Alert archive / Louisiana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 430, NWS New Orleans, LA

December 18, 1995Jefferson Parish, Orleans Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Dec 18, 1995, 5:04 PM CST for Jefferson Parish, Orleans Parish, Louisiana. It was in force for 56 min.

The area

The counties it named.

The facts

Issued: Dec 18, 1995, 5:04 PM CST (23:04 UTC)
Expired: Dec 18, 1995, 6:00 PM CST
In force: 56 min
Issued by: NWS New Orleans, LA
Area: Whole counties

Counties Jefferson Parish, LA, Orleans Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 11.1 hours before the alert went out and 51 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: 11 J/kg
Mixed-layer CIN: -240 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 487 m²/s²
0-3 km storm-relative helicity: 777 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 182305 RRA
SVRNEW
LAC051-071-LAZ501-190000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
504 PM CST MON DEC 18 1995
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  600 PM CST
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...NORTHERN JEFFERSON PARISH...ORLEANS PARISH
 
  AND FOR MARINE INTERESTS IN THE COASTAL WATERS FROM...
 
   ...LAKE PONTCHARTRAIN  TO  LAKE BORGNE
 
AT 500 PM CST...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING
FROM NEAR LAPLACE TO WESTERN LAKE PONTCHARTRAIN.
 
THESE THUNDERSTORMS WERE MOVING TO THE EAST NORTHEAST AT 40 MPH.
 
THE CITIES TO NEW ORLEANS AND METAIRIE ARE IN THE PATH OF THESE STORMS.
 
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA.  REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITlH 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
Dec 18, 9:15 AM CST	Tornado Warning	LIX	East Feliciana	30 min
Dec 18, 10:06 AM CST	Severe Thunderstorm Warning	LIX	Lafourche, Terrebonne	39 min
Dec 18, 10:58 AM CST	Severe Thunderstorm Warning	LIX	Saint James	32 min
Dec 18, 11:10 AM CST	Severe Thunderstorm Warning	LIX	Saint John the Baptist	50 min
Dec 18, 11:13 AM CST	Severe Thunderstorm Warning	LIX	Iberville, West Baton Rouge	47 min
Dec 18, 11:20 AM CST	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Livingston	40 min
Dec 18, 12:11 PM CST	Severe Thunderstorm Warning	LIX	Livingston	34 min
Dec 18, 12:48 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Tangipahoa, Washington	57 min
Dec 18, 1:40 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	50 min
Dec 18, 2:10 PM CST	Severe Thunderstorm Warning	LIX	Lafourche, Saint Charles	50 min
Dec 18, 2:15 PM CST	Severe Thunderstorm Warning	LIX	Terrebonne	30 min
Dec 18, 2:43 PM CST	Severe Thunderstorm Warning	LIX	Jefferson, Orleans	62 min
Dec 18, 3:01 PM CST	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Terrebonne	44 min
Dec 18, 3:05 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany	40 min
Dec 18, 3:44 PM CST	Severe Thunderstorm Warning	LIX	Assumption, Lafourche, Saint James, Terrebonne	61 min
Dec 18, 4:25 PM CST	Severe Thunderstorm Warning	LIX	Saint Charles, Saint John the Baptist	50 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.