Alert archive / Louisiana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 404, NWS New Orleans, LA

November 11, 1995Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Nov 11, 1995, 7:00 AM CST for Plaquemines Parish, Louisiana. It was in force for 90 min.

The area

The counties it named.

The facts

Issued: Nov 11, 1995, 7:00 AM CST (13:00 UTC)
Expired: Nov 11, 1995, 8:30 AM CST
In force: 90 min
Issued by: NWS New Orleans, LA
Area: Whole counties

County Plaquemines Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.0 hours before the alert went out and 79 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: 1667 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 303 m²/s²
Significant tornado parameter: 2.6
Supercell composite: 12.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 111304 RRA
SVRNEW
LAC075-111430-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
700 AM CST SAT NOV 11 1995
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 AM CST
FOR RESIDENTS IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST LOUISIANA
 
   ...PLAQUEMINES PARISH
 
AND THE ADJACENT COASTAL WATERS OF SOUTHEAST LOUISIANA.
 
 
AT 700 AM CST...A LINE OF SEVERE THUNDERSTORMS WAS INDICATED BY DOPPLER
RADAR FROM JUST SOUTH OF LAKE BORGNE IN ST BERNARD PARISH ACROSS UPPER
PLAQUEMINES PARISH NEAR IRONTON AND LAKE JUDGE PEREZ. THE THUNDERSTORMS
WERE MOVING SOUTHEAST AT 35 MILES AN HOUR AND WILL REACH THE BURAS AREA
BY 745 AM. WIND GUSTS OF 60 TO 70 MILES AN HOUR ARE LIKELY WITH THIS
LINE OF STORMS.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO ADVANCE WARNING.  REMAIN CALM BUT BE ALERT TO
RAPIDLY CHANGING WEATHER CONDITIONS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 11, 5:14 AM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	39 min
Nov 11, 6:15 AM CST	Severe Thunderstorm Warning	LIX	Jefferson, Orleans	45 min
Nov 11, 6:15 AM CST	Severe Thunderstorm Warning	LIX	Saint Bernard	45 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1995 Every 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.