Alert archive / Louisiana / Tornado Warnings in 2011

Tornado Warning 9, NWS New Orleans, LA

March 5, 2011Jefferson Parish, Plaquemines Parish, Saint Bernard Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Mar 5, 2011, 1:26 PM CST for Jefferson Parish, Plaquemines Parish, Saint Bernard Parish, Louisiana. It was in force for 34 min. 4 reports 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: Mar 5, 2011, 1:26 PM CST (19:26 UTC)
Expired: Mar 5, 2011, 2:00 PM CST
In force: 34 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon

Counties Jefferson Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA

What was reported inside it

Time	Report	Where	Remark
Mar 5, 1:29 PM CST	TSTM WND DMG	1 Nnw Marrero, LA	EMERGENCY MANAGER REPORTED DAMAGE AT THE CORNER OF AMES AND FOURTH. POWER LINES DOWN...ROOF DAMAGE TO A BUSINESS WITH DEBRIS THROWN ABOUT AND STANDING WATER ON STREETS IN THE AREA. BETWEEN 4TH AND HIGHWAY 90 ON GARDEN ROAD WOODEN STRUCTURE DAMAGED...TELEPHONE
Mar 5, 1:29 PM CST	TSTM WND DMG	Marrero, LA	EMERGENCY MANAGER REPORTED DAMAGE AT THE CORNER OF AMES AND FOURTH. POWER LINES DOWN...ROOF DAMAGE TO A BUSINESS WITH DEBRIS THROWN ABOUT AND STANDING WATER ON STREETS IN THE AREA. BETWEEN 4TH AND HIGHWAY 90 ON GARDEN ROAD WOODEN STRUCTURE DAMAGED...TELEPHONE
Mar 5, 1:30 PM CST	TSTM WND DMG	Terrytown, LA	PUBLIC REPORTED MINOR STREET FLOODING...WIND GUSTS ESTIMATED NEAR 55 MILES PER HOUR AND SMALL TREE LIMBS DOWN IN THE TERRYTOWN AREA.
Mar 5, 1:40 PM CST	TSTM WND DMG	Marrero, LA	EMERGENCY MANAGER REPORTED POWER LINES DOWN IN THE VICINITY OF AMES BLVD. AND FOURTH STREET.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 5, 8:54 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 50 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: 960 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 451 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 264 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

253 
WFUS54 KLIX 051926
TORLIX
LAC051-075-087-052000-
/O.NEW.KLIX.TO.W.0009.110305T1926Z-110305T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
126 PM CST SAT MAR 5 2011

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN JEFFERSON PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITIES OF...TIMBERLANE...MARRERO...HARVEY...
  NORTHWESTERN PLAQUEMINES PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF BELLE CHASSE...
  WEST CENTRAL ST. BERNARD PARISH IN SOUTHEAST LOUISIANA...
  THIS INCLUDES THE CITY OF CHALMETTE...

* UNTIL 200 PM CST

* AT 123 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES
  SOUTHWEST OF WESTWEGO...OR 7 MILES SOUTH OF AVONDALE...MOVING EAST
  AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  MARRERO AND WESTWEGO BY 135 PM CST...
  HARVEY AND GRETNA BY 140 PM CST...
  BELLE CHASSE...TIMBERLANE AND TERRYTOWN BY 145 PM CST...
  7 MILES SOUTH OF CHALMETTE BY 150 PM CST...
  VIOLET BY 155 PM CST...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THE SAFEST PLACE TO BE DURING A TORNADO IS UNDER A WORKBENCH OR OTHER
PIECE OF STURDY FURNITURE. SEEK SHELTER ON THE LOWEST FLOOR OF THE
BUILDING IN AN INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND ALWAYS 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 400 PM CST SATURDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

&&

LAT...LON 2975 9015 2983 9016 2988 9024 2993 9013
      2992 9008 2994 9005 2989 8998 2991 8996
      2988 8991 2991 8990 2993 8992 2995 8999
      2998 8983 2995 8979 2979 8978
TIME...MOT...LOC 1926Z 261DEG 32KT 2982 9020

$$


24/RR

1 follow-up statement

036 
WWUS54 KLIX 051953
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
153 PM CST SAT MAR 5 2011

LAC051-075-087-052003-
/O.EXP.KLIX.TO.W.0009.000000T0000Z-110305T2000Z/
ST. BERNARD LA-JEFFERSON LA-PLAQUEMINES LA-
153 PM CST SAT MAR 5 2011

