Alert archive / Louisiana / Flash Flood Warnings in 1987

Flash Flood Warning 9, NWS Shreveport, LA

November 16, 19874 parishes in Louisiana

NWS Shreveport, LA issued this flash flood warning at Nov 16, 1987, 4:25 PM CST for 4 parishes in Louisiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Nov 16, 1987, 4:25 PM CST (22:25 UTC)
Expired
Nov 16, 1987, 8:30 PM CST
In force
4 hr
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Franklin Parish, LA, Madison Parish, LA, Richland Parish, LA, Tensas Parish, LA

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

Jackson, MS (KJAN), launched 12:00Z, 10.4 hours before the alert went out and 134 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, Jackson, MS at 12:00Z on 1987-11-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 166 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, Jackson, MS at 12:00Z on 1987-11-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 412 square meters per square second.1939587897Sfc1 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
166 J/kg
Mixed-layer CIN
-109 J/kg
Mixed-layer LCL
707 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
412 m²/s²
0-3 km storm-relative helicity
733 m²/s²
Significant tornado parameter
0.3
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 162227
FFWSHV
LAC021-041-065-073-083-107-162230-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
425 PM CST MON NOV 16 1987

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL  830 PM CST FOR PEOPLE IN THE FOLLOWING PARISHES...

IN NORTHEAST LOUISIANA
          ...CALDWELL...FRANKLIN...MADISON
          ...OUACHITA...RICHLAND...TENSAS

A FLASH FLOOD WARNING MEANS FLOODING HAS OCCURRED WITHIN THE
WARNED AREA.

AT 415 PM WEATHER SERVICE RADAR IN SHREVEPORT SHOWED AN AREA OF
MOSTLY MODERATE TO HEAVY RAINFALL OVER THE EASTERN HALF OF LOUISIANA
GENERALLY EAST OF A LINE FROM FARMERVILLE SOUTH TO ALEXANDRIA. THE
RAIN WAS OCCURRING ON ALREADY SATURATED SOILS THAT HAVE RECEIVED
AMOUNTS OF 8 TO 14 INCHES. ADDITIONAL AMOUNTS OF 2 TO 3 INCHES
MAY FALL BEFORE RAINFALL ENDS LATE THIS AFTERNOON AND EARLY
EVENING.

STREAMS..BAYOUS..AND LAKES ARE OUT OF THEIR BANKS AND SHOULD
CONTINUE.

THE FLASH FLOOD WARNING FOR PARTS OF NORTHWEST LOUISIANA EXPIRE
AT 430 PM..HOWEVER RUNOFF IS NOT COMPLETE AND FLOODING IN THE LOWER
REACHES OF BAYOUS AND STREAMS WILL CONTINUE FOR THE NEXT DAY OR
TWO.  PERSONS LIVING ALONG THE BAYOUS AjND STREAMS SHOULD MONITOR
WATER LEVELS AND BE PREPARED TO EVACUATE AND PROTECT VALUABLES
IF RAPID RISES ARE OBSERVED.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 15, 6:20 PM CSTSevere Thunderstorm WarningSHVBossier, Caddo, De Soto70 min
Nov 15, 6:25 PM CSTTornado WarningSHVBossier, Caddo65 min
Nov 15, 6:25 PM CSTTornado WarningSHVDe Soto65 min
Nov 15, 7:25 PM CSTTornado WarningSHVBossier, Caddo, Webster65 min
Nov 15, 9:15 PM CSTSevere Thunderstorm WarningSHVMorehouse, Ouachita, Richland60 min
Nov 16, 12:20 AM CSTTornado WarningSHVFranklin, Tensas70 min
Nov 16, 12:30 AM CSTFlash Flood WarningSHVBossier, Caddo, De Soto4 hr
Nov 16, 1:45 AM CSTSevere Thunderstorm WarningSHVFranklin, Tensas60 min
Nov 16, 3:20 AM CSTSevere Thunderstorm WarningSHVTensas55 min
Nov 16, 4:15 AM CSTFlash Flood WarningSHVCaldwell, Jackson, Winn2 hr
Nov 16, 5:05 AM CSTSevere Thunderstorm WarningSHVMadison55 min
Nov 16, 9:47 AM CSTSevere Thunderstorm WarningSHVBossier, Webster58 min
Nov 16, 9:47 AM CSTSevere Thunderstorm WarningSHVCaddo58 min
Nov 16, 10:00 AM CSTFlash Flood WarningSHVCaldwell, Franklin, Jackson, Ouachita, Winn4 hr
Nov 16, 10:00 AM CSTFlash Flood WarningSHVDe Soto, Sabine4 hr
Nov 16, 10:00 AM CSTFlash Flood WarningSHVBienville, Bossier, Caddo, Natchitoches, Red River4 hr
Nov 16, 10:00 AM CSTFlash Flood WarningSHVClaiborne, Webster4 hr
Nov 16, 1:10 PM CSTSevere Thunderstorm WarningSHVFranklin, Madison, Tensas58 min
Nov 16, 4:25 PM CSTFlash Flood WarningSHVCaldwell, Ouachita4 hr

Nearby

Flash Flood Warnings in Louisiana, 1987Every flash flood warning in 1987

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.