Alert archive / Texas / Flash Flood Warnings in 1986

Flash Flood Warning 71, NWS Fort Worth, TX

September 2, 1986Johnson County, Texas

NWS Fort Worth, TX issued this flash flood warning at Sep 2, 1986, 6:12 AM CDT for Johnson County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Sep 2, 1986, 6:12 AM CDT (11:12 UTC)
Expired
Sep 2, 1986, 10:15 AM CDT
In force
4 hr
Issued by
NWS Fort Worth, TX
Area
Whole counties

County Johnson 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

Stephenville/Cla, TX (KSEP), launched 00:00Z, 11.2 hours before the alert went out and 71 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, Stephenville/Cla, TX at 00:00Z on 1986-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 207 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, Stephenville/Cla, TX at 00:00Z on 1986-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 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
207 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
858 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
31 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 KFTW 021112
FFWFTW
TXC251-021515-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
612 AM CDT TUE SEP  2 1986
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 1015 AM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES:
 
IN NORTH CENTRAL TEXAS
          ..JOHNSON

AT 615 AM CDT A CLUSTER OF VERY HEAVY THUNDERSTORMS WAS LOCATED OVER
JOHNSON COUNTY. THESE THUNDERSTORMS HAD BEEN SITTING OVER THE SAME
AREA FOR THE PAST HOUR OR SO AND AS A RESULT A LARGE AMOUNT OF RAIN
HAD FALLEN.
 
THE SHERIFFS DEPARTMENT REPORTED THAT ROADS IN CLEBURNE WERE
BEGINNING TO FILL WITH WATER AND ANY FURTHER RAINFALL SHOULD RESULT
IN THE CLOSURE OF SEVERAL ROADS POSSIBLY MORE.
 
THESE STORMS WERE DRIFTING VERY SLOWLY TO THE NORTHEAST AND SHOULD
CONTINUE TO LINGER OVER JOHNSON COUNTY FOR AT LEAST ANOTHER HALF AN
HOUR TO AN HOUR.  IN THIS LENGTH OF TIME ANOTHER 3 TO 5 INCHES COULD
ACCUMULATE.
 
 
MOST DEATHS IN FLASH FLOODING 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.

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 2, 3:39 AM CDT, 2 hours 33 minutes before
^FTWSPSACT

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WACO TX
 335 AM CDT TUE SEP 2 1986

...ISOLATED HEAVY THUNDERSTORMS OVER PORTIONS OF CENTRAL TEXAS...

AT 330 AM CDT RADAR INDICATED HEAVY THUNDERSTORMS OVER HILL COUNTY
NEAR HILLSBORO MOVING SLOWLY NORTHEAST. NO REPORTS OF FLOODING HAS
BEEN RECEIVED...BUT WITH THE SLOW MOVEMENT MINOR STREET FLOODING
AND FLOODING OF LOW WATER CROSSINGS MAY OCCUR.

MOTORIST ARE URGED TO DRIVE WITH CAUTBION THIS MORNING.

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 2, 7:25 AM CDTFlash Flood WarningFWDBosque4 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.