Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 29, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 27, 1990, 6:03 PM CDT for Ascension Parish, Livingston Parish, Louisiana. It was in force for 57 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
- May 27, 1990, 6:03 PM CDT (23:03 UTC)
- Expired
- May 27, 1990, 7:00 PM CDT
- In force
- 57 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Ascension Parish, LA, Livingston 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 |
|---|---|---|---|
| May 27, 6:05 PM CDT | Hail 1.75 | Livingston, 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 12:00Z, 11.1 hours before the alert went out and 108 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
- 1682 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 650 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KBTR 272302 RRA
SVRBTR
LAC005-063-280000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BATON ROUGE LA
603 PM CDT SUN MAY 27 1990
THE NATIONAL WEATHER SERVICE IN BATON ROUGE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM CDT
FOR PEOPLE IN THE FOLLOWING PARISHES...
IN EAST CENTRAL LOUISIANA
...ASCENSION...LIVINGSTON
RADARS SHOWED A LINE OF SEVERE THUNDERSTORMS FROM SOUTH OF CLINTON
SOUTHWEST ACROSS EAST AND WEST BATON ROUGE PARISHES INTO IBERVILLE
PARISH. THE LINE OF SEVERE THUNDERSTORMS WAS MOVING TO THE SOUTHEAST
AT 30 MPH.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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.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, May 27, 2:45 PM CDT, 3 hours 18 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-272035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 235 PM CDT SUN MAY 27 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM CDT FOR THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA... ASSUMPTION..IBERIA..ST. MARY..UPPER ST. MARTIN...LOWER ST. MARTIN AND THE ADJOINING COASTAL WATERS OF IBERIA AND ST MARY PARISHES. SCATTERED THUNDERSTORMS SOME WITH VERY HEAVY RAIN CONTINUED IN SOUTHWEST MISSISSIPPI AND ALSO CONTINUED TO DEVELOP IN CENTRAL LOUISIANA, THESE STORMS EXTENDED FROM NEAR ALEXANDRIA EAST ACROSS NATCHEZ AND MC COMB TO NEAR HATTIESBURG MISSISSIPPI. THESE STORMS HAVE INCREASED IN STRENGTH AND COVERAGE OVER THE LAST HOUR WHILE THE STRONGEST STORM IS LOCATED 5 MILES NORTHWEST OF MC COMB MOVEMENT WAS SOUTHEAST AT 30 MILES AN HOUR.
Special weather statement, May 27, 2:47 PM CDT, 3 hours 16 minutes before
LAZ006-008-009-272100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 245 PM CDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8PM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA...IBERVILLE...POINTE COUPEE... ST. LANDRY AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... RADAR SHOWED CLUSTERS OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN FROM NORTHERN CATAHOULA PARISH...SOUTHWEST TO ALEXANDRIA..THEN SOUTH TO NEAR VILLE PLATTE. MOVEMENT WAS EAST ABOUT 35 MPH. THESE THUNDERSTORMS WILL MOVE TO AVOYELLES...CONCORDIA AND ST. LANDRY PARISHES WITHIN THE HOUR. ELSEWHERE RADAR SHOWED NUMEROUS STRONG THUNDERSTORMS OVER NORTHEAST AND WEST CENTRAL LOUISIANA AND SOUTHWEST MISSISSIPPI. SCATTERED THUNDER- STORMS WERE OCCURRING BETWEEN BATON ROUGE AND OPELOUSAS. < REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THUNDERSTORMS PRODUCING DAMAGING WINDS AND LARGE HAIL IN AND CLOSE TO THE WATCH AREA. PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 27, 3:27 PM CDT, 2 hours 36 minutes before
LAZ006-008-009-272145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 245 PM CDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8PM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA...IBERVILLE...POINTE COUPEE... ST. LANDRY AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... MARBLE SIZE HAIL WAS REPORTED IN THE ENTERPRISE COMMUNITY IN EXTREME NORTHERN PART OF CATAHOULA PARISH AROUND 3PM BY THE SHERIFFS OFFICE. RADAR SHOWED A LARGE STRONG THUNDERSTORM WITH VERY HEAVY RAIN AND HAIL OVER POINTE COUPEE PARISH BETWEEN NEW ROADS AND LIVONIA. A SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL EXTENDED FROM NEAR FERRIDAY IN CONCORDIA PARISH EXTENDING SOUTHWEST ACROSS ALEXANDRIA. MOVEMENT WAS EAST ABOUT 35 MPH. THESE THUNDERSTORMS WILL CONTINUE MOVING THROUGH THE WATCH AREA THIS AFTERNOON AND PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 27, 3:30 PM CDT, 2 hours 33 minutes before
