Alert archive / Louisiana / Tornado Warnings in 2003

Tornado Warning 6, NWS New Orleans, LA

March 12, 2003Saint Helena Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Mar 12, 2003, 9:12 PM CST for Saint Helena Parish, Washington Parish, Louisiana. It was in force for 63 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: Mar 12, 2003, 9:12 PM CST (03:12 UTC)
Expired: Mar 12, 2003, 10:15 PM CST
In force: 63 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Saint Helena Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.2 hours before the alert went out and 112 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 595 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 667 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KLIX 130312 CCA
TORNEW
LAC091-117-130415-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTED
NATIONAL WEATHER SERVICE NEW ORLEANS LA
908 PM CST WED MAR 12 2003

CORRECTED TO REMOVE WASHINGTON PARISH FROM WARNING.

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  ST. HELENA PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF GREENSBURG
  
* UNTIL 1015 PM CST

* AT 902 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER DARLINGTON...OR
  ABOUT 6 MILES NORTHWEST OF GREENSBURG...MOVING SOUTHEAST AT 15 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 3069 9057 3081 9083 3097 9078 3093 9057

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 7:15 PM CST	Special Marine Warning	LIX		2 hr
Mar 12, 7:43 PM CST	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	62 min
Mar 12, 8:49 PM CST	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena	56 min
Mar 12, 9:08 PM CST	Tornado Warning	LIX	Saint Helena, Washington	67 min
Mar 12, 9:26 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	64 min
Mar 12, 10:06 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	59 min
Mar 13, 1:04 AM CST	Special Marine Warning	LIX		71 min
Mar 13, 1:10 AM CST	Special Marine Warning	LIX		65 min
Mar 13, 11:31 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	59 min
Mar 13, 12:16 PM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Saint Helena, Tangipahoa	59 min
Mar 13, 12:59 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	46 min
Mar 13, 1:15 PM CST	Severe Thunderstorm Warning	LIX	Livingston, Tangipahoa	45 min
Mar 13, 1:48 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa	42 min
Mar 13, 1:50 PM CST	Special Marine Warning	LIX		115 min
Mar 13, 1:50 PM CST	Special Marine Warning	LIX		115 min
Mar 13, 2:29 PM CST	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Saint Tammany	61 min
Mar 13, 2:58 PM CST	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	62 min
Mar 13, 3:43 PM CST	Special Marine Warning	LIX		2 hr
Mar 13, 4:09 PM CST	Special Marine Warning	LIX		96 min

Nearby

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