Alert archive / Louisiana / Tornado Warnings in 2003

Tornado Warning 45, NWS New Orleans, LA

November 18, 2003Jefferson Parish, Orleans Parish, Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Nov 18, 2003, 9:24 AM CST for Jefferson Parish, Orleans Parish, Saint Bernard Parish, Louisiana. It was in force for 21 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, 9:24 AM CST (15:24 UTC)
Expired
Nov 18, 2003, 9:45 AM CST
In force
21 min
Issued by
NWS New Orleans, LA
Area
Counties, with a storm outline in the text

Counties Jefferson Parish, LA, Orleans Parish, LA, Saint Bernard Parish, LA

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, 3.4 hours before the alert went out and 44 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 181524
TORNEW
LAC051-071-087-181545-

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

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  JEFFERSON PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITIES OF...METAIRIE...KENNER
  ORLEANS PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITIES OF...NEW ORLEANS...EAST NEW ORLEANS
  ST. BERNARD PARISH IN SOUTHEAST LOUISIANA

* UNTIL 945 AM CST

* AT 919 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO BETWEEN KENNER AND 
AVONDALE...MOVING EAST AT 30 MPH. STATE POLICE TROOP B INDICATED 
POSSIBLE TORNADO DEVELOPING NEAR AVONDALE.

* THE TORNADO IS EXPECTED TO BE NEAR...
   METAIRIE AT 925 AM CST
   NEW ORLEANS AT 935 AM CST
   EAST NEW ORLEANS AT 945 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 3004 9027 2989 9024 3000 8979 3021 8988

$$

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, 9:29 AM CSTTornado WarningLIXSaint Tammany, Washington46 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

Nearby

Tornado Warnings in Louisiana, 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.