Alert archive / Louisiana / Tornado Warnings in 2015

Tornado Warning 35, NWS New Orleans, LA

October 31, 2015Ascension Parish, Livingston Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Oct 31, 2015, 12:28 PM CDT for Ascension Parish, Livingston Parish, Louisiana. It was in force for 32 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 31, 2015, 12:28 PM CDT (17:28 UTC)
Expired: Oct 31, 2015, 1:00 PM CDT
In force: 32 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Ascension Parish, LA, Livingston 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
Oct 31, 11:45 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.5 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 292 m²/s²
0-3 km storm-relative helicity: 361 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.

852 
WFUS54 KLIX 311728
TORLIX
LAC005-063-311800-
/O.NEW.KLIX.TO.W.0035.151031T1728Z-151031T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1228 PM CDT SAT OCT 31 2015

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTH CENTRAL LIVINGSTON PARISH IN SOUTHEASTERN LOUISIANA...
  CENTRAL ASCENSION PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 100 PM CDT
    
* AT 1228 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED NEAR GONZALES...MOVING NORTHEAST AT 40 MPH.

  HAZARD...TORNADO. 

  SOURCE...RADAR INDICATED ROTATION. 

  IMPACT...EXPECT DAMAGE TO MOBILE HOMES...ROOFS AND VEHICLES. 

* THIS DANGEROUS STORM WILL BE NEAR...
  FRENCH SETTLEMENT AND PORT VINCENT AROUND 1250 PM 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 3011 9095 3017 9102 3034 9092 3034 9066
TIME...MOT...LOC 1728Z 214DEG 35KT 3019 9096 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

CAB

2 follow-up statements

354 
WWUS54 KLIX 311743
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1243 PM CDT SAT OCT 31 2015

LAC005-063-311800-
/O.CON.KLIX.TO.W.0035.000000T0000Z-151031T1800Z/
LIVINGSTON LA-ASCENSION LA-
1243 PM CDT SAT OCT 31 2015

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR SOUTH
CENTRAL LIVINGSTON AND NORTH CENTRAL ASCENSION PARISHES...
    
AT 1243 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR PORT VINCENT...OR NEAR GONZALES...MOVING NORTHEAST
AT 35 MPH.

HAZARD...TORNADO. 

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 TORNADIC THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF
SOUTH CENTRAL LIVINGSTON AND NORTH CENTRAL ASCENSION PARISHES.

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 3022 9089 3023 9095 3034 9092 3034 9066
TIME...MOT...LOC 1743Z 215DEG 32KT 3029 9087 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CAB

530 
WWUS54 KLIX 311758
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1258 PM CDT SAT OCT 31 2015

LAC005-063-311808-
/O.EXP.KLIX.TO.W.0035.000000T0000Z-151031T1800Z/
LIVINGSTON LA-ASCENSION LA-
1258 PM CDT SAT OCT 31 2015

...THE TORNADO WARNING FOR SOUTH CENTRAL LIVINGSTON AND NORTH CENTRAL
ASCENSION PARISHES WILL EXPIRE AT 100 PM CDT...
    
THE TORNADIC THUNDERSTORM WHICH PROMPTED THE WARNING HAS !**
WEAKENED. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT FOR SOUTHEASTERN
LOUISIANA.

LAT...LON 3022 9089 3023 9095 3034 9092 3034 9066
TIME...MOT...LOC 1756Z 214DEG 35KT 3029 9087 

$$

CAB

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 31, 4:02 AM CDT	Small Craft Advisory	LIX		15 hr
Oct 31, 11:46 AM CDT	River Flood Warning	LIX	Saint Tammany	54 hr
Oct 31, 12:13 PM CDT	Special Weather Statement	LIX	Ascension	47 min
Oct 31, 12:39 PM CDT	Tornado Warning	LIX	Pointe Coupee	36 min
Oct 31, 1:17 PM CDT	Special Weather Statement	LIX	Livingston	43 min
Oct 31, 1:21 PM CDT	Tornado Warning	LIX	Livingston	24 min
Oct 31, 1:33 PM CDT	Tornado Warning	LIX	Tangipahoa	42 min
Oct 31, 1:35 PM CDT	Tornado Warning	LIX	Saint Tammany, Washington	40 min
Oct 31, 1:38 PM CDT	Special Weather Statement	LIX	East Baton Rouge	22 min
Oct 31, 1:43 PM CDT	Severe Thunderstorm Warning	LIX	East Feliciana	32 min
Oct 31, 1:55 PM CDT	Tornado Warning Tornado observed	LIX	Tangipahoa	35 min
Oct 31, 2:03 PM CDT	Tornado Warning	LIX	East Baton Rouge, Livingston, Saint Helena	27 min
Oct 31, 2:22 PM CDT	Tornado Warning	LIX	Saint Helena	23 min
Oct 31, 2:45 PM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	60 min
Oct 31, 3:05 PM CDT	Tornado Warning	LIX	Tangipahoa	25 min
Oct 31, 3:23 PM CDT	Severe Thunderstorm Warning	LIX	Washington	37 min
Oct 31, 3:29 PM CDT	Tornado Warning	LIX	Saint Tammany, Washington	31 min
Oct 31, 4:02 PM CDT	Areal Flood Warning	LIX	East Baton Rouge, East Feliciana, Iberville, Livingston, Saint Helena, West Baton Rouge	3 hr
Oct 31, 4:17 PM CDT	Special Marine Warning	LIX		58 min
Oct 31, 5:28 PM CDT	Special Marine Warning	LIX		47 min

Nearby

Tornado Warnings in Louisiana, 2015 Every tornado warning in 2015 Tornadoes in 2015

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.