Alert archive / Louisiana / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 128, NWS New Orleans, LA

April 29, 1996Saint John the Baptist Parish, Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 29, 1996, 11:43 AM CDT for Saint John the Baptist Parish, Tangipahoa Parish, Louisiana. It was in force for 47 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
Apr 29, 1996, 11:43 AM CDT (16:43 UTC)
Expired
Apr 29, 1996, 12:30 PM CDT
In force
47 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Saint John the Baptist Parish, LA, Tangipahoa Parish, LA

What was reported inside it

TimeReportWhereRemark
Apr 29, 11:50 AM CDTThunderstorm WindPonchatoula, LA
Apr 29, 11:50 AM CDTThunderstorm WindLoranger, LA

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 12:00Z, 4.7 hours before the alert went out and 72 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 1996-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1540 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 1996-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 square meters per square second.193958Sfc1 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
1540 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.2

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 10:14 AM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, Iberville, West Baton Rouge61 min
Apr 29, 11:12 AM CDTSevere Thunderstorm WarningLIXAscension, Livingston48 min
Apr 29, 12:02 PM CDTSevere Thunderstorm WarningLIXSaint Tammany58 min
Apr 29, 12:16 PM CDTSevere Thunderstorm WarningLIXWashington44 min
Apr 29, 1:28 PM CDTSevere Thunderstorm WarningLIXOrleans, Saint Tammany47 min
Apr 29, 9:19 AM CDTTornado WarningLIXHancock, Harrison26 min
Apr 29, 11:50 AM CDTSevere Thunderstorm WarningLIXHarrison40 min
Apr 29, 12:35 PM CDTSevere Thunderstorm WarningLIXPearl River40 min
Apr 29, 1:28 PM CDTSevere Thunderstorm WarningLIXHancock47 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1996Every severe thunderstorm warning in 1996

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.