Alert archive / Louisiana / Tornado Warnings in 1990
Tornado Warning 14, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at May 28, 1990, 11:56 AM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 34 min.
The area
The counties it named.
The facts
- Issued
- May 28, 1990, 11:56 AM CDT (16:56 UTC)
- Expired
- May 28, 1990, 12:30 PM CDT
- In force
- 34 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Lafourche Parish, LA, Terrebonne 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, 4.9 hours before the alert went out and 128 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 91 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 281656 TORNEW LAC057-109-281730- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1156 AM CDT MON MAY 28 1990 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 1230 PM CDT FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...SOUTHERN LAFOURCHE PARISH...SOUTHERN TERREBONNE PARISH AND THE ADJACENT COASTAL WATERS OF SOUTHEAST LOUISIANA. PETROLEUM HELICOPTERS REPORTED A TORNADO 15 MILES SE OF HOUMA LOUISIANA AT 1149 AM CDT. THE TORNADO WAS MOVING SOUTHEAST. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR [LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
What forecasters said that day
The local office's own words before this tornado 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 28, 8:11 AM CDT, 3 hours 45 minutes before
LAZ006-008-009-281510- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 810 AM CDT MON MAY 28 1990 ...THUNDERSTORMS WITH VERY HEAVY RAIN WERE MOVING ACROSS PARTS OF EAST CENTRAL LOUISIANA... RADAR SHOWED A SOLID LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN AND STRONG GUSTY WIND FROM ALEXANDRIA...SOUTHWEST ACROSS OAKDALE TO JUST WEST OF EUNICE. A CLUSTER OF THUNDERSTORMS CONTINUED ACROSS SOUTHERN CATAHOULA AND CONCORDIA PARISHES. MOVEMENT WAS SOUTHEAST ABOUT 30 MPH. THE LINE OF THUNDERSTORMS WILL MOVE TO AVOYELLES AND ST. LANDRY PARISHES WITHIN THE HALF HOUR AND TO SOUTHERN CONCORDIA AND POINTE COUPEE PARIEHES WITHIN THE NEXT ONE TO TWO HOURS. PEOPLE IN THESE AREAS CAKN EXPECT TEMPORARY FLOODING OF STREETS AND LOW LYING AREAS AND STRONG GUSTY WIND AS THE THUNDERSTORMS PASS THROUGH THIS MORNING.
Special weather statement, May 28, 10:12 AM CDT, 1 hour 44 minutes before
LAZ008-009-281600- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 1010 AM CDT MON MAY 28 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1PM FOR PEOPLE IN EAST BATON ROUGE AND SURROUNIDNG PARISHES AS WELL AS ST. LANDRY PARISH... RADAR SHOWED A SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND STRONG GUSTY WIND FROM JUST EAST OF CLINTON...SOUTHWEST ACROSS BATON ROUGE AND PLAQUEMINE TO THE COAST. MOVEMENT WAS SOUTHEAST ABOUT 35 MPH. THE WIND GUSTED TO 31 MPH AND NEARLY A HALF INCH RAIN FELL IN THE PAST HALF HOUR AS THE THUNDERSTORMS MOVED THROUGH THE BATON ROUGE METRO AIRPORT. THESE THUNDERSTORMS WILL MOVE THROUGH ASCENSION...LIVINGSTON AND ST. LANDRY PARISHES WITHIN THE HALF HOUR. TEMPORARY FLOODING OF STREETS AND LOW LYING AREAS CAN BE EXPECTED ALONG WITH STRONG GUSTY WIND AS THESE THUNDERSTORMS PASS THROUGH. ELSEWHERE...RADAR SHOWED A SOLID AREA OF RAIN FROM MCCOMB TO NATZHEZ ...ALEXANDRIA AND FORT POLK...SOUTH TO BATON ROUGE...LAFAYETTE AND LAKE CHARLES. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS PRODUCING LARGE HAIL AND DAMAGING WINDS IN AND CLOSE TO THE WATCH AREA. PEOPLE 8IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 7:00 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Saint Charles | 60 min |
| May 27, 7:05 PM CDT | Severe Thunderstorm Warning | LIX | Plaquemines, Saint Bernard | 55 min |
| May 28, 8:44 AM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, Saint Landry | 61 min |
| May 28, 10:51 AM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 69 min |
| May 28, 11:22 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 68 min |
Nearby
Tornado Warnings in Louisiana, 1990Every tornado warning in 1990Tornadoes 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.