Alert archive / Louisiana / Tornado Warnings in 1998

Tornado Warning 1, NWS New Orleans, LA

January 7, 1998Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Jan 7, 1998, 1:31 AM CST for Saint Tammany Parish, Louisiana. It was in force for 19 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
Jan 7, 1998, 1:31 AM CST (07:31 UTC)
Expired
Jan 7, 1998, 1:50 AM CST
In force
19 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Saint Tammany Parish, LA

What was reported inside it

TimeReportWhereRemark
Jan 7, 1:45 AM CSTTornado F0Slidell, LAA tornado touched down briefly in the Ozone Woods subdivision snapping trees and downing power lines.

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.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 7.5 hours before the alert went out and 30 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, Slidell Radar S, LA at 00:00Z on 1998-01-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 1998-01-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.19395878Sfc1 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
4 J/kg
Mixed-layer CIN
-252 J/kg
Mixed-layer LCL
768 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
407 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

922 
WFUS1 KNEW 070732 RRA
TORNEW
LAC103-070750-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
131 AM CST WED JAN 7 1998

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL 150 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEASTERN LOUISIANA

   ...ST TAMMANY PARISH

AT 115 AM CST...DOPPLER RADAR IN SLIDELL INDICATED A POSSIBLE
TORNADO NEAR THE NORTH SHORE OF LAKE PONTCHARTRAIN...APPROACHING
LACOMBE. MOVEMENT WAS NORTHEAST AT 40 MILES AN HOUR.

THIS STORM WILL MOVE ACROSS INTERSTATE 12 AROUND 145 AM.

IF YOU ARE IN THE PATH OF A TORNADO...GET UNDER A WORKBENCH OR PIECE
OF STURDY FURNITURE. 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 6, 8:32 PM CSTFlash Flood WarningLIXAscension, East Baton Rouge, Livingston4 hr
Jan 6, 8:32 PM CSTFlash Flood WarningLIXAssumption, Saint James4 hr
Jan 6, 8:32 PM CSTFlash Flood WarningLIXIberville, West Baton Rouge4 hr
Jan 6, 9:57 PM CSTFlash Flood WarningLIXEast Feliciana, Pointe Coupee, West Feliciana4 hr
Jan 6, 9:57 PM CSTFlash Flood WarningLIXSaint Helena, Tangipahoa4 hr
Jan 6, 11:19 PM CSTFlash Flood WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard4 hr
Jan 6, 11:19 PM CSTFlash Flood WarningLIXLafourche, Saint Charles, Saint John the Baptist, Terrebonne4 hr
Jan 7, 1:13 AM CSTSevere Thunderstorm WarningLIXSaint Tammany32 min
Jan 7, 1:42 AM CSTFlash Flood WarningLIXSaint Tammany3 hr
Jan 7, 5:09 AM CSTFlash Flood WarningLIXSaint Tammany116 min

Nearby

Tornado Warnings in Louisiana, 1998Every tornado warning in 1998Tornadoes in 1998

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.