Alert archive / Louisiana / Tornado Warnings in 1988

Tornado Warning 2, NWS New Orleans, LA

May 21, 1988Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at May 21, 1988, 11:10 AM CDT for Tangipahoa Parish, Louisiana. It was in force for 50 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 21, 1988, 11:10 AM CDT (16:10 UTC)
Expired
May 21, 1988, 12:00 PM CDT
In force
50 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Tangipahoa 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

TimeReportWhereRemark
May 21, 11:20 AM CDTThunderstorm Wind 0Tangipahoa, 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

Boothville, LA (KBVE), launched 12:00Z, 4.2 hours before the alert went out and 174 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.

Skew-T log-pSkew-T log-p diagram, Boothville, LA at 12:00Z on 1988-05-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 385 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Boothville, LA at 12:00Z on 1988-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
385 J/kg
Mixed-layer CIN
-208 J/kg
Mixed-layer LCL
964 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNEW 211612
TORNEW
LAC105-211700-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1110 AM CDT SAT MAY 21 1988
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL NOON CDT
FOR PEOPLE IN THE FOLLOWING PARISH...
 
IN SOUTHEAST LOUISIANA
          ...TANGIPAHOA
 
AT 1108 AM CDT A TORNADO WAS REPORTED ON THE GROUND JUST WEST OF
HAMMOND AT STATE SCHOOL ON HIGHWAY 190. REPORT WAS RECEIVED THROUGH
THE POLICE.
 
THUNDERSTORMS IN THE AREA ARE MOVING TO THE NORTHEAST.
 
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...SEEGK 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 21, 8:23 AM CDT, 2 hours 47 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
825 AM CDT SAT MAY 21 1988

...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL 11 AM FOR
ST. LANDRY PARISH IN EAST CENTRAL LOUISIANA...

RADAR SHOWED STRONG THUNDERSTORMS WITH VERY HEAVY RAIN FROM THE SOUTH
PART OF IBERVILLE PARISH NORTHWEST TO NORTH OF OPELOUSAS IN ST. LANDRY
PARISH.  ANOTHER BAND OF STRONG THUNDERSTORMS WAS LOCATED FROM NEAR
LAFAYETTE SOUTHWEST TO THE COASTAL WATERS SOUTH OF CROWLEY.  MOVEMENT
WAS NORTHEAST AT 25 MPH.

THESE THUNDERSTORMS WILL BE MOVING INTO POINTE COUPEE AND IBERVILLE
AND CONTINUING IN ST. LANDRY PARISH DURING THE NEXT COUPLE OF HOURS.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS sCONDITIONS ARE FAVORABLE
FOR SEVERE THUNDERSTORMS 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 21, 9:48 AM CDT, 1 hour 22 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW ORLEANS LA
945 AM CDT SAT MAY 21 1988

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR ALL OF SOUTHEAST
   LOUISIANA UNTIL 2 PM CDT...

CLUSTERS OF STRONG THUNDERSTORMS WERE OCCURRING BETWEEN ALEXANDRIA
AND HAMMOND EXTENDING SOUTH TO BETWEEN OPELOUSAS AND MORGAN CITY
AND CONTINUING SOUTH INTO THE COASTAL WATERS. THE HEAVIEST ACTIVITY
EXTENDED FROM SIMMESPORTS TO NEW IBERIA...AND JUST SOUTH OF BATON
ROUGE.

MOVEMENT WAS NORTH AT 30 MILES AN HOUR.

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 21, 9:31 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge44 min
May 21, 10:29 AM CDTSevere Thunderstorm WarningLIXTangipahoa46 min
May 21, 11:16 AM CDTTornado WarningLIXSaint Tammany44 min
May 21, 11:30 AM CDTSevere Thunderstorm WarningLIXLafourche, Saint Charles, Terrebonne60 min
May 21, 11:55 AM CDTSevere Thunderstorm WarningLIXOrleans, Plaquemines, Saint Bernard2 hr
May 21, 11:55 AM CDTSevere Thunderstorm WarningLIXSaint Tammany, Washington2 hr
May 21, 11:55 AM CDTSevere Thunderstorm WarningLIXJefferson2 hr

Nearby

Tornado Warnings in Louisiana, 1988Every tornado warning in 1988Tornadoes in 1988

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.