Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 13, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 1, 1991, 9:47 AM CST for Jefferson Parish, Louisiana. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Mar 1, 1991, 9:47 AM CST (15:47 UTC)
- Expired
- Mar 1, 1991, 10:45 AM CST
- In force
- 58 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Jefferson Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 3.8 hours before the alert went out and 74 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
- 60 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 582 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 348 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm 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 1, 6:35 AM CST, 3 hours 12 minutes before
LAZ006-008-009-011300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 630 AM CST FRI MAR 1 1991 ...A TORNADO WATCH REMAINS IN EFFECT UNTIL 10AM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA AND ST. LANDRY PARISHES IN EAST CENTRAL LOUISIANA... RADAR SHOWED A BROKEN LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN FROM THE VIDALIA/NATCHEZ AREA...SOUTHWEST ACROSS CATAHOULA PARISH ...ACROSS ALEXANDRIA TO NEAR DE RIDDER. THIS LINE SHOWED LITTLE MOVEMENT WITH THE THUNDERSTORMS MOVING RAPIDLY NORTHEAST ALONG THE LINE. ELSEWHERE LARGE AREAS OF RAIN AND NUMEROUS THUNDERSTORMS COVERED MOST OF LOUISIANA...EXCEPT FOR THE EXTREME SOUTHEAST AND SOUTH CENTRAL PART. PEOPLE THROUGHOUT ALL OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METRO AREA...CAN EXPECT SOME FLOODING OF STREETS...UNDERPASSES AND LOW LYING AREAS FROM THE HEAVY RAIN AND BE ALERT TO DEVELOPING STRONG THUNDERSTORMS THROUGHOUT THE DAY. MOTORIST ARE URGED TO ALLOW EXTRA TIME TO REACH YOUR DESTINATION THIS MORNING.
Special weather statement, Mar 1, 7:15 AM CST, 2 hours 32 minutes before
LAZ006-008-009-011405- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 710 AM CST FRI MAR 1 1991 ...A TORNADO WATCH IS IN EFFECT UNTIL NOON FOR PEOPLE IN ALL OF EAST CENTRAL LOUISIANA... RADAR SHOWED A SOLID LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN FROM NEAR EUNICE...SOUTH TO THE COAST. THESE THUNDERSTORMS ARE MOVING RAPIDLY NORTHEAST AND WILL MOVE TO SOUTHERN AVOYELLES AND ST. LANDRY PARISHES WITHIN THE HALF HOUR. A BROKEN LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN CONTINUED ACROSS CATAHOULA AND CONCORDIA PARISHES EXTENDING SOUTHWEST ACROSS ALEXANDRIA. THIS LINE SHOWED LITTLE MOVEMENT WITH THE THUNDERSTORMS MOVINT RAPIDLY NORTHEAST ALONG THE LINE. ELSEWHERE...LARGE AREAS OF RAIN AND SEVERAL THUNDERSTORMS COVERED MOST OF LOUISIANA...AND WILL CONTINUE TO DEVELOP THROUGHOUT THE DAY. PEOPLE THROUGHOUT EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METRO AREA...CAN EXPECT THE HEAVY RAIN TO PRODUCE FLOODING OF STREETS ...LOW LYING AREAS AND UNDERPASSES AS THE THUNDERSTORMS MOVE THROUGH. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD B E ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Mar 1, 7:41 AM CST, 2 hours 6 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-011435- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 735 AM CST SAT MAR 1 1991 ...A TORNADO WATCH IS IN EFFECT UNTIL NOON FOR ALL OF SOUTHEAST LOUISIANA... A BAND OF THUNDERSTORMS WITH VERY HEAVY RAIN EXTENDED FROM ABOUT 30 MILES SOUTHWEST OF NEW ORLEANS INTERNATIONAL AIRPORT...NORTH ACROSS LAKE PONTCHARTRAIN TO NEAR COVINGTON. THEY WERE PART OF A LARGE AREA OF THUNDERSTORMS AND PATCHES OF LIGHT RAIN OVER SOUTHEAST LOUISIANA INCLUDING METROPOLITAN NEW ORLEANS...AND SOUTHERN MISSISSIPPI. FREQUENT LIGHTNING...STRONG GUSTY WINDS...AND LOCALLY HEAVY RAINS WILL ACCOMPANY THESE THUNDERSTORMS AS THEY MOVE NORTHEAST ABOUT, 40 MILES AN HOUR. BOATERS ON LAKES PONTCHARTRAIN AND LAKE MAUREPAS SHOULD BE ALERT FOR STRONGER WINDS AND HIGHER WAVES NEAR THE THUNDERSTORMS.
Special weather statement, Mar 1, 7:52 AM CST, 1 hour 55 minutes before
LAZ006-008-009-011500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 750 AM CST FRI MAR 1 1991 ...A TORNADO WATCH IS IN EFFECT UNTIL NOON FOR PEOPLE IN ALL OF EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METRO AREA... RADAR SHOWED A SOLID LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN FROM NEAR SIMMESPORT...SOUTH NEAR MELVILLE AND KROTZ SPRINGS... CONTINUING SOUTH TO THE COAST. THIS LINE WAS MOVING EAST ABOUT 40 MPH AND WILL MOVE TO SOUTHERN CONCORDIA...WEST FELICIANA...POINTE COUPEE...WEST BATON ROUGE AND IBERVILLE PARISHES WITHIN THE HALF HOUR AND TO EAST FELICIANA...EAST BATON ROUGE AND ASCENSION PARISHES WITHIN THE HOUR. ELSEWHERE...LARGE AREAS OF RAIN AND SEVERAL THUNDERSTORMS COVERED MOST OF LOUISIANA...AND WILL CONTINUE TO DEVELOP THROUGHOUT THE DAY. < IN ADDITION TO THE POSIBILITY OF DEVELOPING SEVERE WEATHER...PEOPLE THROUGHOUT EAST CENTRAL LOUISIANA...INCLUDING THE BATON ROUGE METRO AREA...CAN EXPECT THE HEAVY RAIN TO PRODUCE FLOODING OF STREETS... LOW LYING AREAS AND UNDERPASSES AS THE THUNDERSTORMS MOVE THROUGH. REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH DAREA. PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Mar 1, 8:50 AM CST, 57 minutes before
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<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
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</html>The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 8:27 AM CST | Severe Thunderstorm Warning | LIX | East Baton Rouge, West Baton Rouge | 48 min |
| Mar 1, 8:42 AM CST | Tornado Warning | LIX | Ascension, Livingston | 48 min |
| Mar 1, 8:42 AM CST | Tornado Warning | LIX | East Baton Rouge | 18 min |
| Mar 1, 8:48 AM CST | Tornado Warning | LIX | Saint Helena | 42 min |
| Mar 1, 8:48 AM CST | Tornado Warning | LIX | East Feliciana | 12 min |
| Mar 1, 9:02 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 58 min |
| Mar 1, 9:43 AM CST | Severe Thunderstorm Warning | LIX | Lafourche, Saint Charles, Saint John the Baptist | 62 min |
| Mar 1, 9:43 AM CST | Severe Thunderstorm Warning | LIX | Saint James | 62 min |
| Mar 1, 9:47 AM CST | Severe Thunderstorm Warning | LIX | Orleans, Plaquemines, Saint Bernard | 58 min |
| Mar 1, 9:59 AM CST | Severe Thunderstorm Warning | LIX | Saint Tammany | 31 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1991Every severe thunderstorm warning in 1991
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.