Alert archive / Louisiana / Flash Flood Warnings in 1992
Flash Flood Warning 4, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Jul 21, 1992, 3:20 PM CDT for Jefferson Parish, Orleans Parish, Louisiana. It was in force for 115 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1992, 3:20 PM CDT (20:20 UTC)
- Expired
- Jul 21, 1992, 5:15 PM CDT
- In force
- 115 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Jefferson Parish, LA, Orleans Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.3 hours before the alert went out and 51 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
- 2282 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 542 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 32 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 212020 FFWNEW LAC051-071-212215- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 320 PM CDT TUE JUL 21 1992 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 515 PM CDT FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...WESTERN ORLEANS PARISH ...NORTHERN JEFFERSON PARISH STRONG THUNDERSTORMS CONTINUE TO DUMP HEAVY RAINFALL ON THE NEW ORLEANS AREA. RAINFALL TOTALS OF AROUND 3 INCHES IN 1 HOUR HAVE BEEN REPORTED FROM PORTIONS OF UPTOWN AND MID-CITY IN NEW ORLEANS. WEATHER SERVICE RADAR AT 315 PM CDT ALSO INDICATED VERY HEAVY RAINFALL OCCURRING IN THE METAIRIE AREA AN ON THE WEST BANK. WIDESPREAD AND SIGNIFICANT FLOODING OF LOW-LYING STREETS AND UNDERPASSES IS EXPECTED AS HEAVY RAINS CONTINUE DURING THE REST OF THE AFTERNOON. 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, Jul 21, 1:49 PM CDT, 1 hour 31 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-212000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY ....DATE... NATIONAL WEATHER SERVICE NEW ORLEANS LA 140 PM CDT TUE JUL 21 1992 AT 130 PM...SHOWERS AND THUNDERSTORMS BECAME MORE NUMEROUS OVER SOUTHEAST LOUISIANA DURING THE PAST HOUR WITH SOME ISOLATED THUNDERSTORMS PRODUCING HEAVY RAIN ESPECIALLY OVER THE METRO NEW ORLEANS AREA AS WELL AS OVER DONALDSONVILLE AND HAMMOND. THIS WAS PART OF AN AREA THAT EXTENDED FROM LAFAYETTE NORTHEAST OVER MOST OF SOUTHEAST LOUISIANA AND CONTINUED INTO SOUTHWEST MISSISSIPPI. THESE THUNDERSTORMS WERE MOVING VERY LITTLE...SO PEOPLE SHOULD BE ALERT TO THE POSSIBILITY OF STREET FLOODING NEAR THE HEAVIER THUNDERSTORMS. SCATTERED THUNDERSTORMS CONTINUED ALONG THE MISSISSIPPI AND ALABAMA BORDER FROM GULFPORT TO MOBILE.
Special weather statement, Jul 21, 1:51 PM CDT, 1 hour 29 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-212000- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY ....DATE... NATIONAL WEATHER SERVICE NEW ORLEANS LA 140 PM CDT TUE JUL 21 1992 AT 130 PM...SHOWERS AND THUNDERSTORMS BECAME MORE NUMEROUS OVER SOUTHEAST LOUISIANA DURING THE PAST HOUR WITH SOME ISOLATED THUNDERSTORMS PRODUCING HEAVY RAIN ESPECIALLY OVER THE METRO NEW ORLEANS AREA AS WELL AS OVER DONALDSONVILLE AND HAMMOND. THIS WAS PART OF AN AREA THAT EXTENDED FROM LAFAYETTE NORTHEAST OVER MOST OF SOUTHEAST LOUISIANA AND CONTINUED INTO SOUTHWEST MISSISSIPPI. THESE THUNDERSTORMS WERE MOVING VERY LITTLE...SO PEOPLE SHOULD BE ALERT TO THE POSSIBILITY OF STREET FLOODING NEAR THE AREAS OF GREATEST RAINFALL. SCATTERED THUNDERSTORMS CONTINUED ALONG THE MISSISSIPPI AND ALABAMA BORDER FROM GULFPORT TO MOBILE.
