Alert archive / Louisiana / Flash Flood Warnings in 1990
Flash Flood Warning 9, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at May 13, 1990, 2:16 PM CDT for Orleans Parish, Plaquemines Parish, Saint Bernard Parish, Louisiana. It was in force for 119 min.
The area
The counties it named.
The facts
- Issued
- May 13, 1990, 2:16 PM CDT (19:16 UTC)
- Expired
- May 13, 1990, 4:15 PM CDT
- In force
- 119 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard 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 12:00Z, 7.3 hours before the alert went out and 49 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
- 567 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 579 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 131917 FFWNEW LAC051-071-075-087-089-132115- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 216 PM CDT SUN MAY 13 1990 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 415 PM CDT FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...JEFFERSON PARISH...ORLEANS PARISH...NORTHERN PLAQUEMINES PARISH ...ST.BERNARD PARISH...ST.CHARLES PARISH STREET FLOODING CONTINUES OVER THE WARNED AREA. THE AREA OF RAIN HAS DRIFTED SOUTH AND INTENSITIES HAVE DECREASED SOMEWHAT. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.7 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, May 13, 1:47 PM CDT, 29 minutes before
LAZ009-132000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 150 PM CDT SUN MAY 13 1990 ...THUNDERSTORMS WITH VERY HEAVY RAIN OCCURRING OVER IBERVILLE AND ASCENSION PARISHES OF EAST CENTRAL LOUISIANA... RADAR SHOWED STRONG THUNDERSTORMS OVER THE SOUTHERN HALF OF IBERVILLE AND ASCENSION PARISHES MOVING EAST AT 20 MPH. PEOPLE IN THESE PARISHES CAN EXPECT GUSTY WINDS...HEAVY RAIN WITH FLOODING OF STREETS AND OTHER LOW LYING AREAS...DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL DURING THE NEXT 2 HOURS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 10:07 AM CDT | Flash Flood Warning | LIX | Orleans, Saint Bernard | 2 hr |
| May 13, 10:07 AM CDT | Flash Flood Warning | LIX | Jefferson | 2 hr |
| May 13, 12:05 PM CDT | Flash Flood Warning | LIX | Orleans, Plaquemines, Saint Bernard | 115 min |
| May 13, 12:05 PM CDT | Flash Flood Warning | LIX | Jefferson, Saint Charles | 115 min |
| May 13, 2:16 PM CDT | Flash Flood Warning | LIX | Jefferson, Saint Charles | 119 min |
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.