Alert archive / Louisiana / Tornado Warnings in 2006

Tornado Warning 27, NWS New Orleans, LA

October 16, 2006Jefferson Parish, Lafourche Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Oct 16, 2006, 4:16 AM CDT for Jefferson Parish, Lafourche Parish, Louisiana. It was in force for 29 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: Oct 16, 2006, 4:16 AM CDT (09:16 UTC)
Expired: Oct 16, 2006, 4:45 AM CDT
In force: 29 min
Issued by: NWS New Orleans, LA
Area: Counties, with a storm outline in the text

Counties Jefferson Parish, LA, Lafourche Parish, LA

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this tornado warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 16, 2:13 AM CDT	Tornado Watch	SPC	4 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.3 hours before the alert went out and 74 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 841 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 232 m²/s²
0-3 km storm-relative helicity: 374 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 160916
TORLIX
LAC051-057-160945-
/O.NEW.KLIX.TO.W.0027.061016T0916Z-061016T0945Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
416 AM CDT MON OCT 16 2006

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  JEFFERSON PARISH IN SOUTHEAST LOUISIANA
  THIS INCLUDES THE CITY OF MARRERO
  LAFOURCHE PARISH IN SOUTHEAST LOUISIANA

* UNTIL 445 AM CDT

* AT 413 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES
  SOUTHWEST OF LAFITTE...OR ABOUT 10 MILES NORTHEAST OF CUT OFF...
  MOVING NORTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BARATARIA AND JEAN LAFITTE

GET 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 1000 AM CDT MONDAY MORNING
FOR SOUTHEAST LOUISIANA.

LAT...LON 2961 9025 2964 9025 2970 9022 2975 9013
      2984 9016 2988 9014 2988 9011 2985 9006
      2974 9006 2959 9017 2959 9020

$$

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this tornado warning went out at Oct 15, 9:46 PM CDT, 6 hours 30 minutes earlier.

Area forecast discussion, Oct 15, 9:46 PM CDT, 6 hours 30 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS LA
946 PM CDT SUN OCT 15 2006

.UPDATE...
WILL BE UPDATING PACKAGE MAINLY TO BRING WATCHES IN LINE AND
UPDATED. THE MAIN CHANGE WILL BE AN UPGRADE OF THE COASTAL FLOOD
ADVISORY TO A COASTAL FLOOD WATCH FOR THE SAME AREA AROUND LAKES
PONTCHARTRAIN AND MAUREPAS AND ALONG THE MISSISSIPPI AND SOUTHEAST
LOUISIANA COAST. HAVE MADE SOME ADJUSTMENTS TO THE WINDS AS WELL.

THE UPCOMING 24 TO 36 HOURS WILL BECOME QUITE ACTIVE AS STRONG
WARM FRONTOGENESIS REGION IN THE GULF MOVES NORTHWARD. VAD WIND
PROFILERS AND 00Z SOUNDING WINDS SHOW STRONG TURNING IN THE LOWER
LEVELS INDICATIVE OF HIGH HELICITIES. THE SURFACE BOUNDARY SHOULD
MOVE ONSHORE AROUND 4 AM CDT WITH THE GREATEST SHEAR OCCURRING
JUST NORTH AND ALONG THIS BOUNDARY DURING THE MORNING HOURS. OUT
OF RESPECT FOR THE HIGH DIRECTIONAL AND SPEED SHEAR AND INCREASING
INSTABILITY...A VIABLE MARINE AIRMASS TORNADO THREAT APPEARS TO BE
MATERIALIZING. HEAVY RAINFALL ALSO SEEMS ON TRACK FOR THE WESTERN
HALF OF THE FORECAST AREA. UPDATES OUT SHORTLY.

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...COASTAL FLOOD WATCH THROUGH TUESDAY MORNING FOR LAZ038-LAZ040-
     LAZ050-LAZ058-LAZ060-LAZ061-LAZ062-LAZ064-LAZ066-LAZ067-
     LAZ068-LAZ069-LAZ070.

     SMALL CRAFT ADVISORY UNTIL 7 AM CDT TUESDAY FOR LAZ066.

     FLASH FLOOD WATCH THROUGH TUESDAY MORNING FOR LAZ034-LAZ035-
     LAZ036-LAZ037-LAZ038-LAZ046-LAZ047-LAZ048-LAZ049-LAZ050.

GM...SMALL CRAFT ADVISORY UNTIL 7 AM CDT TUESDAY FOR GMZ550-GMZ555-
     GMZ570-GMZ575.

