Alert archive / Louisiana / Tornado Warnings in 2005

Tornado Warning 99, NWS New Orleans, LA

September 23, 2005Assumption Parish, Lafourche Parish, Saint James Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Sep 23, 2005, 10:39 AM CDT for Assumption Parish, Lafourche Parish, Saint James Parish, Louisiana. It was in force for 36 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: Sep 23, 2005, 10:39 AM CDT (15:39 UTC)
Expired: Sep 23, 2005, 11:15 AM CDT
In force: 36 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Assumption Parish, LA, Lafourche Parish, LA, Saint James 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
Sep 23, 9:55 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 3.7 hours before the alert went out and 121 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: 377 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 298 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KLIX 231541
TORLIX
LAC007-057-093-231615-
/O.NEW.KLIX.TO.W.0099.050923T1539Z-050923T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1039 AM CDT FRI SEP 23 2005

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  ASSUMPTION PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF NAPOLEONVILLE
  LAFOURCHE PARISH IN SOUTHEAST LOUISIANA
  ST. JAMES PARISH IN SOUTHEAST LOUISIANA

* UNTIL 1115 AM CDT

* AT 1035 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 21 MILES EAST OF
  NAPOLEONVILLE...OR ABOUT 8 MILES NORTHEAST OF THIBODAUX...MOVING
  WEST AT 50 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  NAPOLEONVILLE BY 1055 AM CDT
  PAINCOURTVILLE BY 1100 AM CDT
  PIERRE PART BY 1105 AM CDT

SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR
HALLWAY OR ROOM SUCH AS A CLOSET. STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CDT FRIDAY EVENING FOR
SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 2991 9121 3000 9125 3005 9116 3008 9103
      2994 9068 2990 9067 2989 9062 2988 9062
      2975 9068 2975 9070

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 23, 9:52 AM CDT	Flash Flood Warning	LIX	Orleans, Saint Bernard	6 hr
Sep 23, 10:00 AM CDT	Tornado Warning	LIX	Ascension, Saint Charles, Saint James, Saint John the Baptist	30 min
Sep 23, 10:34 AM CDT	Tornado Warning	LIX	Ascension, Iberville, Saint James	26 min
Sep 23, 10:44 AM CDT	Tornado Warning	LIX	Saint Charles, Saint James, Saint John the Baptist	31 min
Sep 23, 11:11 AM CDT	Tornado Warning	LIX	Orleans	19 min
Sep 23, 11:17 AM CDT	Tornado Warning	LIX	Terrebonne	28 min
Sep 23, 11:54 AM CDT	Tornado Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Saint John the Baptist	36 min
Sep 23, 1:00 PM CDT	Tornado Warning	LIX	Jefferson, Orleans, Plaquemines, Saint Charles	30 min
Sep 23, 1:24 PM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston	36 min
Sep 23, 1:26 PM CDT	Tornado Warning	LIX	Ascension, Livingston	34 min
Sep 23, 2:09 PM CDT	Tornado Warning	LIX	Assumption, Lafourche, Saint James, Terrebonne	36 min
Sep 23, 2:21 PM CDT	Tornado Warning	LIX	Saint Tammany	24 min
Sep 23, 3:33 PM CDT	Tornado Warning	LIX	Lafourche, Saint James	27 min
Sep 23, 4:42 PM CDT	Tornado Warning	LIX	Livingston, Tangipahoa	33 min
Sep 23, 5:14 PM CDT	Tornado Warning	LIX	Livingston, Tangipahoa	31 min

Nearby

Tornado Warnings in Louisiana, 2005 Every tornado warning in 2005 Tornadoes in 2005

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.