LAZ006-008-009-272145- SPECIAL WEATHER STATEMENT...CORRECTED ISSUE TIME NATIONAL WEATHER SERVICE BATON ROUGE LA 325 PM CDT SUN MAY 27 1990 ...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 8PM FOR PEOPLE IN AVOYELLES...CATAHOULA...CONCORDIA...IBERVILLE...POINTE COUPEE... ST. LANDRY AND WEST FELICIANA PARISHES IN EAST CENTRAL LOUISIANA... MARBLE SIZE HAIL WAS REPORTED IN THE ENTERPRISE COMMUNITY IN EXTREME NORTHERN PART OF CATAHOULA PARISH AROUND 3PM BY THE SHERIFFS OFFICE. RADAR SHOWED A LARGE STRONG THUNDERSTORM WITH VERY HEAVY RAIN AND HAIL OVER POINTE COUPEE PARISH BETWEEN NEW ROADS AND LIVONIA. A SOLID LINE OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND HAIL EXTENDED FROM NEAR FERRIDAY IN CONCORDIA PARISH EXTENDING SOUTHWEST ACROSS ALEXANDRIA. MOVEMENT WAS EAST ABOUT 35 MPH. THESE THUNDERSTORMS WILL CONTINUE MOVING THROUGH THE WATCH AREA THIS AFTERNOON AND PEOPLE IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, May 27, 3:48 PM CDT, 2 hours 15 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-272135- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 335 PM CDT SUN MAY 27 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM CDT FOR ALL OF SOUTHEAST LOUISIANA... SCATTERED THUNDERSTORMS SOME WITH VERY HEAVY RAIN CONTINUED IN SOUTHWEST MISSISSIPPI AND CENTRAL LOUISIANA, THESE STORMS WERE LOCATED FROM NEAR DERIDDER NORTHEAST ACROSS ALEXANDRIA TO NEAR VICKSBURG AND EAST ACROSS NATCHEZ AND MCCOMB TO NEAR HATTIESBURG MISSISSIPPI. THESE STORMS HAVE INCREASED IN STRENGTH AND COVERAGE OVER THE LAST HOUR WHILE THE STRONGEST STORM IS LOCATED 40 MILES SOUTHWEST OF MC COMB ELSHWHERE AN ISOLATED THUNDERSTORM DEVEL"OPED NEAR MOBILE ALABAMA MOVEMENT OF THESE STORMS IS SOUTHEAST 35 MILES AN HOUR.
Special weather statement, May 27, 4:43 PM CDT, 1 hour 20 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-272235- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 435 PM CDT SUN MAY 27 1990 A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 10 PM CDT FOR ALL OF SOUTHEAST LOUISIANA... NUMEROUS THUNDERSTORMS SOME WITH VERY HEAVY RAIN CONTINUED IN SOUTHWEST MISSISSIPPI AND CENTRAL LOUISIANA. THESE THUNDERSTORMS EXTENDED FROM 20 MILES NORTH OF LAKE CHARLES LOUISIANA TO THE NORTHEAST ACROSS SIMMESPORT INTO SOUTHWEST MISSISSIPPI ACROSS MC COMB TO THE HATTIESBURG AREA. THESE THUNDERSTORMS HAVE PRODUCED WINDS OF OVER 60 MILES AN HOUR IN CENTRAL LOUISIANA AND ARE ACCOMPANIED WITH VERY HEAVY RAIN AND DANGEROUS LIGHTNING. ELSHWHERE...A FEW THUNDERSTORMS WERE OCCURRING ALONG THE LOUISIANA/ MISSISSIPPI STATE LINE SOUTH AND SOUTHEAST OF MC COMB MISSISSIPPI. A FEW RAINSHOWERS DEVELOPED DURING THE PAST HOUR OVER SOUTHEAST LOUISIANA BETWEEN NEW ORLEANS AND BATON ROUGE. ALSO...As FEW SHOWERS AND AN ISOLATED THUNDERSTORMS CONTINUED OVER SOUTHEAST MISSISSIPPI 10 MILES NORTH OF PASCAGOULA. THE BAND OF NUMEROUS THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AT BETWEEN 25 AND 30 MILES AN HOUR.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 27, 4:18 PM CDT | Severe Thunderstorm Warning | LIX | Avoyelles, Concordia, Pointe Coupee | 42 min |
| May 27, 4:59 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 61 min |
| May 27, 5:12 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 63 min |
| May 27, 5:13 PM CDT | Severe Thunderstorm Warning | LIX | Saint Helena | 62 min |
| May 27, 5:27 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Iberville, West Baton Rouge | 63 min |
| May 27, 6:08 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 67 min |
| May 27, 6:16 PM CDT | Severe Thunderstorm Warning | LIX | Livingston | 44 min |
| May 27, 6:19 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 26 min |
| May 27, 6:28 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 62 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.