Alert archive / Louisiana / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 10, NWS New Orleans, LA

March 25, 1993Saint Helena Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 25, 1993, 11:58 AM CST for Saint Helena Parish, Louisiana. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Mar 25, 1993, 11:58 AM CST (17:58 UTC)
Expired
Mar 25, 1993, 1:00 PM CST
In force
62 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Saint Helena Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.0 hours before the alert went out and 116 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 1993-03-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 1993-03-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
628 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, Mar 25, 10:06 AM CST, 1 hour 52 minutes before
LAZ006-008-009-MSZ010-011-251800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1005 AM CST THU MAR 25 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EAST CENTRAL LOUISIANA
UNTIL 4 PM CST THIS AFTERNOON...

RADAR SHOWED VERY STRONG THUNDERSTORMS NEAR ALEXANDRIA AND POLLOCK.  THE
THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MPH AND WILL ENTER SOUTHERN
CATAHOULA AND NORTHERN AVOYELLES PARISHES SHORTLY.  ELSEWHERE RAIN AND
A FEW THUNDERSTORMS CONTINUED MOVING ACROSS SOUTHERN MISSISSIPPI...WITH
THUNDERSTORMS DEVELOPING ALONG THE COAST SOUTH OF LAFAYETTE.

PEOPLE IN EAST CENTRAL LOUISIANA SHOULD BE ALERT TO POSSIBLE SEVERE
THUNDERSTORMS DEVELOPING RAPIDLY AND MOVE TO A S*AFE PLACE IF NEEDED.
Special weather statement, Mar 25, 10:44 AM CST, 1 hour 14 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-251800-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1043 AM CST THU MAR 25 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 4 PM CST FOR
   ALL PARISHES IN SOUTHEAST LOUISIANA...

AT 1030 AM CST...RADAR INDICATED AN ISOLATED STRONG THUNDERSTORM
LOCATED JUST SOUTH OF COLUMBIA MISSISSIPPI MOVING SOUTHEAST AT
ABOUT 35 MILES AN HOUR.  THIS THUNDERSTORM WAS WITHIN AN AREA OF
MOSTLY LIGHT RAIN OCCURRING IN SOUTH MISSISSIPPI FROM LAUREL TO
TYLERTOWN EAST TO THE MISSISSIPPI/ALABAMA BORDER.

A CLUSTER OF THUNDERSTORMS WAS LOCATED IN AND AROUND THE ALEXANDRIA
LOUISIANA AREA.  MOVEMENT WAS SOUTHEAST AT ABOUT 35 MILES AN HOUR.
THESE THUNDERSTORMS WILL AFFECT EXTREME SOUTHWEST MISSISSIPPI AND
THE SIMMESPORT LOUISIANA AREA WITHIN THE HOUR.

AN AREA OF SHOWERS AND THUNDERSTORMS WAS OVER THE LOUISIANA COASTAL
WATERS FROM 40 MILES SOUTHWEST OF VERMILION BAY EAST TO 50 MILES EAST
OF THE MOUTH OF THE MISSISSIPPI RIVER.  MOVEMENT WAS EAST AT 35 MILES
AN HOUR.
Special weather statement, Mar 25, 10:58 AM CST, 1 hour before
LAZ006-008-009-251900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1100 AM CST THU MAR 25 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EAST CENTRAL LOUISIANA
UNTIL 4 PM CST THIS AFTERNOON...

RADAR SHOWED VERY STRONG THUNDERSTORMS MOVING THROUGH SOUTHERN CONCORDIA
AND NORTHERN AVOYELLES PARISHES FROM MARKSVILLE TO ACME.  THE
THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MPH.  EARLIER HAIL TO MARBLE
SIZE WAS REPORTED WITH THESE THUNDERSTORMS.  ELSEWHERE THUNDERSTORMS
CONTINUED ALONG THE COAST SOUTH OF LAFAYETTE TO NEAR THE MOUTH OF THE
MISSISSIPPI RIVER.

PEOPLE IN EAST CENTRAL LOUISIANA SHOULD BE ALERT TO POSSIBLE SEVERE
THUNDERSTORMS DEVELOPING RAPIDLY AND MOVE TO A SAFE PLACE IF NEEDED.
Special weather statement, Mar 25, 11:40 AM CST, 18 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-251900-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1139 AM CST THU MAR 25 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 4 PM CST FOR
   ALL PARISHES IN SOUTHEAST LOUISIANA...

AT 1125 AM CST...RADAR INDICATED A CLUSTER OF THUNDERSTORMS IN EXTREME
SOUTHWEST MISSISSIPPI NEAR NATCHEZ AND EXTENDED SOUTH TO BETWEEN SIMMESPORT
AND 20 MILES NORTHWEST OF BATON ROUGE LOUISIANA.  MOVEMENT WAS SOUTHEAST
AT 35 MILES AN HOUR AND THE BATON ROUGE AREA WILL BE AFFECTED WITHIN
ABOUT 30 TO 45 MILES AN HOUR.

