Alert archive / Louisiana / Tornado Warnings in 2003

Tornado Warning 46, NWS New Orleans, LA

November 18, 2003Saint Tammany Parish, Washington Parish, Louisiana; Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Nov 18, 2003, 9:29 AM CST for Saint Tammany Parish, Washington Parish, Louisiana; Pearl River County, Mississippi. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Nov 18, 2003, 9:29 AM CST (15:29 UTC)
Expired
Nov 18, 2003, 10:15 AM CST
In force
46 min
Issued by
NWS New Orleans, LA
Area
Counties, with a storm outline in the text

Counties Saint Tammany Parish, LA, Washington Parish, LA, Pearl River County, MS

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Nov 18, 6:55 AM CSTTornado WatchSPC5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.5 hours before the alert went out and 60 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 12:00Z on 2003-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 309 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, Slidell Radar S, LA at 12:00Z on 2003-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 273 square meters per square second.1939587897Sfc1 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
309 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
620 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
273 m²/s²
0-3 km storm-relative helicity
352 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KLIX 181529
TORNEW
LAC103-117-MSC109-181615-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
928 AM CST TUE NOV 18 2003

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  ST. TAMMANY PARISH IN SOUTHEAST LOUISIANA
  WASHINGTON PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF BOGALUSA
  PEARL RIVER COUNTY IN SOUTHERN MISSISSIPPI
  THIS INCLUDES THE CITY OF POPLARVILLE

* UNTIL 1015 AM CST

* AT 925 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO ABOUT 10 MILES 
SOUTHWEST OF BOGALUSA...MOVING EAST AT 20   MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   SUN...BUSH...BOGALUSA AT 940 AM CST
   CROSSROADS AT 955 AM CST
   MCNEIL AT 1015 AM CST

SEEK SHELTER ON THE LOWEST FLOOR OF A BUILDING IN AN INTERIOR HALLWAY
OR ROOM SUCH AS A CLOSET OR BATHROOM.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE.

LAT...LON 3091 9006 3063 9011 3055 8958 3084 8952

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 18, 7:05 AM CSTSevere Thunderstorm WarningLIXSaint Helena40 min
Nov 18, 7:18 AM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, Iberville, Livingston42 min
Nov 18, 7:25 AM CSTSevere Thunderstorm WarningLIXAscension, Assumption35 min
Nov 18, 7:45 AM CSTSevere Thunderstorm WarningLIXLivingston, Saint Helena, Tangipahoa, Washington45 min
Nov 18, 7:55 AM CSTSevere Thunderstorm WarningLIXAscension, Assumption, Iberville, Lafourche, Saint James, Terrebonne50 min
Nov 18, 8:07 AM CSTSpecial Marine WarningLIX83 min
Nov 18, 8:21 AM CSTSpecial Marine WarningLIX99 min
Nov 18, 8:29 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa, Washington46 min
Nov 18, 8:39 AM CSTSevere Thunderstorm WarningLIXLafourche, Livingston, Saint Charles, Saint James, Saint John the Baptist, Terrebonne51 min
Nov 18, 9:08 AM CSTSevere Thunderstorm WarningLIXJefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more52 min
Nov 18, 9:10 AM CSTSevere Thunderstorm WarningLIXSaint Tammany, Tangipahoa, Washington65 min
Nov 18, 9:24 AM CSTTornado WarningLIXJefferson, Orleans, Saint Bernard21 min
Nov 18, 9:32 AM CSTTornado WarningLIXSaint Tammany43 min
Nov 18, 9:41 AM CSTTornado WarningLIXOrleans, Saint Bernard34 min
Nov 18, 9:55 AM CSTSpecial Marine WarningLIX2 hr
Nov 18, 10:11 AM CSTSevere Thunderstorm WarningLIXSaint Tammany49 min
Nov 18, 10:23 AM CSTSpecial Marine WarningLIX97 min
Nov 18, 10:46 AM CSTSevere Thunderstorm WarningLIXPlaquemines44 min
Nov 18, 11:50 AM CSTSpecial Marine WarningLIX115 min
Nov 18, 12:00 PM CSTSpecial Marine WarningLIX60 min
Nov 18, 5:16 AM CSTSevere Thunderstorm WarningLIXWilkinson44 min
Nov 18, 6:03 AM CSTSevere Thunderstorm WarningLIXAmite, Wilkinson42 min
Nov 18, 10:52 AM CSTTornado WarningLIXHancock, Harrison23 min
Nov 18, 11:14 AM CSTSevere Thunderstorm WarningLIXHarrison, Jackson61 min
Nov 18, 12:13 PM CSTSevere Thunderstorm WarningLIXJackson47 min

Nearby

Tornado Warnings in Louisiana, 2003Tornado Warnings in Mississippi, 2003Every tornado warning in 2003Tornadoes in 2003

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.