Alert archive / Louisiana / Flash Flood Warnings in 1986

Flash Flood Warning 28, NWS Shreveport, LA

June 27, 1986De Soto Parish, Louisiana; Panola County, Texas

NWS Shreveport, LA issued this flash flood warning at Jun 27, 1986, 8:15 AM CDT for De Soto Parish, Louisiana; Panola County, Texas. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Jun 27, 1986, 8:15 AM CDT (13:15 UTC)
Expired
Jun 27, 1986, 11:30 PM CDT
In force
15 hr
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties De Soto Parish, LA, Panola 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

Longview/Gregg, TX (KGGG), launched 12:00Z, 1.3 hours before the alert went out and 61 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, Longview/Gregg, TX at 12:00Z on 1986-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 682 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, Longview/Gregg, TX at 12:00Z on 1986-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 square meters per square second.193958Sfc1 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
682 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
715 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
0.4
Supercell composite
5.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 271325
FFWSHV
TXC365-203-067-037-ARC091-073-LAC017-031-015-119-271630-

BULLETIN...EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
815 AM CDT FRI JUN 27 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE
UNTIL 1130 AM CDT   FOR PEOPLE IN THE FOLLOWING COUNTIES/PARISHES

IN NORTHEAST TEXAS...NORTHEAST HALF OF PANOLA..HARRISON..MARION..CASS
                     AND THE SOUTHERN TWO THIRDS OF BOWIE.

IN NORTHWEST LOUISIANA...NORTHWEST HALF OF DESOTO...CADDO...BOSSIER AND
                         WEBSTER...THIS INCLUDES THE SHREVEPORT/BOSSIER
                         CITY METROPOLIAN AREA.

IN SOUTHWEST ARKANSAS...SOUTHERN HALF OF MILLER AND LAFAYETTE

FLOODING CONTINUES OVER THE NORTHWEST LOUISIANA PARISHES OF DESOTO...
CADDO..BOSSIER AND PARTS OF WEBSTER AND IN THE NORTHEAST TEXAS COUNTIES
OF PANOLA...HARRISON...MARION AND CASS. MAJOR FLOODING REPORTED IN SOME
AREAS WITH NUMEROUS ROADS CLOSED...INCLUDING SOME MAJOR ROADWAYS..BAYOUS
ARE IN FLOOD...WITH MAJOR FLOODING IN LOW LYING AREAS ALONG THE BAYOU
SYSTEMS...INCLUDING THE SHREVEPORT METROPOLITAN AREA...IN THE MARSHALL
AREA...AND THE JEFFERSON TEXAS AREA.

FLOODING WILL DEVELOP NORTH AND NORTHEASTWARD INTO BOWIE COUNTY TEXAS
AND PARTS OF MILLER AND LAFAYETTE COUNTIES IN SOUTWEST ARKANSAS.

INDICATIONS ARE THE REMNANTS OF BONNIE HAS PRODUCED EXCESSIVE RAINFALL
OVERNIGHT OVER EXTREME NORTHWEST LOUISIANA AND THE ADJANCENT AREAS OF
NORTHEAST TEXAS. RAINFALL HAS EXCEED FOUR INCHES OVER MUCH OF DESOTO
...CADDO...BOSSIER AND WEBSTER PARISHES IN NORTHWEST LOUISIANA AND OVER
NORTHERN SHELBY...PANOLA...HARRISON...MARION AND CASS COUNTIES IN NORTH
EAST TEXAS. RAINFALL OF FIVE TO SEVEN INCHES HAS OCCURRED IN SEVERAL
LOCATIONS AND WILL EXCEED EIGHT INCHES IN SOME AREAS BY MID MORNING.

A FEW REPORTS...NWS SHREVEPORT 6.42 INCHES...KEITHVILLE LOUISIANA 7.17
INCHES...JEFFERSON TEXAS 6.78 INCHES...NORTH BOSSIER CITY 6.58 INCHES
...BETHANY TEXAS 7.37 INCHES. SEVERAL REPORTS OF OVER FIVE INCHES.

MAJOR FLOODING WILL CONTINUE TO DEVELOP ON THE SMALL STREAM AND BAYOU
SYSTEMS THIS MORNING THROUGHOUT THE WARNED AREA...ADDITIONAL RAODWAYS
WILL BE AFFECTED...AND LARGE BAYOUS WILL OVERFLOW AND CONTINUE IN FLOOD
TODAY.

MOTORISTS ARE URGED NOT TO DRIVE THROUGH FLOOD WATERS..MANY ROADS ARE
IMPASSABLE. RESIDENTS ALONG THE BAYOUS SYSTEMS SHOULD REMAKN ALERT FOR
RISING WATER THOUGHOUT THE DAY IN THE LOWER REACH OF THESE SYSTEMS.

AT 815 AM CDT THE WEATHER SERVICE RADAR INDICATED WIDESPREAD SHOWERS
OVER NORTHWEST AND NORTHCENTRAL LOUISIANA ACROSS THE EASTERN TIER OF
NORTHEAST TEXAS COUNTIES INTO THE ADJACENT AREA OF SOUTHWEST ARKANSAS.

WITHIN THE LARGE RAIN AND SHOWER MASS...BANDS OF HEAVY SHOWERS AND
THUNDERSTORMS PRODUCING ADDITIONAL HEAVY RAINFALL WERE LOCATED FROM
THE MINDEN AND HOMER AREA OF NORTHWEST LOUISIANA ACROSS THE NORTHERN
SECTIONS OF THE SHREVEPORT ARE TO NORTHEAST OF MARSHALL TO THE
JEFFERSON TEXAS AREA TO 20 MILES SOUTHWEST OF TEXARKANA. ONLY A SLOW
NORTHEAST DRIFT IS TAKING PLACE WITH THIS SYSTEM. SHOWERS AND HEAVY
THUNDERSTORMS CONTINUE TO MOVE ACROSS THE SAME GENERAL AREA.

SHOWERS AND THUNDERSTORMS WERE DECREASING SOUTHWEST OF A LINE FROM
MANSFIELD LOUISIANA TO NORTHEAST OF CARTHAGE TEXAS TO SOUTHWEST OF
JEFFERSON TEXAS...INCRESSING ALONG THE LOUISIANA/ARKANSAS BORDER
WEST INTO THE LINDEN TEXAS AREA.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 27, 2:30 AM CDTFlash Flood WarningSHVCaddo, De Soto4 hr
Jun 27, 2:30 AM CDTFlash Flood WarningSHVBossier4 hr
Jun 27, 5:20 AM CDTFlash Flood WarningSHVBossier, Webster3 hr
Jun 27, 5:20 AM CDTFlash Flood WarningSHVDe Soto3 hr
Jun 27, 5:20 AM CDTFlash Flood WarningSHVCaddo3 hr
Jun 27, 8:15 AM CDTFlash Flood WarningSHVCaddo15 hr
Jun 27, 8:15 AM CDTFlash Flood WarningSHVBossier, Webster15 hr
Jun 26, 9:20 PM CDTFlash Flood WarningSHVPanola3 hr
Jun 27, 4:40 AM CDTFlash Flood WarningSHVHarrison4 hr
Jun 27, 7:30 AM CDTFlash Flood WarningSHVCass4 hr
Jun 27, 8:15 AM CDTFlash Flood WarningSHVBowie15 hr

Nearby

Flash Flood Warnings in Louisiana, 1986Flash 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.