Alert archive / Louisiana / Tornado Warnings in 1999

Tornado Warning 17, NWS New Orleans, LA

January 29, 1999Washington Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Jan 29, 1999, 5:16 PM CST for Washington Parish, Louisiana. It was in force for 64 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
Jan 29, 1999, 5:16 PM CST (23:16 UTC)
Expired
Jan 29, 1999, 6:20 PM CST
In force
64 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.3 hours before the alert went out and 75 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 1999-01-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 664 joules per kilogram.LCLLFCEL10008507005003002001001 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 1999-01-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.193958Sfc1 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
664 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
486 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 292315 RRA
TORNEW
LAC117-300015-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
516 PM CST FRI JAN 29 1999

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

* TORNADO WARNING FOR
   - SOUTHERN WASHINGTON PARISH IN SOUTHEASTERN LOUISIANA

* UNTIL 620 PM CST

* AT 508 PM CST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CONTAINING A POSSIBLE TORNADO 20 MILES SOUTHWEST OF BOGALUSA
  MOVING NORTHEAST AT 25 MPH.

* SOME LOCATIONS IN AND NEAR THE PATH OF THIS STORM ARE...
  BOGALUSA AT 539 PM CST


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.

IssuedProductOfficeCountiesLasted
Jan 29, 2:05 PM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, West Baton Rouge45 min
Jan 29, 2:54 PM CSTTornado WarningLIXEast Baton Rouge, Livingston36 min
Jan 29, 4:51 PM CSTTornado WarningLIXSaint Tammany34 min

Nearby

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