Alert archive / Louisiana / Flash Flood Warnings in 1990

Flash Flood Warning 15, NWS Shreveport, LA

March 8, 1990Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this flash flood warning at Mar 8, 1990, 7:28 AM CST for Bossier Parish, Caddo Parish, Louisiana. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Mar 8, 1990, 7:28 AM CST (13:28 UTC)
Expired
Mar 8, 1990, 10:30 AM CST
In force
3 hr
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Bossier Parish, LA, Caddo 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

Longview/Gregg, TX (KGGG), launched 12:00Z, 1.5 hours before the alert went out and 86 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 1990-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 66 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 1990-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 307 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
66 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
657 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
307 m²/s²
0-3 km storm-relative helicity
376 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 081330
FFWSHV
LAC015-017-081630-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
728 AM CST THU MAR 8 1990
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1030 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS..
 
IN NORTHWEST LOUISIANA
 
   ...NORTHERN BOSSIER PARISH...NORTHERN CADDO PARISH
 
AT 725 AM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT
SHOWED THUNDERSTORMS RETURNING TO MARION COUNTY...CADDO AND
BOSSIER PARISHES. THESE THUNDERSTORMS WERE LIKELY PRODUCING
HEAVY RAINS NEAR ONE INCH WITH THEIR PASSAGE.
 
AT 725 AM CST A LARGE AREA OF SHOWERS AND THUNDERSTORMS EXTENDED
NORTH OF A LINE FROM BASTROP TO COUSHATA LOUISIANA TO TYLER TEXAS.
THIS AREA EXTENDED NORTHWARD SOME 80 MILES. THUNDERSTORMS WERE
NOTED FROM TEXARKANA TO NAPLES TEXAS AND FROM COTTON VALLEY LOUISIANA
TO LAKE O THE PINES IN NORTHEAST TEXAS.
 
MOVEMENT OF THE SYSTEM WAS SOUTHEAST NEAR 15 MPH...WHILE THE STORMS
WERE MOVING EAST NORTHEAST NEAR 25 MPH.
 
RAINFALL AMOUNTS OVER THE WARNED AREA RANGED FROM TWO TO FOUR INCHES.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DE/PTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

Nearby

Flash Flood Warnings in Louisiana, 1990Every flash flood warning in 1990

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.