OTHER SHOWERS AND THUNDERSTORMS WERE OVE EXTREME SOUTHEAST MISSISSIPPI
AND SOUTHWEST ALABAMA BETWEEN HATTIESBURG AND GULFPORT MISSISSIPPI AND
MOBILE ALABAMA.  THESE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST
ABOUT 35 MILES AN HOUR.

AN AREA OF SHOWERS AND THUNDERSTORMS WAS OVER THE LOUISIANA COASTAL
WATERS FROM SOUTHWEST OF VERMILION BAY EAST TO THE MOUTVH OF THE
MISSISSIPPI RIVER.  MOVEMENT WAS EAST AT 35 MILES AN HOUR.
Special weather statement, Mar 25, 11:43 AM CST, 15 minutes before
LAZ008>010-012>014-MSZ010>014-ALZ016-251900-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY  ...CORRECTED FOR WORDING...
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1139 AM CST THU MAR 25 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 4 PM CST FOR
   ALL PARISHES IN SOUTHEAST LOUISIANA...

AT 1125 AM CST...RADAR INDICATED A CLUSTER OF THUNDERSTORMS IN EXTREME
SOUTHWEST MISSISSIPPI NEAR NATCHEZ AND EXTENDED SOUTH TO BETWEEN SIMMESPORT
AND 20 MILES NORTHWEST OF BATON ROUGE LOUISIANA.  MOVEMENT WAS SOUTHEAST
AT 35 MILES AN HOUR AND THE BATON ROUGE AREA WILL BE AFFECTED WITHIN
ABOUT 30 TO 45 MINUTES.

OTHER SHOWERS AND THUNDERSTORMS WERE OVER EXTREME SOUTHEAST MISSISSIPPI
AND SOUTHWEST ALABAMA BETWEEN HATTIESBURG AND GULFPORT MISSISSIPPI AND
MOBILE ALABAMA.  THESE SHOWERS AND THUNDERSTORMS WERE MOVING SOUTHEAST
ABOUT 35 MILES AN HOUR.

AN AREA OF SHOWERS AND THUNDERSTORMS WAS OVER THE LOUISIANA COASTAL
WATERS FROM SOUTHWEST OF VEPRMILION BAY EAST TO THE MOUTH OF THE
MISSISSIPPI RIVER.  MOVEMENT WAS EAST AT 35 MILES AN HOUR.
Special weather statement, Mar 25, 11:53 AM CST, 5 minutes before
LAZ006-008-009-MSZ010-011-251900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1150 AM CST THU MAR 25 1993

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR EAST CENTRAL LOUISIANA
AND SOUTHWEST MISSISSIPPI UNTIL 4 PN CST THIS AFTERNOON...

RADAR SHOWED VERY STRONG THUNDERSTORMS CONTINUED MOVING ALONG THE
LOUISIANA MISSISSIPPI BORDER FROM CLINTON TO NEAR LIBERTY MISSISSIPPI.
THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 30 MPH.  THESE THUNDERSTORMS
HAVE PRODUCED HAIL TO MARBLE SIZE AS THEY MOVE ALONG.  ELSEWHERE
RAIN AND THUNDERSTORMS CONTINUED ALONG THE COAST SOUTH OF LAFAYETTE TO
HOUMA.

PEOPLE IN EAST CENTRAL LOUISIANA SHOULD BE ALERT TO POSSIBLE SEVERE
THUNDERSTORMS DElVELOPING RAPIDLY AND MOVE TO A SAFE PLACE IF NEEDED.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 25, 11:58 AM CSTSevere Thunderstorm WarningLIXEast Feliciana37 min
Mar 25, 12:08 PM CSTSevere Thunderstorm WarningLIXTangipahoa52 min
Mar 25, 12:26 PM CSTSevere Thunderstorm WarningLIXSaint Tammany, Washington64 min
Mar 25, 1:40 PM CSTSevere Thunderstorm WarningLIXSaint Tammany, Washington65 min
Mar 25, 2:44 PM CSTSevere Thunderstorm WarningLIXSaint Tammany31 min
Mar 25, 3:06 PM CSTSevere Thunderstorm WarningLIXConcordia39 min
Mar 25, 4:04 PM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, Livingston, Saint Helena56 min
Mar 25, 4:31 PM CSTSevere Thunderstorm WarningLIXTangipahoa59 min
Mar 25, 5:08 PM CSTSevere Thunderstorm WarningLIXTangipahoa, Washington37 min
Mar 25, 5:44 PM CSTSevere Thunderstorm WarningLIXEast Feliciana, Saint Helena61 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1993Every severe thunderstorm warning in 1993

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.