Alert archive / Louisiana / Tornado Warnings in 2002

Tornado Warning 40, NWS New Orleans, LA

October 3, 2002Assumption Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Oct 3, 2002, 9:50 AM CDT for Assumption Parish, Louisiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 3, 2002, 9:50 AM CDT (14:50 UTC)
Expired
Oct 3, 2002, 12:45 PM CDT
In force
3 hr
Issued by
NWS New Orleans, LA
Area
Counties, with a storm outline in the text

County Assumption Parish, LA

The watch it was issued in

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

IssuedProductOfficeLasted
Oct 2, 9:25 PM CDTTornado WatchSPC13 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 2.8 hours before the alert went out and 36 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 2002-10-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 855 joules per kilogram.LCLEL10008507005003002001001 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 2002-10-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 305 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
855 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
511 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
305 m²/s²
0-3 km storm-relative helicity
407 m²/s²
Significant tornado parameter
1.1
Supercell composite
8.4

Open this sounding in Storm Lab

The text

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

054 
WFUS54 KLIX 031450
TORNEW
LAC007-031515-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
950 AM CDT THU OCT 3 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  ASSUMPTION PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF NAPOLEONVILLE

* UNTIL 1015 AM CDT

* AT 940 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES SOUTH OF
  NAPOLEONVILLE...MOVING NORTH AT 10 MPH.

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 2987 9092 2975 9103 3000 9122 3009 9097

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 2, 9:37 PM CDTTornado WarningLIXTerrebonne13 hr
Oct 3, 1:02 AM CDTTornado WarningLIXJefferson28 min
Oct 3, 4:06 AM CDTTornado WarningLIXJefferson, Saint Charles7 hr
Oct 3, 4:29 AM CDTTornado WarningLIXJefferson, Orleans, Saint Charles7 hr
Oct 3, 4:29 AM CDTTornado WarningLIXSaint Charles8 hr
Oct 3, 6:29 AM CDTFlash Flood WarningLIXSaint Tammany4 hr
Oct 3, 8:20 AM CDTTornado WarningLIXSaint Tammany, Washington4 hr
Oct 3, 10:46 AM CDTTornado WarningLIXLivingston, Tangipahoa29 min
Oct 3, 10:56 AM CDTTornado WarningLIXSaint Tammany34 min
Oct 3, 10:56 AM CDTTornado WarningLIXSaint Tammany, Washington6 days
Oct 3, 11:09 AM CDTTornado WarningLIXEast Feliciana22 days
Oct 3, 11:09 AM CDTTornado WarningLIXEast Feliciana, Saint Helena22 days

Nearby

Tornado Warnings in Louisiana, 2002Every tornado warning in 2002Tornadoes in 2002

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.