Alert archive / Louisiana / Tornado Warnings in 1999

Tornado Warning 26, NWS New Orleans, LA

March 13, 1999Pointe Coupee Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Mar 13, 1999, 8:50 AM CST for Pointe Coupee Parish, Louisiana. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 13, 1999, 8:50 AM CST (14:50 UTC)
Expired: Mar 13, 1999, 9:20 AM CST
In force: 30 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Pointe Coupee Parish, LA

The watch it was issued in

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

Issued	Product	Office	Lasted
Mar 13, 5:00 AM CST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.8 hours before the alert went out and 167 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: 759 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 639 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 311 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.8

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 131448 RRA
TORNEW
LAC077-131520-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
850 AM CST SAT MAR 13 1999

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A...

* TORNADO WARNING FOR
   - NORTHERN AND CENTRAL POINTE COUPEE PARISH IN SOUTHEASTERN
  LOUISIANA

* UNTIL 920 AM CST

* AT 849 AM CST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING TORNADO 5 MILES SOUTHWEST OF BATCHELOR
  MOVING NORTHEAST AT 35 MILES AN HOUR.

* THE THUNDERSTORM IS EXPECTED TO BE BETWEEN MORGANZA AND
  BATCHELOR FROM 855 TO 905 AM CST.

IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM
AWAY FROM WINDOWS

IF YOU ARE IN THE PATH OF A TORNADO...GET UNDER A WORKBENCH OR PIECE
OF STURDY FURNITURE. SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A
CLOSET ON THE LOWEST FLOOR.  USE BLANKETS...PILLOWS...OR CUSHIONS TO
COVER YOUR BODY.  AVOID WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 13, 8:29 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee	46 min
Mar 13, 9:00 AM CST	Severe Thunderstorm Warning	LIX	West Feliciana	35 min
Mar 13, 9:38 AM CST	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	32 min
Mar 13, 10:07 AM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana	48 min
Mar 13, 10:23 AM CST	Severe Thunderstorm Warning	LIX	Saint Helena	42 min
Mar 13, 11:01 AM CST	Severe Thunderstorm Warning	LIX	Tangipahoa	34 min
Mar 13, 1:07 PM CST	Tornado Warning	LIX	Tangipahoa	33 min
Mar 13, 1:33 PM CST	Tornado Warning	LIX	Washington	32 min
Mar 13, 3:46 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	34 min
Mar 13, 4:33 PM CST	Severe Thunderstorm Warning	LIX	Jefferson	32 min
Mar 13, 5:40 PM CST	Severe Thunderstorm Warning	LIX	Plaquemines	30 min

Nearby

Tornado Warnings in Louisiana, 1999 Every tornado warning in 1999 Tornadoes in 1999

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.