Alert archive / Louisiana / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 113, NWS New Orleans, LA

October 29, 20024 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Oct 29, 2002, 4:46 AM CST for 4 parishes in Louisiana. It was in force for 44 min. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Oct 29, 2002, 4:46 AM CST (10:46 UTC)
Expired: Oct 29, 2002, 5:30 AM CST
In force: 44 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Livingston Parish, LA, Saint Helena Parish, LA

What was reported inside it

Time	Report	Where	Remark
Oct 29, 4:50 AM CST	Thunderstorm Wind	Countywide, LA	Several trees and power lines were knocked down across various areas of the parish.
Oct 29, 5:00 AM CST	Thunderstorm Wind	Denham Spgs, LA	A large commercial sign was bent and damaged by thunderstorms winds.
Oct 29, 5:30 AM CST	Thunderstorm Wind	Killian, LA	A large tree was blown down.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Oct 29, 1:25 AM CST	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 10.8 hours before the alert went out and 123 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: 1078 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

189 
WUUS54 KLIX 291046
SVRNEW
LAC033-037-063-091-291130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
443 AM CST TUE OCT 29 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST BATON ROUGE PARISH IN SOUTHEAST LOUISIANA
  EAST FELICIANA PARISH IN SOUTHEAST LOUISIANA
  LIVINGSTON PARISH IN SOUTHEAST LOUISIANA
  ST. HELENA PARISH IN SOUTHEAST LOUISIANA
  
* UNTIL 530 AM CST

* AT 441 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  CLUSTER OF SEVERE THUNDERSTORMS OVER SOUTHEAST PORTIONS OF EAST    
  FELICIANA PARISH AND ANOTHER OVER SOUTHERN PORTIONS OF EAST BATON  
  ROUGE PARISH...MOVING EAST AT 40 MPH. 

THESE ARE DANGEROUS STORMS 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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 29, 3:41 AM CST	Tornado Warning	LIX	Pointe Coupee	56 days
Oct 29, 4:11 AM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, Iberville, West Baton Rouge	34 min
Oct 29, 5:04 AM CST	Severe Thunderstorm Warning	LIX	Ascension	26 min
Oct 29, 5:31 AM CST	Severe Thunderstorm Warning	LIX	Ascension, Livingston, Tangipahoa	44 min
Oct 29, 5:46 AM CST	Tornado Warning	LIX	Tangipahoa	56 days
Oct 29, 5:51 AM CST	Special Marine Warning	LIX		84 min
Oct 29, 5:58 AM CST	Tornado Warning	LIX	Saint Tammany	56 days
Oct 29, 6:26 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	49 min
Oct 29, 7:39 AM CST	Special Marine Warning	LIX		96 min
Oct 29, 8:45 AM CST	Special Marine Warning	LIX		2 hr
Oct 29, 8:45 AM CST	Special Marine Warning	LIX		2 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.