Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 52, NWS Austin/San Antonio, TX

September 6, 1986Blanco County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 6, 1986, 5:21 AM CDT for Blanco County, Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Sep 6, 1986, 5:21 AM CDT (10:21 UTC)
Expired
Sep 6, 1986, 8:30 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Blanco 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 00:00Z, 10.4 hours before the alert went out and 214 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 00:00Z on 1986-09-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1681 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 00:00Z on 1986-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
1681 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1176 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
16 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 
TTAA00 KAUS 061034
FFWAUS
TXC031-061330-

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

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 830 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTY OF

TEXAS...BLANCO

AT  515 AM CDT A HEAVY THUNDERSTORMS WERE OCCURING OVER BLANCO
COUNTY FROM NEAR BLANCO THROUGH THE JOHNSON CITY AREA. REPORTS
OF AS MUCH 4 INCHES HAS FALLEN OVER SOUTHERN AREAS OF THE COUNTY
AND HEAVY RAIN IN THE JOHNSON CITY AREA FOR THE LAST 2 HOURS.
THIS WILL LIKELY FLOOD MANY LOW WATER CROSSINGS AND LOW LYING
AREA.

REMEMBER THAT DEATHS DURING FLASH FLOODING ARE OFTEN RELATED TO
MOTORISTS DRIVING THROUGH FLOODED LOW WATER CROSSINGS.

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

PLEASE LISTEN TO YOUR LOCAL RADIO..TV..OR NOAA WEATHER RADIO FOR
LATER STATEMENTS REGARDING THIS HEAVY RAIN EPISODE.

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, 3:40 AM CDTFlash Flood WarningEWXKendall, Kerr4 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.