Alert archive / Louisiana / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 49, NWS New Orleans, LA

April 5, 2003Livingston Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 5, 2003, 11:32 AM CST for Livingston Parish, Tangipahoa 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: Apr 5, 2003, 11:32 AM CST (17:32 UTC)
Expired: Apr 5, 2003, 12:30 PM CST
In force: 58 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Livingston Parish, LA, Tangipahoa Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.5 hours before the alert went out and 82 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: 577 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 787 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

217 
WUUS54 KLIX 051732
SVRNEW
LAC063-105-051830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1129 AM CST SAT APR 5 2003

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LIVINGSTON PARISH IN SOUTHEAST LOUISIANA
  TANGIPAHOA PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITIES OF...HAMMOND...AMITE

* UNTIL 1230 PM CST

* AT 1124 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  CLUSTER OF SEVERE THUNDERSTORMS FROM NEAR 10 MILES NORTH OF HOLDEN
  TO SPRINGFIELD AND LAKE MAUREPAS...MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
   PONCHATOULA...HAMMOND AROUND 1140 AM CST
   INDEPENDENCE AT 1140 AM CST
   AMITE AT 1150 AM CST
   ROBERT AT 1200 PM CST

THIS IS A DANGEROUS STORM WITH DAMAGING WINDS...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 3029 9044 3065 9080 3065 9057 3074 9055
          3081 9032 3041 9028

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 5, 10:18 AM CST	Severe Thunderstorm Warning	LIX	East Feliciana	42 min
Apr 5, 10:45 AM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston, Saint Helena	60 min
Apr 5, 11:24 AM CST	Special Marine Warning	LIX		66 min
Apr 5, 1:21 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	24 min
Apr 5, 1:41 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	49 min
Apr 5, 1:48 PM CST	Special Marine Warning	LIX		57 min
Apr 5, 2:43 PM CST	Special Marine Warning	LIX		92 min
Apr 5, 2:43 PM CST	Special Marine Warning	LIX		92 min
Apr 5, 4:10 PM CST	Special Marine Warning	LIX		65 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.