Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 92, NWS New Orleans, LA

April 12, 1997Iberville Parish, Pointe Coupee Parish, West Baton Rouge Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 12, 1997, 12:55 AM CDT for Iberville Parish, Pointe Coupee Parish, West Baton Rouge 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 counties it named.

The facts

Issued
Apr 12, 1997, 12:55 AM CDT (05:55 UTC)
Expired
Apr 12, 1997, 1:30 AM CDT
In force
35 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Iberville Parish, LA, Pointe Coupee Parish, LA, West Baton Rouge Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 5.9 hours before the alert went out and 175 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, Lake Charles Mun, LA at 00:00Z on 1997-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 453 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, Lake Charles Mun, LA at 00:00Z on 1997-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 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
453 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
966 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
161 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 120557 RRA
SVRNEW
LAC047-077-121-120630-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1255 AM CDT SAT APR 12 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  130 AM CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...NORTHERN IBERVILLE PARISH...SOUTHERN POINTE COUPEE PARISH
   ...WEST BATON ROUGE PARISH
 
AT 1250 AM CDT...RADAR IN SLIDELL INDICATED A SEVERE THUNDERSTORM NEAR
MARINGOUIN MOVING TO THE EAST AT 30 MPH. LARGE HAIL AND DAMAGING WINDS
ARE LIKELY TO OCCUR WITH THIS STORM.
 
PERSONS IN THE PATH OF STORM...MAINLY BETWEEN U.S. HIGHWAY 190 AND
INTERSTATE 10 EAST OF ERWINVILLE AND GROSSE TETE...NEED TO TAKE
PROTECTIVE COVER IN A STURDY STRUCTURE. STAY AWAY FROM WINDOWS.
 
THIS STORM WILL BE APPROACHING THE PORT ALLEN AREA BEFORE 130 AM CDT.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 12, 2:35 AM CDTSevere Thunderstorm WarningLIXLivingston40 min
Apr 12, 6:01 AM CDTSevere Thunderstorm WarningLIXSaint Tammany29 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997Every severe thunderstorm warning in 1997

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.