Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 66, NWS Austin/San Antonio, TX

October 5, 1986Medina County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 5, 1986, 11:08 PM CDT for Medina County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Oct 5, 1986, 11:08 PM CDT (04:08 UTC)
Expired
Oct 6, 1986, 3:15 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County 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

Del Rio, TX (KDRT), launched 00:00Z, 4.1 hours before the alert went out and 168 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 1986-10-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 115 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 1986-10-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
115 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
559 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 060418 COR
FFWSAT
TXC325-060815-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING...RESENT FOR DPS COMMUNICATIONS
NATIONAL WEATHER SERVICE SAN ANTONIO TX
1108 PM CDT SUN OCT 5 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 315 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTH CENTRAL TEXAS...MEDINA

THE NATIONAL WEATHER SERVICE OFFICE IN HONDO REPORTS 3.9 INCHES
OF RAIN FELL IN A ONE HOUR PERIOD FROM 1000 PM THROUGH 1100 PM
THIS EVENING.  THE MEDINA COUNTY SHERIFFS DEPARTMENT REPORTS
WATER UP TO THE CURBS ON MANY STREETS IN HONDO WITH LOW WATER
CROSSINGS LIKELY TO HAVE FLOOD PROBLEMS...ESPECIALLY OVER THE
CENTRAL AND EASTERN PART OF THE COUNTY.

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.

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 5, 8:00 PM CDTFlash Flood WarningEWXVal Verde5 hr
Oct 5, 11:27 PM CDTFlash Flood WarningEWXFrio4 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.