     SMALL CRAFT ADVISORY UNTIL 1 AM CDT TUESDAY FOR GMZ530.

MS...COASTAL FLOOD WATCH THROUGH TUESDAY MORNING FOR MSZ080-MSZ081-
     MSZ082.

     FLASH FLOOD WATCH THROUGH TUESDAY MORNING FOR MSZ068-MSZ069-
     MSZ070.

GM...SMALL CRAFT ADVISORY UNTIL 7 AM CDT TUESDAY FOR GMZ550-GMZ555-
     GMZ570-GMZ575.

     SMALL CRAFT ADVISORY UNTIL 1 AM CDT TUESDAY FOR GMZ530.

&&

24

Hazardous weather outlook, Oct 15, 10:31 PM CDT, 5 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1031 PM CDT SUN OCT 15 2006

LAZ034>040-046>050-056>070-MSZ068>071-077-080>082-170345-
POINTE COUPEE-WEST FELICIANA-EAST FELICIANA-ST. HELENA-TANGIPAHOA-
WASHINGTON-ST. TAMMANY-IBERVILLE-WEST BATON ROUGE-
EAST BATON ROUGE-ASCENSION-LIVINGSTON-ASSUMPTION-ST. JAMES-
ST. JOHN THE BAPTIST-UPPER LAFOURCHE-ST. CHARLES-UPPER JEFFERSON-
ORLEANS-UPPER PLAQUEMINES-UPPER ST. BERNARD-UPPER TERREBONNE-
LOWER TERREBONNE-LOWER LAFOURCHE-LOWER JEFFERSON-
LOWER PLAQUEMINES-LOWER ST. BERNARD-WILKINSON-AMITE-PIKE-WALTHALL-
PEARL RIVER-HANCOCK-HARRISON-JACKSON-
1031 PM CDT SUN OCT 15 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST
LOUISIANA AND SOUTHERN MISSISSIPPI.

.DAY ONE...TONIGHT

.SEVERE THUNDERSTORMS...
STRONG WIND SHEAR IN THE LOWER LEVELS OF THE ATMOSPHERE ALONG A
STRONG WARM FRONT MOVING NORTH OUT OF THE GULF OF MEXICO WILL BE
CONDUCIVE TO SEVERE THUNDERSTORM DEVELOPMENT. THERE IS A SLIGHT
RISK OF SEVERE THUNDERSTORMS LATER TONIGHT AND MONDAY MORNING. THE
PRIMARY THREAT WILL BE ISOLATED TORNADOES DEVELOPING FROM
STRONGLY ROTATING STORMS MOVING OUT OF THE COASTAL AREAS. DAMAGING
WINDS AND PERIODS OF VERY HEAVY RAINFALL CAN ALSO OCCUR PRIMARILY
AFTER 4 AM MONDAY.

.FLOODING...
A FLOOD WATCH IS IN EFFECT FOR THE EAST-CENTRAL AND SOUTH-
CENTRAL PARISHES OF LOUISIANA...INCLUDING THE GREATER BATON ROUGE
AREA. THE GREATEST THREAT OF FLOODING RAINS WILL BE GENERALLY
AFTER 3 AM MONDAY...CONTINUING INTO MONDAY EVENING.

.MARINE HAZARDS...
A COASTAL FLOOD WATCH IS IN EFFECT UNTIL TUESDAY
MORNING FOR THE MISSISSIPPI AND SOUTHEAST LOUISIANA COAST.
ABNORMALLY HIGH TIDES OF 2 FEET ABOVE NORMAL CAN BE EXPECTED. THIS
MAY CAUSE SOME FLOODING OF LOW LYING COASTAL AREAS...PARTICULARLY
DURING THE DAILY HIGH TIDE PERIOD DURING THE MORNING HOURS.

A SMALL CRAFT ADVISORY IS IN EFFECT FOR ROUGH SEAS AND STRONG EAST
WINDS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

WIDESPREAD RAIN AND THUNDERSTORMS WILL CONTINUE MONDAY INTO TUESDAY
ACROSS THE AREA...AS A SLOW MOVING AREA OF LOW PRESSURE PASSES
THROUGH THE TENNESSEE VALLEY. A SLIGHT RISK OF SEVERE
THUNDERSTORMS WILL CONTINUE MONDAY INTO MONDAY NIGHT. THE MAIN
THREAT FROM ANY THUNDERSTORMS WILL BE VERY HEAVY
RAINFALL...FREQUENT LIGHTNING...STRONG WINDS...AND ISOLATED
TORNADOES. RAINFALL AMOUNTS OF 2 TO 3 INCHES ARE POSSIBLE WITH THE
HEAVIEST THUNDERSTORMS...WITH TOTAL RAINFALL AMOUNTS OF 4 TO 6
INCHES POSSIBLE ACROSS THE REGION BY TUESDAY MORNING. LOCALIZED
FLOODING OF LOW LYING AREAS AND STREETS WILL BE POSSIBLE.

