Alert archive / Louisiana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 271, NWS New Orleans, LA

May 12, 1995Lafourche Parish, Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at May 12, 1995, 12:41 PM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 64 min.

The area

The counties it named.

The facts

Issued
May 12, 1995, 12:41 PM CDT (17:41 UTC)
Expired
May 12, 1995, 1:45 PM CDT
In force
64 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Lafourche Parish, LA, Terrebonne Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.7 hours before the alert went out and 128 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 12:00Z on 1995-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 939 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 12:00Z on 1995-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.193958Sfc1 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
939 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
908 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
181 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNEW 121744
SVRNEW
LAC057-109-121845-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1241 PM CDT FRI MAY 12 1995
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  145 PM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...NORTHERN LAFOURCHE PARISH...WESTERN TERREBONNE PARISH
 
AND THE ADJACENT COASTAL WATERS OF SOUTHEAST LOUISIANA.
 
AT 1235 PM CDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A CLUSTER OF SEVERE THUNDERSTORMS FROM NEAR NAPOLEONVILLE TO
WEST OF MORGAN CITY. THESE THUNDERSTORMS WERE MOVING EAST-SOUTHEAST
AT 25 MILES PER HOUR. THE COMMUNITIES OF THIBODAUX..RACELAND AND
HOUMA ARE IN THE PATH OF THESE THUNDERSTORMS.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

IssuedProductOfficeCountiesLasted
May 12, 2:13 AM CDTSevere Thunderstorm WarningLIXLivingston2 hr
May 12, 2:13 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, Iberville67 min
May 12, 2:56 AM CDTSevere Thunderstorm WarningLIXAscension24 min
May 12, 2:56 AM CDTSevere Thunderstorm WarningLIXSaint John the Baptist, Tangipahoa95 min
May 12, 3:28 AM CDTSevere Thunderstorm WarningLIXSaint Tammany102 min
May 12, 5:35 AM CDTSevere Thunderstorm WarningLIXAvoyelles, Saint Landry55 min
May 12, 6:16 AM CDTSevere Thunderstorm WarningLIXAvoyelles, Saint Landry59 min
May 12, 7:16 AM CDTSevere Thunderstorm WarningLIXPointe Coupee44 min
May 12, 7:39 AM CDTSevere Thunderstorm WarningLIXSaint Landry66 min
May 12, 8:38 AM CDTSevere Thunderstorm WarningLIXAvoyelles, Saint Landry67 min
May 12, 9:41 AM CDTSevere Thunderstorm WarningLIXAvoyelles64 min
May 12, 10:11 AM CDTFlash Flood WarningLIXPointe Coupee, West Feliciana64 min
May 12, 10:11 AM CDTSevere Thunderstorm WarningLIXPointe Coupee, West Feliciana64 min
May 12, 10:38 AM CDTSevere Thunderstorm WarningLIXIberia, Saint Martin67 min
May 12, 10:57 AM CDTSevere Thunderstorm WarningLIXPointe Coupee42 min
May 12, 10:57 AM CDTSevere Thunderstorm WarningLIXIberville, West Baton Rouge63 min
May 12, 11:27 AM CDTSevere Thunderstorm WarningLIXAssumption, Saint Martin, St. Mary63 min
May 12, 12:23 PM CDTSevere Thunderstorm WarningLIXAssumption, Iberia, Saint Martin, St. Mary67 min
May 12, 1:35 PM CDTTornado WarningLIXAssumption, St. Mary, Terrebonne25 min
May 12, 1:39 PM CDTSevere Thunderstorm WarningLIXLafourche66 min
May 12, 1:54 PM CDTSevere Thunderstorm WarningLIXTerrebonne66 min
May 12, 2:31 PM CDTSevere Thunderstorm WarningLIXLafourche59 min
May 12, 3:11 PM CDTSevere Thunderstorm WarningLIXEast Feliciana53 min
May 12, 3:11 PM CDTSevere Thunderstorm WarningLIXWest Feliciana64 min
May 12, 3:26 PM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche64 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1995Every severe thunderstorm warning in 1995

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.