Alert archive / Louisiana / Flash Flood Warnings in 1990
Flash Flood Warning 3, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Mar 9, 1990, 6:40 PM CST for Saint James Parish, Louisiana. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Mar 9, 1990, 6:40 PM CST (00:40 UTC)
- Expired
- Mar 9, 1990, 10:45 PM CST
- In force
- 4 hr
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Saint James 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
Slidell Radar S, LA (KSIL), launched 00:00Z, 0.7 hours before the alert went out and 108 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.
- Mixed-layer CAPE
- 667 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 100041 FFWNEW LAC093-100445- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 640 PM CST FRI MAR 9 1990 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 1045 PM CST FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...ST.JAMES PARISH SLIDELL RADAR AT 635 PM CST INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS MUCH OF ST JAMES PARISH. EMERGENCY MANAGEMENT OFFICIALS REPORTED AT 630 PM CST HEAVY RAIN WITH FLOODING IN SOME OF THE CITY OF CONVENT LOUISIANA. WATER WAS REPORTED IN SOME OF THE HOUSES IN CONVENT. FLOODING WAS ALSO REPORTED IN THE STREETS AND HIGHWAYS IN THE ST JAMES PARISH AREA. THUNDERSTORMS ARE MOVING SLOWLY NORTH ACROSS THE AREA WITH NEW DEVELOPMENT JUST TO THE SOUTH OF ST JAMES PARISH. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DOZ 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. TO ESCAPE RISING WATER MOVE UP 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 9, 3:42 PM CST, 2 hours 58 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-092300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 340 PM CST FRI MAR 9 1990 A STRONG THUNDERSTORM WAS LOCATED OVER SOUTHEAST LOUISIANA JUST SOUTHEAST OF PONTCHATOULA. IT WILL MOVE NORTH ACROSS PORTIONS OF TANGIPAHOA PARISH AND INTO THE WEST PORTION OF ST. TAMMANY PARISH DURING THE NEXT HOUR. THIS STORM WILL PRODUCE PERIODS OF VERY HEAVY RAIN AND STRONG AND GUSTY WINDS. SOME SMALL HAIL IS ALSO POSSIBLE. ELSEWHERE...WIDELY SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED BETWEEN FRANKLINTON AND SLIDELL AND EXTENDED SOUTHWEST TO BETWEEN NEW ORLEANS AND BATON ROUGE. THE THUNDERSTORMS WERE MOVING NORTH AT 15 MILESq AN HOUR.
Special weather statement, Mar 9, 4:46 PM CST, 1 hour 54 minutes before
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
Special weather statement, Mar 9, 5:27 PM CST, 1 hour 13 minutes before
LAZ009-100130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 525 PM CST FRI MAR 9 1990 ...STRONG THUNDERSTORMS WITH HEAVY RAIN WERE MOVING ACROSS PARTS OF THE BATON ROUGE METRO AREA... RADAR SHOWED A SOLID BAND OF STRONG THUNDERSTORMS WITH HEAVY RAIN FROM THE WHITE CASTLE/DONALDSONVILLE AREA EAST ACROSS ASCENSION AND SOUTHERN LIVINGSTON PARISHES. MOVEMENT WAS SLOWLY NORTH. THESE THUNDERSTORMS WILL PRODUCE PERIODS OF HEAVY RAIN AND STRONG GUSTY WIND AND POSSIBLY SOME SMALL HAIL. FLOODING OF STREETS AND LOW LYING AREAS WILL ALSO OCCUR AS THESE THUNDERSTORMS MOVE ACROSS SOUTHERN IBERVILLE...ASCENSION AND SOUTHERN LIVINGSTON PARISHES FOR THE NEXT TWO HOURS.
Special weather statement, Mar 9, 6:34 PM CST, 6 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-092300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 633 PM CST FRI MAR 9 1990 AT 630 PM SEVERAL STRONG THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE LOCATED OVER SOUTHEAST LOUISIANA...20 MILES WEST OF NEW ORLEANS AND BETWEEN BOGALUSA AND COVINGTON. THE THUNDERSTORMS WERE MOVING NORTH AT 10 MILES AN HOUR. PERSONS IN THE VICINITY OF THESE THUNDERSTORMS CAN EXPECT TO RECEIVE GUSTY WINDS...VERY HEAVY RAINFALL...DANGEROUS LIGHTNING AND POSSIBLY SOME SMALL HAIL. ALSO...FLOODING OF STREETS AND LOW LYING AREAS CAN BE EXPECTED WITH THESE THUNDERSTORMS. MOTORIST ARE URGED TO USE CAUTION WHILE DRIVING THROUGH THE HEAVY RAINFUALL. ELSEWHERE...WIDELY SCATTERED SHOWERS WERE OCCURRING WITHIN AREAS OF WIDESPREAD RAIN OVER SOUTHEAST LOUISIANA AND EXTENDED INTO A SMALL PART OF SOUTH MISSISSIPPI.
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.