STRONG SOUTHEAST WINDS OF 20 TO 30 KNOTS OVER THE COASTAL WATERS
WILL CONTINUE TO PROMPT SMALL CRAFT CONDITIONS THROUGH TUESDAY.
THESE WINDS WILL ALSO KEEP TIDE LEVELS HIGH ON SOUTH AND EAST
FACING SHORES WITH TIDES RUNNING UP TO 2 FEET ABOVE NORMAL. SOME
FLOODING OF COASTAL AREAS OUTSIDE OF HURRICANE PROTECTION LEVEES
WILL CONTINUE TO BE POSSIBLE.

SCATTERED THUNDERSTORMS ARE EXPECTED WEDNESDAY AND THURSDAY AS A
COLD FRONT SWEEPS THROUGH THE AREA. A FEW STRONG TO SEVERE
THUNDERSTORMS ARE POSSIBLE ON THURSDAY NEAR THE FRONT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS BEING REQUESTED FOR LATE TONIGHT AND
MONDAY...MAINLY IN THE LOUISIANA COASTAL PARISHES BEFORE DAYBREAK
AND IN THE NEW ORLEANS AND BATON ROUGE METRO AREAS FROM DAYBREAK
THROUGH MONDAY. LAW ENFORCEMENT AGENCIES AND FIRST RESPONDERS
SHOULD PLAN ACCORDINGLY FOR AN EXTENDED PERIOD OF ACTIVE WEATHER.
PLEASE NOTIFY THE NATIONAL WEATHER SERVICE OFFICE IN SLIDELL
PROMPTLY IF SEVERE WEATHER OCCURS IN YOUR AREA.

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 9:58 PM CDT	Coastal Flood Watch	LIX	Saint Bernard, Saint John the Baptist	7 hr
Oct 16, 1:41 AM CDT	Special Marine Warning	LIX		94 min
Oct 16, 2:11 AM CDT	Tornado Warning	LIX	Lafourche	49 min
Oct 16, 3:17 AM CDT	Tornado Warning	LIX	Lafourche	58 min
Oct 16, 3:21 AM CDT	Tornado Warning	LIX	Plaquemines	54 min
Oct 16, 3:43 AM CDT	Special Marine Warning	LIX		2 hr
Oct 16, 4:10 AM CDT	Tornado Warning	LIX	Ascension	35 min
Oct 16, 4:26 AM CDT	Tornado Warning	LIX	Plaquemines	34 min
Oct 16, 4:33 AM CDT	Tornado Warning	LIX	Livingston	27 min
Oct 16, 4:37 AM CDT	Coastal Flood Warning	LIX	Saint Bernard, Saint John the Baptist	31 hr
Oct 16, 4:41 AM CDT	Tornado Warning	LIX	Jefferson	34 min
Oct 16, 4:51 AM CDT	Tornado Warning	LIX	Jefferson, Orleans	24 min
Oct 16, 5:00 AM CDT	Tornado Warning	LIX	Plaquemines	45 min
Oct 16, 5:12 AM CDT	Tornado Warning	LIX	Washington	33 min
Oct 16, 5:18 AM CDT	Tornado Warning	LIX	Orleans	27 min
Oct 16, 5:21 AM CDT	Special Marine Warning	LIX		39 min
Oct 16, 5:44 AM CDT	Special Marine Warning	LIX		91 min
Oct 16, 5:46 AM CDT	Tornado Warning	LIX	Plaquemines, Saint Bernard	29 min
Oct 16, 7:09 AM CDT	Special Marine Warning	LIX		96 min
Oct 16, 8:44 AM CDT	Special Marine Warning	LIX		91 min
Oct 16, 10:07 AM CDT	Special Marine Warning	LIX		83 min
Oct 16, 1:22 PM CDT	Wind Advisory	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 6 more	9 hr

Nearby

Tornado Warnings in Louisiana, 2006 Every tornado warning in 2006 Tornadoes in 2006

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.