Alert archive / Louisiana / Flash Flood Warnings in 1990
Flash Flood Warning 2, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Feb 21, 1990, 10:20 PM CST for Jefferson Parish, Lafourche Parish, Saint Charles Parish, Louisiana. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Feb 21, 1990, 10:20 PM CST (04:20 UTC)
- Expired
- Feb 22, 1990, 2:15 AM CST
- In force
- 4 hr
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Jefferson Parish, LA, Lafourche Parish, LA, Saint Charles 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, 4.3 hours before the alert went out and 84 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
- 1 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 571 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 334 m²/s²
- 0-3 km storm-relative helicity
- 493 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KNEW 220424
FFWNEW
LAC051-057-089-103-117-220815-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1020 PM CST WED FEB 21 1990
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 215 AM CST
FOR PEOPLE IN THE FOLLOWING PARISHES...
IN SOUTHEAST LOUISIANA
...NORTHERN JEFFERSON...SOUTHERN LAFOURCHE...ST.CHARLES
...WESTERN ST.TAMMANY...WASHINGTON
WEATHER SERVICE RADAR SHOWS A LINE OF NUMEROUS THUNDERSTORMS...SOME
WITH HEAVY RAIN EXTENDING FROM SOUTH LAFOURCHE PARISH NORTH INTO THE
ST CHARLES...WEST JEFFERSON...WEST ST TAMMANY INTO WASHINGTON PARISH.
DUE TO THE SLOW EAST DRIFT OF THE LINE...PARISHES IN THE WARNED AREA
WILL RECEIVE VERY HEAVY RAINS DURING THE NEXT FEW HOURS. IT IS LIKELY
THAT THE FLASH FLOOD WARNING MAY HAVE TO BE EXTENDED TO COVER THE REST
OF THE NEW ORLEANS METROPOLITAN AREA LATER TONIGHT.
THE ST CHARLES OFFICE OF EMERGENCY PREPAREDNESS REPORTS NUMEROUS
STREETS ARE IMPASSABLE AND THAT FLOOD WATERS ARE ENTERING SOME HOMES.
IN LAFOURCHE PARISH SOME STREETS IN HOUMA ARE IMPASSBLE TO DUE FLOOD
WATERS. WHILE IN JEFFERSON PARISH THE KENNER POLICE HAVE CLOSED ONE
STRET SO FAR.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO 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, Feb 21, 4:48 PM CST, 5 hours 32 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-220000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 445 PM CST WED FEB 21 1990 ...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR LOUISIANA INCLUDING ALL OF SOUTHEAST LOUISIANA... ...A COASTAL FLOOD WATCH IS IN EFFECT TONIGHT AND THURSDAY FOR THE COASTAL AREAS FROM GULFPORT MISSISSIPPI WEST TO INTRACOASTAL CITY LOUISIANA... WIDESPREAD LIGHT RAIN ALONG WITH A FEW SHOWERS CONTINUED BETWEEN BATON ROUGE LOUISIANA AND MCCOMB MISSISSIPPI AND EXTENDED SOUTHEAST ACROSS MUCH OF SOUTHEAST LOUISIANA AND COASTAL SOUTHEAST MISSISSIPPI INTO THE ADJACENT COASTAL WATERS. THE RAIN CONTINUED TO SPREAD NORTH. A FLASH FLOOD WATCH MEANS THAT HEAVY RAIN COULD CAUSE FLOODING IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THE WATCH AREA ARE ADVISED TO MONITOR THE LATEST FORECASTS. CHECK PREPAREDNESS REQUIREMENTS...STAY AWAY FROM LOW LYING AREAS...AND BE READY TO TAKE QUICK ACTION IF IT BECOMES NECESSARY.
Special weather statement, Feb 21, 5:40 PM CST, 4 hours 40 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-220100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 545 PM CST WED FEB 21 1990 ...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR LOUISIANA INCLUDING ALL OF SOUTHEAST LOUISIANA... ...A COASTAL FLOOD WATCH IS IN EFFECT TONIGHT AND THURSDAY FOR THE COASTAL AREAS FROM GULFPORT MISSISSIPPI WEST TO INTRACOASTAL CITY LOUISIANA... SEVERAL BANDS OF SHOWERS ALONG WITH AND EXTENSIVE AREA OF LIGHT RAIN CONTINUED ACROSS MUCH OF SOUTHEAST LOUISIANA...THE COASTAL SECTIONS OF SOUTHEAST MISSISSIPPI AND SOUTHWEST ALABAMA...AND THE ADJACENT COASTAL WATERS. THE HEAVIER RAINFALL WAS OCCURRING WITH THE BANDS OF SHOWERS. ONE BAND WAS LOCATED FROM FRANKLINTON SOUTHWEST ACROSS THE WEST HALF OF LAKE PONTCHARTRAIN AND CONTINUED SOUTHWEST BETWEEN NEW ORLEANS AND HOUMA INTO THE COASTAL WATERS. ANOTHER BAND OF SHOWERS WAS LOCATED ACROSS THE MOUTH OF THE MISSSISSIPPI RIVER NORTH INTO BRETON SOUND. THE RAIN AND SHOWERS CONTINUED TO MOVE NORTH AT 40 MILES AN HOUR. A FLASH FLOOD WATCH MEANS THAT HEAVY RAIN COULD CAUSE FLOODING IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THE WATCH AREA ARE ADVISED TO MONITOR THE LATEST #FORECASTS. CHECK PREPAREDNESS REQUIREMENTS...STAY AWAY FROM LOW LYING AREAS...AND BE READY TO TAKE QUICK ACTION IF IT BECOMES NECESSARY.
