Alert archive / Louisiana / Tornado Warnings in 2015

Tornado Warning 40, NWS New Orleans, LA

October 31, 2015Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Oct 31, 2015, 1:55 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 35 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, 1:55 PM CDT (18:55 UTC)
Expired: Oct 31, 2015, 2:30 PM CDT
In force: 35 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Observed
Hail: 0.0 in

County Tangipahoa 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, 6.9 hours before the alert went out and 97 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.

629 
WFUS54 KLIX 311855
TORLIX
LAC105-311930-
/O.NEW.KLIX.TO.W.0040.151031T1855Z-151031T1930Z/

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

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN TANGIPAHOA PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 230 PM CDT

* AT 154 PM CDT...A CONFIRMED TORNADO WAS LOCATED OVER ROSELAND...OR
  OVER AMITE...MOVING NORTHEAST AT 40 MPH.

  HAZARD...DAMAGING TORNADO. 

  SOURCE...PUBLIC CONFIRMED TORNADO. 

  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
  NORTHWESTERN TANGIPAHOA PARISH.

A TORNADO WAS REPORTED BY THE PUBLIC NEAR ALBANY EARLIER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 3096 9035 3091 9035 3090 9033 3089 9033
      3089 9032 3086 9031 3071 9049 3073 9053
      3100 9045 3100 9036
TIME...MOT...LOC 1854Z 208DEG 34KT 3077 9048 

TORNADO...OBSERVED
HAIL...0.00IN

$$

CAB

1 follow-up statement

245 
WWUS54 KLIX 311928
SVSLIX

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

LAC105-311938-
/O.EXP.KLIX.TO.W.0040.000000T0000Z-151031T1930Z/
TANGIPAHOA LA-
228 PM CDT SAT OCT 31 2015

...THE TORNADO WARNING FOR NORTHWESTERN TANGIPAHOA PARISH WILL EXPIRE
AT 230 PM CDT...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING WILL BE ALLOWED TO
EXPIRE.

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

LAT...LON 3096 9035 3091 9035 3090 9033 3089 9033
      3089 9032 3086 9031 3071 9049 3073 9053
      3100 9045 3100 9036
TIME...MOT...LOC 1927Z 208DEG 34KT 3077 9048 

$$

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, 12:28 PM CDT	Tornado Warning	LIX	Ascension, Livingston	32 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, 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.