Alert archive / Louisiana / Tornado Warnings in 1990
Tornado Warning 15, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at May 31, 1990, 5:55 PM CDT for Iberia Parish, St. Mary Parish, Louisiana. It was in force for 65 min.
The area
The counties it named.
The facts
- Issued
- May 31, 1990, 5:55 PM CDT (22:55 UTC)
- Expired
- May 31, 1990, 7:00 PM CDT
- In force
- 65 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties Iberia Parish, LA, St. Mary 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.9 hours before the alert went out and 161 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
- 2563 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 585 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 312255 TORNEW LAC045-101-010000- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 555 PM CDT THU MAY 31 1990 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 700 PM CDT FOR RESIDENTS IN THE FOLLOWING PARISHES IN SOUTHEAST LOUISIANA ...IBERIA PARISH...ST.MARY PARISH AT 550 PM CDT REPORTS WERE RECEIVED FROM THE ACADIAN AIRPORT NEAR NEW IBERIA LOUISIANA OF A TORNADO APPROXIMATELY 15 MILES TO THE EAST OF THE AIRPORT. THIS TORNADO WAS PART OF A LINE OF SEVERE THUNDERSTORMS MOVING SOUTHWARD THROUGH THE AREA. IF YOU ARE IN THE PATH OF A TORNADO...THE SAFEST PLACE IS A BASEMENT. GET UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE...SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS... OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS.
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 31, 2:40 PM CDT, 3 hours 15 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-312035- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 235 PM CDT THU MAY 31 1990 A THUNDERSTORM WITH VERY HEAVY RAIN WAS LOCATED BETWEEN AMITE AND KENTWOOD LOUISIANA. STRONG GUSTY WINDS...SMALL HAIL AND FREQUENT LIGHTNING WILL ACCOMPANY THIS THUNDERSTORM AS IT MOVES SLOWLY EAST. OTHER THUNDERSTORMS AND AREAS OF RAIN WERE OCCURRING ALONG THE MISSISSIPPI STATE LINE. THE AREA WAS SHOWING VERY LITTLE MOVEMENT AND PEOPLE SHOULD BE ON THE LOOKOUT FOR POSSIBLE FLOODING OF STREETS OR ROADS. THUNDERSTORMS WITH HEAVY RAIN AND LARGE AREAS OF LIGHT RAIN CONTINUED OVER SOUTHERN MISSISSIPPI SOUTH OF JAKCSON TO NEAR PICAYUNE.
Special weather statement, May 31, 3:00 PM CDT, 2 hours 55 minutes before
LAZ006-008-009-312100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 300 PM CDT THU MAY 31 1990 ...A FLASH FLOOD WATCH IS IN EFFECT THIS AFTERNOON FOR AVOYELLES... CATAHOULA AND CONCORDIA PARISHES OF EAST CENTRAL LOUISIANA... RADAR SHOWED STRONG THUNDERSTORMS NORTH OF A LINE FROM HATTISBURG MS SOUTHWEST TO NEAR BATON ROUGE THEN NORTHWEST TO ALEXANDRIA AND FORT POLK. THIS AREA IS MOVING SLOWLY SOUTHWARD. AS THESE THUNDERSTORMS MOVE THROUGH THE AREA...THEY WILL PRODUCE STRONG GUSTY WINDS...VERY HEAVY RAIN...DANGEROUS LIGHTNING STRIKES AND POSSIBLY SOME SMALL HAIL. THE HEAVY RAIN ALONG WITH THE SLOW MOVEMENT WILL CAUSE FLOODING OF ROADWAYS..UNDERPASSES AND LOW LYING AREAS PRONE TO FLOODING. DUE TO THE FACT THAT MANY RIVERS IN CENTRAL LOUISIANA ARE AT OR NEAR FLOOD AT THE PRESENT TIME...RUNOFF FROM THESE HEAVY RAINS WILL BE SLOW. PEOPLE ARE ADVISED NOT TO DRIVE THROUGH FLOODED AREAS. . THIS AREA OF THUNDERSTORMS WILL CONTINUE MOVING SOUTH OVER EAST CENTRAL LOUISIANA FOR THE NEXT SEVERAL HOURS AND WILL LIKELY DECREAE LATE THIS AFTERNOON OR EARLY TONIGHT. PEOPLE SHOULD KEEP ABREAST OF THE WEATHER SITUATION AND BE PREPARED TO TAKE ACTION IF SEVERE WEATHER IS SIGHTED OR A WARNING IS ISSUED.
Special weather statement, May 31, 3:38 PM CDT, 2 hours 17 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-312135- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 335 PM CDT THU MAY 31 1990 ...HEAVY RAINS FALLING OVER SOUTHEAST LOUISIANA NORTH OF LAKE PONTCHARTRAIN... A THUNDERSTORM WITH VERY HEAVY RAIN CONTINUED OVER KENTWOOD LOUISIANA. STRONG GUSTY WINDS...SMALL HAIL AND FREQUENT LIGHTNING WILL ACCOMPANY THIS THUNDERSTORM AS IT MOVES VERY SLOWLY EAST. OTHER THUNDERSTORMS WITH HEAVY RAIN WERE OCCURRING BETWEEN BATON ROUGE AND KENTWOOD TO NEAR BOGALUSA. THE AREA WAS SHOWING VERY LITTLE MOVEMENT AND FOR THIS REASON WATER WILL ACCUMULATE ON STREETS AND ROADS. PEOPLE SHOULD BE ALERT TO THE POSSIBILITY OF FLOODING. KENTWOOD HAS REPORTED AROUND TWO AND ONE-HALF INCHES OF RAIN SINCE NOON. THUNDERSTORMS WITH HEAVY RAIN AND LARGE AREAS OF LIGHT RAIN CONTINUED OVER SOUTHERN MISSISSIPPI SOUTH OF JAKCSON TO NEAR PICAYUNE AND NEAR THE ALABAMA STATE LINE EAST OF HATTIESBURG.#
Special weather statement, May 31, 4:43 PM CDT, 1 hour 12 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-312300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE NEW ORLEANS LA 446 PM CDT THU MAY 31 1990 ...THE SEVERE THUNDERSTORM WARNING ISSUED EARLIER FOR TANGIPAHOA PARISH IS NO LONGER IN EFFECT...
Special weather statement, May 31, 4:49 PM CDT, 1 hour 6 minutes before
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
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 3:58 PM CDT | Severe Thunderstorm Warning | LIX | Livingston, Saint Helena | 47 min |
| May 31, 4:00 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 45 min |
| May 31, 4:11 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, West Baton Rouge | 49 min |
| May 31, 4:11 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee | 49 min |
| May 31, 4:45 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, East Baton Rouge, Livingston | 45 min |
| May 31, 4:45 PM CDT | Severe Thunderstorm Warning | LIX | Iberville, West Baton Rouge | 45 min |
| May 31, 5:30 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 45 min |
| May 31, 5:30 PM CDT | Severe Thunderstorm Warning | LIX | Iberville | 45 min |
| May 31, 5:33 PM CDT | Flash Flood Warning | LIX | Tangipahoa, Washington | 4 hr |
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.