NEAREST LAW ENFORCEMENT AGENCY
TO RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL WEATHER
SERVICE OFFICE.

PLEASE LISTEN TO YOUR LOCAL RADIO..TV O=R NOAA WEATHER RADIO STATION
FOR LATER STATEMENTS OR WARNINGS REGARDING THIS HEAVY RAIN EVENT.

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, May 9, 4:14 PM CDT, 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN TX
415 PM CDT FRI MAY 9 1986

A TORNADO WATCH IS IN EFFECT FOR A LARGE PORTION OF CENTRAL TEXAS
UNTIL 10 PM THIS FRIDAY EVENING. THIS WATCH INCLUDES WILLIAMSON..
TRAVIS AND HAYS COUNTIES AND ALL COUNTIES TO THE WEST.. NORTHWEST
AND NORTH OF AUSTIN.

AT 415 PM WEATHER RADAR SHOWS A VERY HEAVY THUNDERSTORM 20 MILES
SOUTHWEST OF FREDERICKSBURG MOVING SLOWLY TOWARD THE NORTHEAST.

OTHER LIGHT SHOWERS ARE SOUTH AND WEST OF AUSTIN.

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 7:28 PM CDTSevere Thunderstorm WarningEWXMills62 min
May 8, 7:31 PM CDTSevere Thunderstorm WarningEWXWebb59 min
May 9, 3:22 PM CDTSevere Thunderstorm WarningEWXEdwards, Real68 min
May 9, 3:34 PM CDTSevere Thunderstorm WarningEWXKerr56 min
May 9, 4:04 PM CDTSevere Thunderstorm WarningEWXUvalde56 min
May 9, 4:35 PM CDTFlash Flood WarningEWXVal Verde4 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.