Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 51, NWS Austin/San Antonio, TX

September 6, 1986Kendall County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 6, 1986, 3:40 AM CDT for Kendall County, Kerr County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 6, 1986, 3:40 AM CDT (08:40 UTC)
Expired
Sep 6, 1986, 8:00 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Kendall County, TX, 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 00:00Z, 8.7 hours before the alert went out and 188 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 00:00Z on 1986-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2061 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 00:00Z on 1986-09-06The 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
2061 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
914 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.5
Supercell composite
4.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 060840
FFWSAT
TXC259-265-061300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANTONIO TX
340 AM CDT SAT SEP 6 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 800 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

SOUTH CENTRAL TEXAS...KENDALL AND KERR

AT 340 AM CDT STRONG THUNDERSTORMS WERE INDICATED BY RADAR NEAR
KERRVILLE AND COMFORT.  THUNDERSTORMS HAVE PERSISTED ALONG A
STATIONARY FRONT IN KERR AND KENDALL COUNTIES DURING THE EARLY
MORNING HOURS.  THE KERRVILLE DEPARTMENT OF PUBLIC SAFETY REPORTED
OVER THREE INCHES OF RAIN IN KERRVILLE SINCE MIDNIGHT.  A RISE IS
EXPECTED ALONG THE GUADALUPE RIVER..AND THE TRIBUTARIES LEADING
INTO THE RIVER.  PERSONS IN LOW LYING AREAS SHOULD MOVE TO HIGHER
GROUND IMMEDIATELY.

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.

DANGEROUS LIGHTNING AND GUSTY WINDS OFTEN ACCOMPANY FLASH FLOOD
PRODUCING THUNDERSTORMS.

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 OR 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, Sep 5, 10:25 PM CDT, 5 hours 15 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DEL RIO TX
1025 PM CDT FRI SEP 5 1986

AT 1015 PM RADAR INDICATED A LARGE AREA OF SHOWERS AND THUNDERSTORMS
OVER THE EASTERN HALF OF VAL VERDE COUNTY. THE STRONGEST THUNDERSTORM
WAS LOCATED NEAR THE ROUGH CANYON AREA OF LAKE AMISTAD. THUNDERSTORMS
WERE ALSO LOCATED WEST AND SOUTHWEST OF DEL RIO IN MEXICO. ANOTHER
AREA OF THUNDERSTORMS WAS LOCATED ACROSS SOUTHERN CROCKETT AND SUTTON
COUNTIES..ALSO FROM DEL RIO EAST TO SAN ANTONIO. THE PRECIPITATION
WAS MOVING TO THE NORTHEAST AT 10 TO 15 MPH.

RAINFALL REPORTED FROM WITHIN VAL VERDE COUNTY THIS EVENING HAS BEEN
NEAR 1/2 INCH..HOWEVER MAYFIELD STORE SOUTH OF JUNO REPORTED 1.57
INCHES.  AS RA	IN CONTINUES WATER WILL BEGIN TO ACCUMULATE IN LOW
WATER CROSSINGS.

MOTORISTS ARE CAUTIONED TO APPROACH LOW WATER CROSSINGS WITH CARE
AND TO SLOW DOWN ON WET PAVEMENT.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 5, 10:00 PM CDTFlash Flood WarningEWXBexar2 hr
Sep 6, 2:20 AM CDTFlash Flood WarningEWXTravis3 hr
Sep 6, 5:21 AM CDTFlash Flood WarningEWXBlanco3 hr
Sep 6, 7:44 AM CDTFlash Flood WarningEWXComal4 hr
Sep 6, 12:02 PM CDTFlash Flood WarningEWXComal118 min

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.