Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 13, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 29, 1990, 10:17 PM CST for Lafourche Parish, Saint Charles Parish, Saint John the Baptist Parish, Louisiana. It was in force for 58 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 29, 1990, 10:17 PM CST (04:17 UTC)
- Expired
- Mar 29, 1990, 11:15 PM CST
- In force
- 58 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Lafourche Parish, LA, Saint Charles Parish, LA, Saint John the Baptist Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 29, 10:55 PM CST | Thunderstorm Wind 0 | St. Charles, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 4.3 hours before the alert went out and 82 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
- 16 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 1008 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 158 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 300418 SVRNEW LAC057-089-095-109-300515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 1017 PM CST THU MAR 29 1990 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 PM CST FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...LAFOURCHE PARISH...ST.CHARLES PARISH...ST.JOHN.BAPTIST PARISH ...EASTERN TERREBONNE PARISH AND THE ADJACENT COASTAL WATERS OF SOUTHEAST LOUISIANA. SLIDELL RADAR AT 1013 PM CST INDICATED A LINE OF POSSIBLY SEVERE THUNDERSTORMS ABOUT 10 MILES WIDE EXTENDING FROM THIBODAUX SOUTH TO HOUMA TO ABOUT 15 MILES WEST OF COCODRIE. THIS LINE OF THUNDERSTORMS IS MOVING EAST ABOUT 35 MPH WHILE IN INDIVIDUAL THUNDERSTORMS ARE MOVING EASTNORTHEAST ABOUT 40 MPH. SOME WIND DAMAGE HAS BEEN REPORTED IN SOME OF THE PARISHES WEST OF THIS LINE EARLY TONIGHT. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 8:06 PM CST | Severe Thunderstorm Warning | LIX | Iberia, Saint Martin, St. Mary | 69 min |
| Mar 29, 8:24 PM CST | Severe Thunderstorm Warning | LIX | Saint Landry | 51 min |
| Mar 29, 8:58 PM CST | Severe Thunderstorm Warning | LIX | Iberville, Pointe Coupee | 62 min |
| Mar 29, 9:17 PM CST | Severe Thunderstorm Warning | LIX | Assumption, Lafourche, Saint James, Terrebonne | 58 min |
| Mar 29, 9:25 PM CST | Severe Thunderstorm Warning | LIX | West Baton Rouge, West Feliciana | 65 min |
| Mar 29, 9:43 PM CST | Severe Thunderstorm Warning | LIX | Ascension, East Baton Rouge, East Feliciana | 62 min |
| Mar 29, 10:11 PM CST | Severe Thunderstorm Warning | LIX | Livingston, Saint Helena | 64 min |
| Mar 29, 10:17 PM CST | Severe Thunderstorm Warning | LIX | Terrebonne | 58 min |
| Mar 29, 10:34 PM CST | Tornado Warning | LIX | Lafourche | 26 min |
| Mar 29, 10:44 PM CST | Tornado Warning | LIX | Jefferson, Saint Charles | 61 min |
| Mar 29, 10:56 PM CST | Tornado Warning | LIX | Orleans | 64 min |
| Mar 29, 11:24 PM CST | Tornado Warning | LIX | Saint Tammany | 66 min |
| Mar 30, 12:22 AM CST | Tornado Warning | LIX | Saint Tammany | 48 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.