Alert archive / Louisiana / Tornado Warnings in 2002

Tornado Warning 9, NWS New Orleans, LA

April 8, 2002Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 8, 2002, 1:55 PM CDT for Terrebonne Parish, Louisiana. It was in force for 110 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 8, 2002, 1:55 PM CDT (18:55 UTC)
Expired: Apr 8, 2002, 3:45 PM CDT
In force: 110 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

County Terrebonne Parish, LA

What was reported inside it

Time	Report	Where	Remark
Apr 8, 2:00 PM CDT	Thunderstorm Wind	Thibodaux, LA	Large tree limbs were 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
Apr 8, 12:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.9 hours before the alert went out and 115 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: 896 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 532 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 247 m²/s²
0-3 km storm-relative helicity: 454 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KLIX 081855
TORNEW
LAC057-109-081930-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
155 PM CDT MON APR 8 2002

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  LAFOURCHE PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF THIBODAUX
  TERREBONNE PARISH IN SOUTHEAST LOUISIANA

* UNTIL 230 PM CDT

* AT 150 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER SCHRIEVER...OR
  ABOUT 8 MILES SOUTH OF THIBODAUX...MOVING NORTHEAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
   THIBODAUX AT 200 PM CDT

SEEK SHELTER ON THE LOWEST FLOOR OF A BUILDING IN AN INTERIOR HALLWAY
OR ROOM SUCH AS A CLOSET OR BATHROOM.

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

LAT...LON 2958 9083 2970 9095 2991 9075 2989 9059
          2982 9052

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 5:42 AM CDT	Severe Thunderstorm Warning	LIX	East Feliciana	48 min
Apr 8, 12:04 PM CDT	Severe Thunderstorm Warning	LIX	Livingston, Saint Helena, Tangipahoa	26 min
Apr 8, 12:35 PM CDT	Tornado Warning	LIX	Livingston, Tangipahoa	55 min
Apr 8, 1:07 PM CDT	Tornado Warning	LIX	Ascension, Saint James, Saint John the Baptist	38 min
Apr 8, 1:13 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa, Washington	62 min
Apr 8, 1:19 PM CDT	Tornado Warning	LIX	Saint Tammany, Tangipahoa	26 min
Apr 8, 1:37 PM CDT	Special Marine Warning	LIX		113 min
Apr 8, 1:37 PM CDT	Special Marine Warning	LIX		113 min
Apr 8, 1:45 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne	45 min
Apr 8, 1:47 PM CDT	Tornado Warning	LIX	Washington	43 min
Apr 8, 1:55 PM CDT	Tornado Warning	LIX	Lafourche	95 min
Apr 8, 2:19 PM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany	56 min
Apr 8, 2:31 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard, Saint Charles and 1 more	89 min
Apr 8, 2:35 PM CDT	Special Marine Warning	LIX		115 min
Apr 8, 3:07 PM CDT	Tornado Warning	LIX	Lafourche	23 min
Apr 8, 3:11 PM CDT	Tornado Warning	LIX	Jefferson, Plaquemines	49 min
Apr 8, 3:14 PM CDT	Special Marine Warning	LIX		2 hr
Apr 8, 3:40 PM CDT	Tornado Warning	LIX	Jefferson, Lafourche, Plaquemines	2 hr
Apr 8, 4:53 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson	22 min
Apr 8, 5:38 PM CDT	Tornado Warning	LIX	Plaquemines	90 days
Apr 8, 5:42 PM CDT	Special Marine Warning	LIX		2 hr
Apr 8, 5:42 PM CDT	Special Marine Warning	LIX		2 hr

Nearby

Tornado Warnings in Louisiana, 2002 Every tornado warning in 2002 Tornadoes 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.