Alert archive / Louisiana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 21, NWS New Orleans, LA

February 15, 20165 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Feb 15, 2016, 2:44 PM CST for 5 parishes in Louisiana. It was in force for 31 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: Feb 15, 2016, 2:44 PM CST (20:44 UTC)
Expired: Feb 15, 2016, 3:15 PM CST
In force: 31 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Ascension Parish, LA, East Baton Rouge Parish, LA, Iberville Parish, LA, Livingston Parish, LA, West Baton Rouge 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
Feb 15, 9:30 AM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.7 hours before the alert went out and 154 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: 569 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 320 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.4

Open this sounding in Storm Lab

The text

As transmitted.

509 
WUUS54 KLIX 152044
SVRLIX
LAC005-033-047-063-121-152115-
/O.NEW.KLIX.SV.W.0021.160215T2044Z-160215T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
244 PM CST MON FEB 15 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL LIVINGSTON PARISH IN SOUTHEASTERN LOUISIANA...
  WEST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA...
  CENTRAL IBERVILLE PARISH IN SOUTHEASTERN LOUISIANA...
  SOUTHWESTERN EAST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA...
  NORTHWESTERN ASCENSION PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 315 PM CST

* AT 244 PM CST...A SEVERE THUNDERSTORM WAS LOCATED NEAR GROSSE
  TETE...OR 9 MILES WEST OF PORT ALLEN...MOVING EAST AT 45 MPH.

  HAZARD...QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...DAMAGE TO VEHICLES IS EXPECTED. 

* LOCATIONS IMPACTED INCLUDE...
  BATON ROUGE...DENHAM SPRINGS...PLAQUEMINE...PORT ALLEN...OAK HILLS
  PLACE...ST. GABRIEL...ADDIS...BRUSLY...ROSEDALE...GROSSE TETE...
  SHENANDOAH...INNISWOLD...OLD JEFFERSON...PRAIRIEVILLE...
  MERRYDALE...GARDERE...WESTMINSTER...VILLAGE ST. GEORGE...ERWINVILLE
  AND BATON ROUGE AIRPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM IS PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY
STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CST FOR SOUTHEASTERN
LOUISIANA.

LAT...LON 3051 9142 3052 9142 3053 9141 3053 9090
      3029 9088 3029 9143 3051 9144
TIME...MOT...LOC 2044Z 260DEG 38KT 3040 9135 

HAIL...1.00IN
WIND...<50MPH
 
$$

1 follow-up statement

738 
WWUS54 KLIX 152117
SVSLIX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
317 PM CST MON FEB 15 2016

LAC005-033-047-063-121-152126-
/O.EXP.KLIX.SV.W.0021.000000T0000Z-160215T2115Z/
LIVINGSTON LA-WEST BATON ROUGE LA-IBERVILLE LA-EAST BATON ROUGE LA-
ASCENSION LA-
317 PM CST MON FEB 15 2016

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL LIVINGSTON...WEST
BATON ROUGE...CENTRAL IBERVILLE...SOUTHWESTERN EAST BATON ROUGE AND
NORTHWESTERN ASCENSION PARISHES HAS EXPIRED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING HAS BEEN ALLOWED TO
EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 600 PM CST FOR SOUTHEASTERN
LOUISIANA.

LAT...LON 3051 9142 3052 9142 3053 9141 3053 9090
      3029 9088 3029 9143 3051 9144
TIME...MOT...LOC 2113Z 260DEG 38KT 3040 9135 

$$

11

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 15, 5:35 AM CST	Special Weather Statement	LIX	Washington	55 min
Feb 15, 6:26 AM CST	Special Weather Statement	LIX	Washington	34 min
Feb 15, 10:31 AM CST	Severe Thunderstorm Warning	LIX	Pointe Coupee, West Feliciana	44 min
Feb 15, 10:47 AM CST	Small Craft Advisory	LIX		7 hr
Feb 15, 11:05 AM CST	Severe Thunderstorm Warning	LIX	East Feliciana, Pointe Coupee, West Feliciana	40 min
Feb 15, 11:31 AM CST	Severe Thunderstorm Warning	LIX	East Feliciana, West Feliciana	29 min
Feb 15, 11:44 AM CST	Tornado Warning	LIX	East Feliciana, West Feliciana	31 min
Feb 15, 11:46 AM CST	Special Marine Warning	LIX		59 min
Feb 15, 12:01 PM CST	Special Weather Statement	LIX	Iberville, Pointe Coupee, West Baton Rouge, West Feliciana	29 min
Feb 15, 12:06 PM CST	Tornado Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, West Feliciana	24 min
Feb 15, 12:13 PM CST	Tornado Warning	LIX	East Feliciana, Saint Helena, Tangipahoa	32 min
Feb 15, 12:27 PM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, West Feliciana	33 min
Feb 15, 12:31 PM CST	Special Weather Statement	LIX	Orleans	29 min
Feb 15, 12:38 PM CST	Special Marine Warning	LIX		67 min
Feb 15, 12:42 PM CST	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa, Washington	48 min
Feb 15, 12:50 PM CST	Special Weather Statement	LIX	Saint Tammany	25 min
Feb 15, 12:54 PM CST	Special Weather Statement	LIX	Saint Charles	36 min
Feb 15, 1:50 PM CST	Special Weather Statement	LIX	Tangipahoa	25 min
Feb 15, 1:54 PM CST	Special Weather Statement	LIX	West Baton Rouge	36 min
Feb 15, 1:55 PM CST	Special Weather Statement	LIX	Saint Bernard	35 min
Feb 15, 2:09 PM CST	Special Weather Statement	LIX	Washington	36 min
Feb 15, 2:21 PM CST	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Livingston	24 min
Feb 15, 2:24 PM CST	Special Weather Statement	LIX	Tangipahoa	36 min
Feb 15, 2:33 PM CST	Special Weather Statement	LIX	Saint Tammany	27 min
Feb 15, 2:53 PM CST	Special Weather Statement	LIX	Livingston	37 min
Feb 15, 2:56 PM CST	Special Weather Statement	LIX	Saint Tammany	34 min
Feb 15, 3:23 PM CST	Special Marine Warning	LIX		37 min
Feb 15, 3:24 PM CST	Special Weather Statement	LIX	Livingston	51 min
Feb 15, 3:31 PM CST	Special Weather Statement	LIX	Ascension	44 min
Feb 15, 3:39 PM CST	Special Marine Warning	LIX		36 min
Feb 15, 3:43 PM CST	Special Marine Warning	LIX		62 min
Feb 15, 3:47 PM CST	Special Weather Statement	LIX	Plaquemines	28 min
Feb 15, 3:53 PM CST	Special Marine Warning	LIX		67 min
Feb 15, 4:11 PM CST	Special Weather Statement	LIX	Assumption, Saint James	34 min
Feb 15, 4:14 PM CST	Special Marine Warning	LIX		61 min
Feb 15, 4:30 PM CST	Special Marine Warning	LIX		60 min
Feb 15, 4:40 PM CST	Special Marine Warning	LIX		65 min
Feb 15, 4:55 PM CST	Special Weather Statement	LIX	Saint Charles	65 min
Feb 15, 5:06 PM CST	Special Weather Statement	LIX	Jefferson	24 min
Feb 15, 5:29 PM CST	Special Marine Warning	LIX		91 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2016 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.