Special weather statement, Feb 21, 6:46 PM CST, 3 hours 34 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-220200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 645 PM CST WED FEB 21 1990 ...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR LOUISIANA INCLUDING ALL OF SOUTHEAST LOUISIANA... ...A COASTAL FLOOD WATCH IS IN EFFECT TONIGHT AND THURSDAY FOR THE COASTAL AREAS FROM GULFPORT MISSISSIPPI WEST TO INTRACOASTAL CITY LOUISIANA... A BAND OF SHOWERS WAS INCREASING IN COVERAGE AND INTENSITY ACROSS SOUEAST LOUISIANA FROM THE COAST SOUTH OF HOUMA NORTH ACROSS HOUMA TO NEAR RESERVE. THE SHOWERS CONTINUED NORTH ACROSS LAKE MAUREPAS TO THE HAMMOND AND KENTWOOD AREAS. SOME OF THESE SHOWERS WERE PRODUCING PERIODS OF HEAVY RAIN. WITHIN THE LAST HALF HOUR THE HOUMA POLICE DEPARTMENT REPORTED STREED FLOODING IN THE CITY OF HOUMA. THESE SHOWERS CONTINUED TO MOVE NORTH ACROSS THE SAME AREA AND FLOODING OF STREETS AND LOW LYING AREAS IS POSSIBLE DURING THE NEXT HOUR OR TWO ESPECIALLY ACROSS TERREBONNE...NORTHERN LAFOURCHE...ST. JOHN THE BAPTIST...ST. CHARLES...AND TANGIPAHOA. RESIDENTS OF SOUTHEAST LOUISIANA SHOULD REMAIN ALERT THROUGH THE NIGHT FOR THE THREAT OF HEAVY RAIN AND FLASH FLOODING AND BE READY TO TAKE QUICK ACTION IF IT BECOMES NECESSARY. ELSEWHERE...ANOTHER BAND OF SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN...WAS LOCATED OVER THE COASTAL WATERS SOUTH OF GRAND ISLE AND EXTENDED NORTHEAST ACROSS BRETON SOUND TO THE COAST BETWEEN BILOXI MISSISSIPPI AND MOBILE BAY. AN EXTENSIVE AREA OF LIGHT RAIN CONTINUED ACROSS THE REMAINDER OF SOUTHEAST LOUISIANA.
Special weather statement, Feb 21, 7:44 PM CST, 2 hours 36 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-220300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 745 PM CST WED FEB 21 1990 ...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR LOUISIANA INCLUDING ALL OF SOUTHEAST LOUISIANA... ...A COASTAL FLOOD WATCH IS IN EFFECT TONIGHT AND THURSDAY FOR THE COASTAL AREAS FROM GULFPORT MISSISSIPPI WEST TO INTRACOASTAL CITY LOUISIANA... A BAND OF SHOWERS AND A FEW THUNDERSTORMS PRODUCING PERIODS OF HEAVY RAIN CONTINUED OVER THE COASTAL WATERS SOUTH OF TERREBONNE BAY AND EXTENDED NORTH ACROSS THE HOUMA AREA TO BETWEEN THIBODAUX AND RESERVE. THESE SHOWERS AND THUNDERSTORMS CONTINUED TO MOVE NORTH ACROSS THE SAME AREA AND FLOODING OF STREETS AND LOW LYING AREAS IS POSSIBLE DURING THE NEXT HOUR OR TWO ESPECIALLY ACROSS TERREBONNE...LAFOURCHE...ST JAMES... ST JOHN THE BAPTIST...AND ST CHARLES PARISHES. RESIDENTS OF SOUTHEAST LOUISIANA SHOULD REMAIN ALERT THROUGH THE NIGHT FOR THE THREAT OF HEAVY RAIN AND FLASH FLOODING AND BE READY TO TAKE QUICK ACTION IF IT BECOMES NECESSARY. ELSEWHERE...AN EXTENSIVE AREA OF LIGHT RAIN ALONG WITH A FEW SHOWERS AND THUNDERSTORMS CONINUED ACROSS MUCH OF SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI AND EXTENDED SOUTH INTO THE COASTAL WATERS.
