Alert archive / Louisiana / Tornado Warnings in 2016

Tornado Warning 53, NWS New Orleans, LA

April 13, 20165 parishes in Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 13, 2016, 6:11 AM CDT for 5 parishes in Louisiana. It was in force for 34 min. 2 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: Apr 13, 2016, 6:11 AM CDT (11:11 UTC)
Expired: Apr 13, 2016, 6:45 AM CDT
In force: 34 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Assumption Parish, LA, Lafourche Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Terrebonne Parish, LA

What was reported inside it

Time	Report	Where	Remark
Apr 13, 6:15 AM CDT	HAIL 0.75	3 Nne Thibodaux, LA	EMERGENCY MANAGEMENT REPORTED DIME SIZE HAIL IN CHACKBAY. RADAR ESTIMATED THE TIME OF THE EVENT.
Apr 13, 6:15 AM CDT	HAIL 1.5	3 Nne Thibodaux, LA	PUBLIC PICTURE VIA SOCIAL MEDIA REPORTED PING PONG BALL SIZED HAIL IN CHACKBAY.

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 11.2 hours before the alert went out and 119 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: 558 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 194 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

479 
WFUS54 KLIX 131111
TORLIX
LAC007-057-093-095-109-131145-
/O.NEW.KLIX.TO.W.0053.160413T1111Z-160413T1145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
611 AM CDT WED APR 13 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN LAFOURCHE PARISH IN SOUTHEASTERN LOUISIANA...
  EAST CENTRAL ASSUMPTION PARISH IN SOUTHEASTERN LOUISIANA...
  SOUTHEASTERN ST. JAMES PARISH IN SOUTHEASTERN LOUISIANA...
  SOUTHWESTERN ST. JOHN THE BAPTIST PARISH IN SOUTHEASTERN
  LOUISIANA...
  NORTH CENTRAL TERREBONNE PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 645 AM CDT
    
* AT 610 AM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR LABADIEVILLE...MOVING EAST AT 35 MPH.

  HAZARD...TORNADO AND GOLF BALL SIZE HAIL. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...FLYING DEBRIS WILL BE DANGEROUS TO THOSE CAUGHT WITHOUT 
           SHELTER. MOBILE HOMES WILL BE DAMAGED OR DESTROYED. 
           DAMAGE TO ROOFS...WINDOWS...AND VEHICLES WILL OCCUR.  TREE 
           DAMAGE IS LIKELY. 

* THIS DANGEROUS STORM WILL BE NEAR...
  THIBODAUX AROUND 620 AM CDT. 
  CHACKBAY AROUND 630 AM CDT. 
  SOUTH VACHERIE AROUND 635 AM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF YOU ARE OUTDOORS...IN A
MOBILE HOME...OR IN A VEHICLE...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER
AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 2971 9095 2989 9100 2996 9062 2975 9061
TIME...MOT...LOC 1110Z 255DEG 29KT 2983 9089 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 5:09 AM CDT	Special Weather Statement	LIX	Assumption	36 min
Apr 13, 5:37 AM CDT	Severe Thunderstorm Warning	LIX	Assumption	23 min
Apr 13, 5:50 AM CDT	Tornado Warning	LIX	Assumption, Lafourche, Saint James	25 min
Apr 13, 6:43 AM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Saint Charles, Saint John the Baptist	32 min
Apr 13, 7:44 AM CDT	Special Weather Statement	LIX	Plaquemines	31 min
Apr 13, 7:55 AM CDT	Special Weather Statement	LIX	Saint Charles, Saint James, Saint John the Baptist	65 min
Apr 13, 8:19 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles	4 hr
Apr 13, 9:46 AM CDT	Special Marine Warning	LIX		89 min
Apr 13, 10:22 AM CDT	Special Marine Warning	LIX		68 min
Apr 13, 11:10 AM CDT	Special Marine Warning	LIX		65 min
Apr 13, 11:39 AM CDT	Special Marine Warning	LIX		96 min
Apr 13, 11:47 AM CDT	Special Marine Warning	LIX		88 min
Apr 13, 11:48 AM CDT	Special Marine Warning	LIX		87 min

Nearby

Tornado Warnings in Louisiana, 2016 Every tornado warning in 2016 Tornadoes in 2016

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.