Alert archive / Louisiana / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 39, NWS New Orleans, LA

March 11, 20165 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 11, 2016, 4:06 AM CST for 5 parishes in Louisiana. It was in force for 24 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
Mar 11, 2016, 4:06 AM CST (10:06 UTC)
Expired
Mar 11, 2016, 4:30 AM CST
In force
24 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

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

TimeReportWhereRemark
Mar 11, 4:11 AM CSTTSTM WND DMG10 Wsw Bayou Cane, LATREE BLOWN OVER AT 3839 BAYOU BLACK DRIVE. TIME ESTIMATED FROM RADAR.
Mar 11, 4:11 AM CSTTSTM WND DMG9 Wnw Houma, LATREE BLOWN OVER AT 4449 BAYOU BLACK DRIVE. TIME ESTIMATED FROM RADAR.

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, 10.1 hours before the alert went out and 131 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-pSkew-T log-p diagram, Slidell Radar S, LA at 00:00Z on 2016-03-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 687 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 00:00Z on 2016-03-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 463 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
687 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
512 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
463 m²/s²
0-3 km storm-relative helicity
470 m²/s²
Significant tornado parameter
1.6
Supercell composite
14.9

Open this sounding in Storm Lab

The text

As transmitted.

948 
WUUS54 KLIX 111006
SVRLIX
LAC007-057-093-095-109-111030-
/O.NEW.KLIX.SV.W.0039.160311T1006Z-160311T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
406 AM CST FRI MAR 11 2016

THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN LAFOURCHE PARISH IN SOUTHEASTERN LOUISIANA...
  CENTRAL ASSUMPTION PARISH IN SOUTHEASTERN LOUISIANA...
  SOUTHERN ST. JAMES PARISH IN SOUTHEASTERN LOUISIANA...
  SOUTHWESTERN ST. JOHN THE BAPTIST PARISH IN SOUTHEASTERN
  LOUISIANA...
  CENTRAL TERREBONNE PARISH IN SOUTHEASTERN LOUISIANA...

* UNTIL 430 AM CST

* AT 406 AM CST...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM 14 MILES SOUTHEAST OF AMELIA TO NEAR CHAUVIN TO 20
  MILES SOUTH OF COCODRIE...MOVING NORTH AT 60 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  HOUMA...THIBODAUX...NAPOLEONVILLE...LOCKPORT...MONTEGUT...SOUTH
  VACHERIE...LABADIEVILLE...MATHEWS...SCHRIEVER...SUPREME...GRAY...
  BAYOU CANE...RACELAND...CHACKBAY...CHAUVIN...PAINCOURTVILLE...NORTH
  VACHERIE...DULAC AND DES ALLEMANDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE IN
NEW ORLEANS.

&&

LAT...LON 2925 9061 2922 9060 2923 9061 2939 9065
      2945 9104 2999 9113 2999 9056 2942 9038
      2931 9041 2935 9044 2928 9048 2930 9054
      2928 9058 2925 9059 2923 9054 2920 9055
      2921 9056
TIME...MOT...LOC 1006Z 185DEG 52KT 2949 9096 2945 9065 2898 9054 

HAIL...<.75IN
WIND...60MPH
 
$$

32

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 10, 7:12 PM CSTRiver Flood WarningLIXAscension, Livingston6 days
Mar 10, 7:12 PM CSTRiver Flood WarningLIXTangipahoa50 hr
Mar 10, 7:12 PM CSTRiver Flood WarningLIXTangipahoa68 hr
Mar 10, 7:56 PM CSTFlash Flood WarningLIXAscension, Assumption, Livingston, Saint Helena, Saint James, Saint Tammany and 2 more2 hr
Mar 10, 9:28 PM CSTFlash Flood WarningLIXAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 5 more4 hr
Mar 11, 1:24 AM CSTFlash Flood WarningLIXLivingston, Saint Helena, Saint Tammany, Tangipahoa, Washington3 hr
Mar 11, 1:50 AM CSTFlash Flood Warning EmergencyLIXTangipahoa2 hr
Mar 11, 2:13 AM CSTRiver Flood WarningLIXWashington4 days
Mar 11, 2:21 AM CSTSpecial Marine WarningLIX114 min
Mar 11, 3:13 AM CSTSpecial Marine WarningLIX62 min
Mar 11, 3:33 AM CSTSpecial Weather StatementLIXAssumption, Lafourche, Saint James, Terrebonne57 min
Mar 11, 4:12 AM CSTFlash Flood WarningLIXSaint Tammany, Washington4 hr
Mar 11, 4:16 AM CSTFlash Flood Warning EmergencyLIXLivingston, Tangipahoa3 hr
Mar 11, 4:28 AM CSTSevere Thunderstorm WarningLIXAscension, Jefferson, Lafourche, Livingston, Orleans, Plaquemines and 5 more32 min
Mar 11, 4:31 AM CSTSpecial Marine WarningLIX59 min
Mar 11, 4:48 AM CSTSpecial Marine WarningLIX42 min
Mar 11, 4:57 AM CSTSevere Thunderstorm WarningLIXJefferson, Livingston, Orleans, Plaquemines, Saint Bernard, Saint Charles and 3 more33 min
Mar 11, 5:04 AM CSTCoastal Flood WarningLIXSaint John the Baptist49 hr
Mar 11, 5:08 AM CSTSpecial Marine WarningLIX67 min
Mar 11, 5:15 AM CSTSpecial Weather StatementLIXPlaquemines45 min
Mar 11, 5:18 AM CSTSpecial Marine WarningLIX42 min
Mar 11, 5:21 AM CSTSevere Thunderstorm WarningLIXOrleans, Plaquemines, Saint Bernard, Saint Tammany, Tangipahoa, Washington39 min
Mar 11, 5:50 AM CSTRiver Flood WarningLIXTangipahoa50 hr
Mar 11, 6:04 AM CSTSpecial Marine WarningLIX56 min
Mar 11, 6:30 AM CSTRiver Flood WarningLIXAscension, Livingston7 days
Mar 11, 7:22 AM CSTFlash Flood Warning EmergencyLIXSaint Tammany, Tangipahoa, Washington13 hr
Mar 11, 7:37 AM CSTAreal Flood WarningLIXAscension, East Baton Rouge, Livingston9 hr
Mar 11, 7:58 AM CSTAreal Flood WarningLIXSaint Tammany3 hr
Mar 11, 8:53 AM CSTAreal Flood WarningLIXEast Baton Rouge, East Feliciana, Saint Helena3 hr
Mar 11, 12:01 PM CSTFlash Flood WarningLIXSaint Tammany8 hr
Mar 11, 12:08 PM CSTFlash Flood Warning EmergencyLIXSaint Tammany8 hr
Mar 11, 4:29 PM CSTAreal Flood WarningLIXLivingston3 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2016Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.