Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 64, NWS New Orleans, LA

March 29, 1997Washington Parish, Louisiana; Pearl River County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 29, 1997, 8:15 PM CST for Washington Parish, Louisiana; Pearl River County, Mississippi. It was in force for 45 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Mar 29, 1997, 8:15 PM CST (02:15 UTC)
Expired
Mar 29, 1997, 9:00 PM CST
In force
45 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Washington Parish, LA, Pearl River County, MS

What was reported inside it

TimeReportWhereRemark
Mar 29, 8:20 PM CSTHail 0.75Bogalusa, LA
Mar 29, 8:35 PM CSTHail 1.75Crossroads, MS

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 2.3 hours before the alert went out and 63 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 00:00Z on 1997-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1863 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 00:00Z on 1997-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
1863 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
840 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
79 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNEW 300216 RRA
SVRNEW
LAC117-MSC109-300300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW ORLEANS LA
815 PM CST SAT MAR 29 1997
 
THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  900 PM CST
FOR RESIDENTS IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST LOUISIANA
 
   ...EASTERN WASHINGTON PARISH
 
 
IN SOUTH MISSISSIPPI
 
   ...WESTERN PEARL RIVER COUNTY
 
AT 810 PM CST...RADAR INDICATED A SEVERE THUNDERSTORM LIKELY PRODUCING
LARGE HAIL IN EASTERN WASHINGTON PARISH LOUISIANA...JUST TO THE NORTH
OF BOGALUSA.
 
THIS THUNDERSTORM WAS MOVING TO THE EAST SOUTHEAST AT 20 MPH.
 
COMMUNITIES IN THE PATH OF THIS SEVERE THUNDERSTORM INCLUDE BOGALUSA
LOUISIANA AND CROSSROADS MISSISSIPPI.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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

Local storm report, Mar 29, 7:12 PM CST, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORTS
NATIONAL WEATHER SERVICE NEW ORLEANS LA
715 PM CST SAT MAR 29 1997

TIME(CST)  .....CITY LOCATION......STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION.....

1245 PM    PICAYUNE                   MS   0.75 INCH HAIL
03/29/97   PEARL RIVER                     REPORTED BY PEARL RIVER PD.

0145 PM    LAFITTE                    LA   1.00 INCH HAIL
03/29/97   JEFFERSON                       REPORTED BY TELEVISION
                                           METEOROLOGIST.

0225 PM    JESUIT BEND                LA   1.75 INCH HAIL
03/29/97   PLAQUEMINES                     REPORTED BY PLAQUEMINES
                                           PARISH S.O.

0355 PM    5 NW NEW ORLEANS           LA   1.75 INCH HAIL
03/29/97   ORLEANS                         REPORTED BY TELEVISION
                                           METEOROLOGIST IN LAKE
                                           VISTA PARK AREA. 4

0405 PM    7 NE NEW ORLEANS           LA   1.00 INCH HAIL
03/29/97   ORLEANS                         REPORTED BY OBSERVER AT
                                           LAKEFRONT AIRPORT - KNEW.

03
Local storm report, Mar 29, 7:15 PM CST, 1 hour before
PRELIMINARY LOCAL STORM REPORTS
NATIONAL WEATHER SERVICE NEW ORLEANS LA
715 PM CST SAT MAR 29 1997

TIME(CST)  .....CITY LOCATION......STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION.....

1245 PM    PICAYUNE                   MS   0.75 INCH HAIL
03/29/97   PEARL RIVER                     REPORTED BY PEARL RIVER PD.

0145 PM    LAFITTE                    LA   1.00 INCH HAIL
03/29/97   JEFFERSON                       REPORTED BY TELEVISION
                                           METEOROLOGIST.

0225 PM    JESUIT BEND                LA   1.75 INCH HAIL
03/29/97   PLAQUEMINES                     REPORTED BY PLAQUEMINES
                                           PARISH S.O.

0355 PM    5 NW NEW ORLEANS           LA   1.75 INCH HAIL
03/29/97   ORLEANS                         REPORTED BY TELEVISION
                                           METEOROLOGIST IN LAKE
                                           VISTA PARK AREA.

0405 PM    7 NE NEW ORLEANS           LA   1.00 INCH HAIL
03/29/97   ORLEANS                         REPORTED BY OBSERVER AT
                                           LAKEFRONT AIRPORT - KNEW.

03

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 6:09 PM CSTSevere Thunderstorm WarningLIXWashington36 min
Mar 29, 7:24 PM CSTSevere Thunderstorm WarningLIXWashington51 min
Mar 30, 9:41 AM CSTSevere Thunderstorm WarningLIXTerrebonne64 min
Mar 30, 10:24 AM CSTSevere Thunderstorm WarningLIXJefferson, Saint Charles66 min
Mar 30, 11:06 AM CSTSevere Thunderstorm WarningLIXPlaquemines, Saint Bernard54 min
Mar 29, 8:40 PM CSTSevere Thunderstorm WarningLIXPearl River50 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1997Severe Thunderstorm Warnings in Mississippi, 1997Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.