Alert archive / Louisiana / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 21, NWS New Orleans, LA

March 12, 2003Livingston Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 12, 2003, 4:17 PM CST for Livingston Parish, Louisiana. It was in force for 58 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, 4:17 PM CST (22:17 UTC)
Expired: Mar 12, 2003, 5:15 PM CST
In force: 58 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

County Livingston Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.3 hours before the alert went out and 96 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: 251 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 643 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

168 
WUUS54 KLIX 122217
SVRNEW
LAC063-122315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
416 PM CST WED MAR 12 2003

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LIVINGSTON PARISH IN SOUTHEAST LOUISIANA

* UNTIL 515 PM CST

* AT 408 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER LIVINGSTON...OR ABOUT 14 MILES WEST OF
  HAMMOND...MOVING NORTHEAST AT 15 MPH.

THIS IS A DANGEROUS STORM WITH LARGE HAIL AND CONTINUOUS LIGHTNING...STAY 
INDOORS AWAY FROM WINDOWS.

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

LAT...LON 3039 9066 3049 9079 3065 9069 3065 9057
          3047 9055

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 1:19 PM CST	Special Marine Warning	LIX		116 min
Mar 12, 2:13 PM CST	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	47 min
Mar 12, 2:29 PM CST	Special Marine Warning	LIX		61 min
Mar 12, 3:13 PM CST	Special Marine Warning	LIX		2 hr
Mar 12, 3:28 PM CST	Severe Thunderstorm Warning	LIX	Saint James	47 min
Mar 12, 3:35 PM CST	Special Marine Warning	LIX		40 min
Mar 12, 4:33 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	57 min
Mar 12, 5:08 PM CST	Special Marine Warning	LIX		2 hr
Mar 12, 5:24 PM CST	Flash Flood Warning	LIX	Saint Bernard	2 hr
Mar 12, 5:35 PM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	55 min
Mar 12, 5:45 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	60 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2003 Every severe thunderstorm warning 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.