Alert archive / Louisiana / Flash Flood Warnings in 1990

Flash Flood Warning 20, NWS Shreveport, LA

March 29, 1990Bossier Parish, Caddo Parish, Louisiana

NWS Shreveport, LA issued this flash flood warning at Mar 29, 1990, 9:00 AM CST for Bossier Parish, Caddo Parish, Louisiana. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Mar 29, 1990, 9:00 AM CST (15:00 UTC)
Expired
Mar 29, 1990, 11:00 AM CST
In force
2 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, 3.0 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 1990-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 95 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 1990-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 197 square meters per square second.19395878Sfc1 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
95 J/kg
Mixed-layer CIN
-158 J/kg
Mixed-layer LCL
930 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
197 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSHV 291503
FFWSHV
LAC015-017-291700-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
900 AM CST THU MAR 29 1990
 
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1100 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS..
 
IN NORTHWEST LOUISIANA
 
   ...SOUTHERN BOSSIER PARISH...SOUTHERN CADDO PARISH
 
AT 900 AM CST...NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT INDICATED
TUNDERSTORMS PRODUCING HEAVY RAINS MOVING ACROSS THE
SHREVEPORT/BOSSIER CITY METROPOLITAN AREA. MOVEMENT WAS EAST NORTHEAST
AT 25 MILES AN HOUR. FLOODING OF STREETS AND UNDERPASSES ARE LIKELY
WITH THE PASSAGE OF THESE THUNDERSTORMS.
 
 
DO ANOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

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, Mar 29, 3:35 AM CST, 5 hours 25 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-291100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
330 AM CST THU MAR 29 1990

...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED TO DEVELOP OVER PARTS
OF NORTHEAST TEXAS..WHILE RAIN AND SHOWERS LINGERED OVER PARTS OF
SOUTHEAST OKLAHOMA AS WELL AS OVER EAST CENTRAL TEXAS ACROSS CENTRAL
LOUISIANA INTO THE SOUTHERN SECTIONS OF NORTHWEST LOUISIANA...

...A FLASH FLOOD WATCH IS IN EFFECT FOR NORTHEAST TEXAS...

AT 325 AM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED A
60 MILE WIDE AREA OF RAIN AND SHOWERS THAT EXTENDED FROM NEAR NATCHEZ
MISSISSIPPI ACROSS ALEXANDRIA LOUISIANA TO NEAR LUFKIN TEXAS. ALSO...
SCATTERED SHOWERS AND THUNDERSTORMS WERE IN A 30 MILE WIDE AREA THAT
EXTENDED FROM NEAR CENTER TEXAS ACROSS MARSHALL AND LONGVIEW TO
SOUTHWEST OF PARIS TEXAS. OTHER SHOWERS WERE NOTED IN A 20 MILE WIDE
AREA THAT EXTENDED FROM NEAR SMITHVILLE OKLAHOMA TO PARIS TEXAS.
.
THE RAIN...SHOWERS AND THUNDERSTORMS WILL CONTINUE TO INCREASE OVER
THE REGION AND SOME WILL PRODUCE LOCALLY HEAVY RAINS THAT WILL CAUSE
SOME FLOODING OF STREETS AND LOW LYING AREAS EARLY THIS MORNING.

THE RAIN...SHOWERS AND THUNDERSTORMS WERE MOVING EAST NORTHEAST AT
20 TO 25 MILES AN HOUR.
Special weather statement, Mar 29, 5:34 AM CST, 3 hours 26 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-291300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
530 AM CST THU MAR 29 1990

...FLASH FLOOD WATCHES ARE NOW IN EFFECT FOR NORTHEAST TEXAS..
SOUTHEAST OKLAHOMA..AND SOUTHWEST ARKANSAS...

AT 520 AM THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT WAS INDICATING
AN AREA OF SHOWERS AND THUNDERSTORMS OVER NORTHEAST TEXAS AND SOUTHEAST
OKLAHOMA WHICH WAS INCREASING IN AREAL COVERAGE. ONE AREA OF SHOWERS AND
THUNDERSTORMS EXTENDED FROM NORTH OF SHREVEPORT NEAR VIVIAN NORTHWESTWARD
THROUGH DANGERFIELD TEXAS. A SECOND AREA OF SHOWERS AND THUNDERSTORMS..
WHICH APPEARS TO BE FORMING A LINE..EXTENDED FROM MENA ARKANSAS SOUTHWEST
THROUGH PARIS TEXAS TO NEAR GREENVILLE TEXAS. THE SHOWERS AND THUNDER-
STORMS WERE MOVING TOWARD THE EAST NORTHEAST AT 20 TO 25 MPH. SOME OF
THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING BRIEF VERY HEAVY RAINFALL
AND WIND GUSTS OF UP TO 35 MPH.
.
OTHER SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUED OVER
PARTS OF EAST CENTRAL TEXAS AND WEST CENTRAL LOUISIANA.