...THE TORNADO WARNING FOR NORTHWESTERN PLAQUEMINES...NORTHERN
JEFFERSON AND WEST CENTRAL ST. BERNARD PARISHES WILL EXPIRE AT 200 PM
CST...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM CST SATURDAY AFTERNOON
FOR SOUTHEAST LOUISIANA AND SOUTHERN MISSISSIPPI.

LAT...LON 2975 9015 2983 9016 2988 9024 2993 9013
      2992 9008 2994 9005 2989 8998 2991 8996
      2988 8991 2991 8990 2993 8992 2995 8999
      2998 8983 2995 8979 2979 8978
TIME...MOT...LOC 1953Z 261DEG 32KT 2986 8993

$$


24/RR

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 4, 7:31 PM CST	Flash Flood Warning	LIX	Saint Tammany, Tangipahoa	3 hr
Mar 4, 9:00 PM CST	Flash Flood Warning	LIX	Saint Tammany	80 min
Mar 5, 3:05 AM CST	Special Marine Warning	LIX		55 min
Mar 5, 3:49 AM CST	Small Craft Advisory	LIX		32 hr
Mar 5, 5:16 AM CST	River Flood Warning	LIX	Tangipahoa	53 hr
Mar 5, 6:40 AM CST	River Flood Warning	LIX	Saint Tammany	37 hr
Mar 5, 8:58 AM CST	River Flood Warning	LIX	Saint Tammany	50 hr
Mar 5, 9:03 AM CST	River Flood Warning	LIX	Saint Tammany	44 hr
Mar 5, 11:06 AM CST	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	25 min
Mar 5, 11:41 AM CST	Severe Thunderstorm Warning	LIX	Ascension, Assumption, Iberville, Saint James	34 min
Mar 5, 12:00 PM CST	Tornado Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston	30 min
Mar 5, 12:06 PM CST	Special Marine Warning	LIX		114 min
Mar 5, 12:22 PM CST	Tornado Warning	LIX	Assumption, Lafourche, Saint James, Terrebonne	23 min
Mar 5, 12:28 PM CST	Tornado Warning	LIX	Ascension, Livingston, Tangipahoa	32 min
Mar 5, 12:36 PM CST	Special Marine Warning	LIX		84 min
Mar 5, 12:49 PM CST	Tornado Warning	LIX	Lafourche, Saint Charles, Saint James, Saint John the Baptist	26 min
Mar 5, 12:51 PM CST	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Livingston, Orleans, Plaquemines, Saint Bernard and 3 more	54 min
Mar 5, 12:55 PM CST	Tornado Warning	LIX	Jefferson, Lafourche, Saint Charles	35 min
Mar 5, 12:59 PM CST	Tornado Warning	LIX	Livingston, Saint Tammany, Tangipahoa	17 min
Mar 5, 1:15 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa	30 min
Mar 5, 1:32 PM CST	Tornado Warning	LIX	Jefferson, Plaquemines, Saint Bernard	28 min
Mar 5, 1:35 PM CST	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	115 min
Mar 5, 1:40 PM CST	Special Marine Warning	LIX		95 min
Mar 5, 1:44 PM CST	Areal Flood Advisory	LIX	Saint Tammany, Washington	2 hr
Mar 5, 1:45 PM CST	Special Marine Warning	LIX		60 min
Mar 5, 1:58 PM CST	Tornado Warning	LIX	Saint Bernard	17 min
Mar 5, 2:16 PM CST	Severe Thunderstorm Warning	LIX	Plaquemines	59 min
Mar 5, 2:38 PM CST	Special Marine Warning	LIX		64 min
Mar 5, 3:08 PM CST	Special Marine Warning	LIX		2 hr
Mar 5, 3:22 PM CST	Special Marine Warning	LIX		53 min

Nearby

Tornado Warnings in Louisiana, 2011 Every tornado warning in 2011 Tornadoes in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.