Special weather statement, Feb 21, 8:50 PM CST, 1 hour 30 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-220400- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 845 PM CST WED FEB 21 1990 ...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR LOUISIANA INCLUDING ALL OF SOUTHEAST LOUISIANA... ...A COASTAL FLOOD WATCH IS IN EFFECT TONIGHT AND THURSDAY FOR THE COASTAL AREAS FROM GULFPORT MISSISSIPPI WEST TO INTRACOASTAL CITY LOUISIANA... A LINE OF SHOWERS AND THUNDERSTORMS HAD DEVELOPED OVER SOUTHEAST LOUISIANA FROM JUST WEST OF HAMMOND SOUTH ACROSS THE WEST PORTION OF LAKE PONTCHARTRAIN TO JUST WEST OF NEW ORLEANS INTERNATIONAL AIRPORT. THE LINE CONTINUED SOUTHWEST BETWEEN HOUMA AND GRAND ISLE AND ACROSS TERREBONNE BAY INTO THE COASTAL WATERS SOUTH OF HOUMA. THESE THUNDERSTORMS MAY PRODUCE STRONG AND GUSTY WINDS...PERIODS OF VERY HEAVY RAIN...AND POSSIBLY SOME SMALL HAIL. SOME FLOODING OF STREETS AND LOW LYING AREAS IS POSSIBLE AS THE HEAVIER RAINS CONTINUE TO MOVE NORTH ACROSS AREAS THAT ARE ALREADY SATURATED BY EARLIER RAINS. ELSEWHERE...AND EXTENSIVE AREA OF RAIN AND A FEW THUNDERSTORMS CONTINUED ACROSS MUCH OF SOUTHEAST LOUISIANA...SOUTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS. RESIDENTbS OF SOUTHEAST LOUISIANA SHOULD REMAIN ALERT THROUGH THE NIGHT FOR THE THREAT OF HEAVY RAIN AND FLASH FLOODING AND BE READY TO TAKE QUICK ACTION IF IT BECOMES NECESSARY.
Special weather statement, Feb 21, 9:50 PM CST, 30 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-220500- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 950 PM CST WED FEB 21 1990 ...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR ALL OF SOUTHEAST LOUISIANA... ...A COASTAL FLOOD WATCH IS IN EFFECT TONIGHT AND THURSDAY FOR THE COASTAL AREAS FROM GULFPORT MISSISSIPPI WEST TO INTRACOASTAL CITY LOUISIANA... A LINE OF THUNDERSTORMS CONTINUED OVER SOUTHEAST LOUISIANA FROM NEAR FRANKLINTON SOUTH BETWEEN HAMMOND AND COVINGTON AND ACROSS THE WEST PORTION OF LAKE PONTCHARTRAIN TO THE NEW ORLEANS INTERNATIONAL AIRPORT. THE LINE CONTINUED SOUTH BETWEEN HOUMA AND LAKE SALVADOR INTO THE COASTAL WATERS SOUTH OF TERREBONNE BAY. THESE THUNDERSTORMS MAY PRODUCE STRONG AND GUSTY WINDS...PERIODS OF VERY HEAVY RAIN...AND POSSIBLY SOME SMALL HAIL. IN ADDITION THESE THUNDERSTORMS HAVE PERSISTED OVER BASICALLY THE SAME AREA DURING THE PAST HOUR AND FLOODING OF STREETS AND LOW LYING AREAS IS POSSIBLE ESPECIALLY ACROSS LAFOURCHE...ST. CHARLES...NORTHERN JEFFERSON...AND WESTERN ST. TAMMANY PARISHES. ELSEWHERE...AN EXTENSIVE AREA OF RAIN AND A FEW THUNDERSTORMS CONTINUED ACROSS MUCH OF SOUTHEAST LOUISIANA...SOURTH MISSISSIPPI AND THE ADJACENT COASTAL WATERS. RESIDENTS OF SOUTHEAST LOUISIANA SHOULD REMAIN ALERT THROUGH THE NIGHT FOR THE THREAT OF HEAVY RAIN AND FLASH FLOODING AND BE READY TO TAKE QUICK ACTION IF IT BECOMES NECESSARY.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 10:20 PM CST | Flash Flood Warning | LIX | Saint Tammany, Washington | 4 hr |
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.