IN ADDITION TO THE AREAS OF THUNDERSTORMS..DENSE FOG CONTINUES TO
COVER PORTIONS OF THE ARKLA'TEX. AT 500 AM THE VISIBILITY WAS 1/4
MILE AT THE SHREVEPORT REGIONAL AIRPORT. EARLY MORNING MOTORISTS
SHOULD DRIVE CAREFULLY THIS MORNING IN THE AREAS WHERE THE FOG IS
HAMPERING THE VISIBILITIES.
Special weather statement, Mar 29, 6:42 AM CST, 2 hours 18 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-291400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
635 AM CST THU MAR 29 1990

...FLASH FLOOD WATCHES REMAINED IN EFFECT FOR NORTHEAST TEXAS..
SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS...

AT 630 AM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED
A 15 MILE WIDE AREA OF THUNDERSTORMS THAT WERE PRODUCING HEAVY RAINS
AND GUSTY WINDS NEAR 35 MPH THAT EXTENDED FROM 10 MILES EAST OF MAUD
TEXAS TO SOUTHEAST OF QUITMAN TEXAS. THIS AREA OF THUNDERSTORMS WAS
WITHIN A LARGE AREA OF SHOWERS AND THUNDERSTORMS THAT EXTENDED FROM
SOUTHWEST OF TEXARKANA TO NEAR WAXAHACHIE TEXAS. THIS AREA WAS ABOUT
50 MILES WIDE. ANOTHER 60 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS
EXTENDED FROM WEST OF RINGGOLD LOUISIANA TO NEAR GILLHAM ARKANSAS.

ALSO A 15 MILE WIDE AREA OF SHOWERS WAS NOTED FROM NEAR MARSHALL
TEXAS TO SOUTH OF PLEASANT HILL LOUISIsANA.
OTHER SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS LINGERED OVER
PARTS OF EAST CENTRAL TEXAS AND WEST CENTRAL LOUISIANA.

MOVEMENT OF ALL THE SHOWERS AND THUNDERSTORMS WAS EAST NORTHEAST
NEAR 15 MILES AN HOUR.
Special weather statement, Mar 29, 7:47 AM CST, 1 hour 13 minutes before
OKZ026-TXZ022-023-027-028-032-033-ARZ009-010-011-016-LAZ001-002-
003-004-005-006-291500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
740 AM CST THU MAR 29 1990

...FLASH FLOOD WATCHES REMAINED IN EFFECT FOR NORTHEAST TEXAS..
SOUTHEAST OKLAHOMA AND SOUTHWEST ARKANSAS TODAY...

AT 735 AM CST THE NATIONAL WEATHER SERVICE RADAR IN SHREVEPORT SHOWED
A 12 MILE WIDE AREA OF THUNDERSTORMS THAT WERE PRODUCING HEAVY RAINS
AND GUSTY WINDS NEAR 35 MPH THAT EXTENDED FROM SPRINGHILL LOUISIANA TO
IDA LOUISIANA ACROSS KARNACK TEXAS TO NORTHWEST OF OVERTON TEXAS. THIS
AREA WAS WITHIN A LARGE AREA OF SHOWERS AND THUNDERSTORMS THE LEADING
EDGE OF WHICH EXTENDED FROM HAMPTON ARKANSAS TO ARCADIA LOUISIANA TO
COTTON VALLEY LOUISIANA TO SCOTTSVILLE TEXAS TO LONGVIEW TO PALESTINE
TEXAS. THIS PRECIPITATION EXTENDED NORTHWEST ACROSS SOUTHWEST ARKANSAS
AND NORTHEAST TEXAS INTO SOUTHEAST OKLAHOMA.

ALSO A 15 MILE WIDE AREA OF SHOWERS WAS NOTED FROM NORTHEAST OF
BOSSIER CITY TO SOUTHEAST OF HALL SUMMIT LOUISIANA.

YET ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WAS LOCATED IN A
25 MILE WIDE BAND THAT EXTENDED FROM NEAR ELYSIAN FIELDS TEXAS TO
LEESVILLE LOUISIANA. OTHER SHOWERS WERE NOTED FROM SAN AUGUSTINE
TEXAS ACROSS NACOGDOCHES TO NEAR CROCKETT TEXAS.

MOVEMENT OF ALL THE SHOWERS AND THUNDERSTORMS WAS EAST NORTHEAST
AT 20 TO 25 MILES AN HOUR...WHILE THE SYSTEM SAGGED TO THE SOUTHEAST
NEAR 10 MILES AN HOUR.

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.