Alert archive / Louisiana / Tornado Warnings in 1997

Tornado Warning 2, NWS New Orleans, LA

April 11, 1997Jefferson Parish, Lafourche Parish, Louisiana

NWS New Orleans, LA issued this tornado warning at Apr 11, 1997, 11:26 AM CDT for Jefferson Parish, Lafourche Parish, Louisiana. It was in force for 34 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 11, 1997, 11:26 AM CDT (16:26 UTC)
Expired: Apr 11, 1997, 12:00 PM CDT
In force: 34 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Jefferson Parish, LA, Lafourche Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 11, 10:15 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.4 hours before the alert went out and 290 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: 723 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 601 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 137 m²/s²
0-3 km storm-relative helicity: 205 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 111627 RRA
TORNEW
LAC051-057-111700-
 
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1126 AM CDT FRI APR 11 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL NOON CDT
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...JEFFERSON PARISH...SOUTHERN LAFOURCHE PARISH
 
AND THE ADJACENT COASTAL WATERS
 
 
AT 1120 AM LOUISIANA STATE POLICE IN GRAY REPORTED A TORNADO HAD TOUCHED
DOWN IN GALLIANO AROUND 1115 AM WITH DAMAGE TO PROPERTY. THE TORNADO
THAT SPAWNED THE TORNADO WAS MOVING NORTHEAST AROUND 35 MILES AN HOUR.
COMMUNTIES IN THE PATH OF THIS TORNADO INCLUDE LAFITTE.
 
 
THIS IS A DANGEROUS STORM SITUATION.  ACT QUICKLY.  IF YOU ARE
IN THE PATH OF THIS TORNADO MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE. OTHERWISE..GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR POSSIBLE.  AVOID WINDOWS.  ABANDON CARS AND MOBILE HOMES
FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
 
 
 
&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 9:29 AM CDT	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Saint James	46 min
Apr 11, 9:36 AM CDT	Severe Thunderstorm Warning	LIX	Terrebonne	69 min
Apr 11, 10:14 AM CDT	Severe Thunderstorm Warning	LIX	Lafourche, Saint James, Saint John the Baptist	46 min
Apr 11, 10:27 AM CDT	Severe Thunderstorm Warning	LIX	Lafourche	48 min
Apr 11, 10:45 AM CDT	Severe Thunderstorm Warning	LIX	Saint Charles	45 min
Apr 11, 11:00 AM CDT	Flash Flood Warning	LIX	Assumption	4 hr
Apr 11, 11:09 AM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Orleans, Plaquemines	66 min
Apr 11, 11:09 AM CDT	Severe Thunderstorm Warning	LIX	Saint Bernard	66 min
Apr 11, 11:31 AM CDT	Severe Thunderstorm Warning	LIX	Tangipahoa	44 min
Apr 11, 11:49 AM CDT	Tornado Warning	LIX	Saint Tammany, Tangipahoa	26 min
Apr 11, 12:12 PM CDT	Tornado Warning	LIX	Saint Tammany, Tangipahoa	33 min
Apr 11, 12:17 PM CDT	Severe Thunderstorm Warning	LIX	Orleans, Plaquemines, Saint Bernard	43 min
Apr 11, 12:32 PM CDT	Severe Thunderstorm Warning	LIX	Washington	43 min
Apr 11, 12:59 PM CDT	Severe Thunderstorm Warning	LIX	Plaquemines, Saint Bernard	46 min

Nearby

Tornado Warnings in Louisiana, 1997 Every tornado warning in 1997 Tornadoes 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.