Special weather statement, Jul 21, 2:40 PM CDT, 40 minutes before
LAZ006-008-009-212030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 240 PM CDT TUE JUL 21 1992 ...THUNDERSTORMS WITH HEAVY RAIN MOVING ACROSS SOUTHERN LIVINGSTON... ASCENSION AND IBERVILLE PARISHES... RADAR SHOWED THUNDERSTORMS FROM LAKE MAUREPAS TO WHITE CASTLE MOVING NORTH SLOWLY. THE STRONGER THUNDERSTORMS WILL CAUSE PERIODS OF HEAVY RAIN WITH FLOODING TO ROADS AND LOW AREAS...MOTORISTS SHOULD BE ALERT AND ALLOW EXTRA TIME TO TRAVEL. THESE CONDITIONS WILL CONTINUE AS THUNDERSTORMS DEVELOPE AND MOVE ACROSS ALL OF EAST CENTRAL LOUISIANA THIS AFTERNOON AND EVENING.
Special weather statement, Jul 21, 2:51 PM CDT, 29 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-212100- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 245 PM CDT TUE JUL 21 1992 AT 240 PM...NUMEROUS SHOWERS AND THUNDERSTORMS SOME PRODUCING VERY HEAVY RAIN CONTINUED OVER MOST OF SOUTHEAST LOUISIANA ESPECIALLY OVER THE METRO NEW ORLEANS AREA AS WELL AS BETWEEN BATON ROUGE AND MORGAN CITY. THIS WAS PART OF AN AREA THAT EXTENDED FROM LAFAYETTE NORTHEAST OVER MOST OF SOUTHEAST LOUISIANA AND CONTINUED INTO SOUTHWEST MISSISSIPPI. THESE THUNDERSTORMS WERE MOVING VERY LITTLE...SO PEOPLE SHOULD BE ALERT TO THE POSSIBILITY OF STREET FLOODING NEAR THE AREAS OF GREATEST RAINFALL. SCATTERED THUNDERSTORMS CONTINUED ALONG THE MISSISSIPPI AND ALABAMA BORDER FROM GULFPORT TO MOBILE.
Special weather statement, Jul 21, 3:00 PM CDT, 20 minutes before
LAZ013-212000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 220 PM CDT TUE JUL 21 1992 ...STRONG THUNDERSTORMS DUMPING HEAVY RAINFALL ON NEW ORLEANS AREA... ...SIGNIFICANT STREET FLOODING POSSIBLE... THUNDERSTORMS CONTINUE TO STRENGTHEN OVER THE NEW ORLEANS METROPOLITAN AREA. NEARLY AN INCH AND TWO THIRDS OF RAIN /1.60/ FELL DURING THE 30 MINUTES ENDING AT 215 PM NEAR THE SHORE OF LAKE PONTCHARTRAIN IN NEW ORLEANS. RADAR INDICATED VERY HEAVY RAINFALL ALSO OVER THE KENNER- METAIRIE AREA AND OVER PORTIONS OF THE WEST BANK. MOTORISTS THROUGHOUT THE NEW ORLEANS METRO AREA SHOULD EXERCISE EXTREME CAUTION DURING THE REST OF THE AFTERNOON FOR THE POSSIBILITY OF SIGNIFICANlT FLOODING OF LOW-LYING STREETS AND UNDERPASSES.
Special weather statement, Jul 21, 3:04 PM CDT, 16 minutes before
LAZ013-212030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NEW ORLEANS LA 300 PM CDT TUE JUL 21 1992 ...RAINFALL TOTALS APPROACHING THREE INCHES IN PARTS OF NEW ORLEANS... AS OF 300 PM CDT RAINFALL TOTALS IN NEW ORLEANS RANGED UP TO TWO AND THREE/QUARTERS INCHES IN 1 HOUR AT CHANNEL 8 IN MID-CITY AND NEARLY TWO AND A HALF INCHES /2.45/ IN LESS THAN 1 HOUR AT AUDUBON PARK IN UPTOWN. VERY HEAVY RAIN ALSO WAS FALLING OVER PORTIONS OF THE WEST BANK AND IN METAIRIE. FREQUENT LIGHTNING STRIKES ALSO WERE REPORTED THROUGHOUT MUCH OF THE NEW ORLEANS METRO AREA. MOTORISTS THROUGHOUT THE NEW ORLEANS METRO AREA SHOULD EXERCISE EXTREME CAUTION DURING THE REST OF THE AFTERNOON FOR THE POSSIBILITY OF THE FLOODING OF LOW-LYING STREETS AND UNDERPASSES.
Nearby
Flash Flood Warnings in Louisiana, 1992Every flash flood warning in 1992
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.