Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 34, NWS New Orleans, LA

January 24, 1997Lafourche Parish, Saint Charles Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jan 24, 1997, 7:29 PM CST for Lafourche Parish, Saint Charles Parish, Louisiana. It was in force for 46 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: Jan 24, 1997, 7:29 PM CST (01:29 UTC)
Expired: Jan 24, 1997, 8:15 PM CST
In force: 46 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Lafourche Parish, LA, Saint Charles Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 1.5 hours before the alert went out and 89 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: 2070 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 98 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 7.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 250128 RRA
SVRNEW
LAC057-089-250215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
729 PM CST FRI JAN 24 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM CST
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...NORTHERN LAFOURCHE PARISH...ST. CHARLES PARISH
 
 
AT 725 PM RADAR INDICATED A SEVERE THUNDERSTORM IN THE VICINITY OF
THIBODAUX. THE THUNDESTORM WAS MOVING NORTHEAST AROUND 25 MILES AN
HOURS. COMMUNITIES IN THE PATH OF THIS THUNDERSTORM INCLUDE DES ALLEMAND
AND PARADIS. THIS THUNDERSTORM WILL LIKELY CONTAIN LARGE HAIL.
 
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 AR,EAS WHERE WATER COVERS THE ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 24, 11:18 PM CST	Severe Thunderstorm Warning	LIX	Lafourche	27 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997 Every 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.