Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 41, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 31, 1990, 4:11 PM CDT for East Baton Rouge Parish, West Baton Rouge Parish, Louisiana. It was in force for 49 min. 2 reports 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 31, 1990, 4:11 PM CDT (21:11 UTC)
- Expired
- May 31, 1990, 5:00 PM CDT
- In force
- 49 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
Counties East Baton Rouge Parish, LA, West Baton Rouge 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 31, 4:20 PM CDT | Thunderstorm Wind 0 | West Baton Rouge, LA | |
| May 31, 4:20 PM CDT | Thunderstorm Wind 0 | East Baton Rouge, 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, 9.2 hours before the alert went out and 147 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
- 1122 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 632 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 78 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBTR 312115 RRA SVRBTR LAC033-077-121-312200- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BATON ROUGE LA 411 PM CDT THU MAY 31 1990 THE NATIONAL WEATHER SERVICE IN BATON ROUGE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 500 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL LOUISIANA ...EAST BATON ROUGE PARISH...SOUTHERN POINTE COUPEE PARISH ...WEST BATON ROUGE PARISH RADAR SHOWED A SOLID LINE OF POSSIBLE SEVERE THUNDERSTORMS FROM NEAR MONTPEILER WEST ACROSS NEW ROADS/ST. FRANCISVILLE TO NEAR MELVILLE. MOVEMENT WAS SOUTH ABOUT 15 MPH. A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445PM FOR PEOPLE IN SOUTHERN ST. HELENA AND LIVINGSTON PARISHES. 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.T 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 31, 2:40 PM CDT, 1 hour 31 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, 1 hour 11 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, 33 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.#
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 | 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 |
| May 31, 5:55 PM CDT | Tornado Warning | LIX | Iberia, St. Mary | 65 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.