Alert archive / Louisiana / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 14, NWS New Orleans, LA

February 23, 1994Jefferson Parish, Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Feb 23, 1994, 1:21 PM CST for Jefferson Parish, Plaquemines Parish, Louisiana. It was in force for 69 min.

The area

The counties it named.

The facts

Issued
Feb 23, 1994, 1:21 PM CST (19:21 UTC)
Expired
Feb 23, 1994, 2:30 PM CST
In force
69 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Jefferson Parish, LA, Plaquemines Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 75 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, Slidell Radar S, LA at 12:00Z on 1994-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1149 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, Slidell Radar S, LA at 12:00Z on 1994-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 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
1149 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
592 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Feb 23, 7:30 AM CST, 5 hours 51 minutes before
LAZ038>040-045-046-049>070-LAZ501-LAZ502-231445-

SPECIAL WEATHER STATEMENT AND RADAR STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
730 AM CST WED FEB 23 1994

AT 725 AM A BAND OF RAIN SHOWERS AND THUNDERSTORMS...SOME STRONG
WITH HEAVY RAINFALL WAS OCCURRING FROM VERMILION BAY NORTHEAST BEWTEEN
LAKE MAUREPAS AND BATON ROUGE AND ON NORTHEAST TO BETWEEN MCCOMB MISSISSIPPI
AND BOGALUSA LOUISIANA. ANOTHER NARROWER BAND EXTENDED FROM COVINGTON TO
PICAYUNE MISSISSIPPI AND THEN ACROSS SOUTHEAST MISSISSIPPI TO THE
ALABAMA STATE LINE EAST OF HATTIESBURG. THE STRONGEST STORMS IN SOUTHEAST
LOUISIANA WERE ABOUT 10 MILES NORTHWEST OF HAMMOND AND FROM COVINGTON
LOUISIANA TO PICAYUNE MISSISSIPPI.

THE STRONGER STORMS COULD PRODUCE STRONG GUSTY WINDS...BRIEF HEAVY RAIN
PRODUCING SOME STREET FLOODING...DANGEROUS LIGHTNING AND POSSIBLY SOME
SMALL HAIL.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.
Special weather statement, Feb 23, 8:30 AM CST, 4 hours 51 minutes before
LAZ038>040-045-046-049>070-LAZ501-LAZ502-231600-

SPECIAL WEATHER STATEMENT AND RADAR STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
830 AM CST WED FEB 23 1994

AT 730 AM A LINE OF THUNDERSTORMS...SOME WITH VERY HEAVY RAIN CONTINUED
FROM VERMILION BAY NORTHEAST BETWEEN BATON ROUGE AND LAKE PONTCHARTRAIN
AND CONTINUED NORTHEAST INTO MISSISSIPPI BETWEEN HATTIESBURG AND PASCAGOULA.
 .
THE STRONGER STORMS COULD PRODUCE STRONG GUSTY WINDS...BRIEF HEAVY RAIN
PRODUCING SOME STREET FLOODING...DANGEROUS LIGHTNING AND POSSIBLY SOME
SMALL HAIL.

SCATTERED SHOWERS AND THUNDERSTORMS WERE ALSO OCCURRING OVER SOUTHEAST
LOUISIANA BETWEEN LAFAYETTE AND SIMMESPORT EXTENDING EAST BETWEEN
MCCOMB MISSISSIPPI AND BOGALUSA LOUISIANA.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.
Special weather statement, Feb 23, 9:30 AM CST, 3 hours 51 minutes before
LAZ038>040-045-046-049>070-LAZ501-LAZ502-231700-

SPECIAL WEATHER STATEMENT AND RADAR STATEMENT
NATIONAL WEATHER SERVICE NEW ORLEANS LA
930 AM CST WED FEB 23 1994

AN AREA OF SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY
RAIN CONTINUED OVER SOUTHEAST LOUISIANA BETWEEN SIMMESPORT AND
VERMILION BAY EXTENDING EAST BETWEEN BOGALUSA AND NEW ORLEANS.

THE STRONGER STORMS COULD PRODUCE STRONG GUSTY WINDS...HEAVY RAIN
...SOME STREET FLOODING...DANGEROUS LIGHTNING AND POSSIBLY SOME
SMALL HAIL.

SCATTERED SHOWERS AND THUNDERSTORMS...SOME STRONG WERE ALSO
OCCURRING OVER THE COASTAL WATERS 30 TO 50 MILES SOUTH OF
BOOTHVILLE EXTENDING EAST FOR ABOUT 60 MILES.

SCATTERED SHOWERS WERE OCCURRING OVER SOUTHERN MISSISSIPPI AND
EXTREME SOUTHWEST ALABAMA.

THE THUNDERSTORMS WERE MOVING NORTHEAST AT 35 MILES AN HOUR.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 23, 12:49 PM CSTSevere Thunderstorm WarningLIXLafourche, Terrebonne56 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1994Every severe thunderstorm warning in 1994

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.