Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 11, NWS New Orleans, LA

March 29, 1990Ascension Parish, East Baton Rouge Parish, East Feliciana Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 29, 1990, 9:43 PM CST for Ascension Parish, East Baton Rouge Parish, East Feliciana Parish, Louisiana. It was in force for 62 min.

The area

The counties it named.

The facts

Issued
Mar 29, 1990, 9:43 PM CST (03:43 UTC)
Expired
Mar 29, 1990, 10:45 PM CST
In force
62 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Ascension Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.7 hours before the alert went out and 130 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 1990-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 16 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 1990-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 78 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
16 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
1008 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
78 m²/s²
0-3 km storm-relative helicity
158 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 8:06 PM CSTSevere Thunderstorm WarningLIXIberia, Saint Martin, St. Mary69 min
Mar 29, 8:24 PM CSTSevere Thunderstorm WarningLIXSaint Landry51 min
Mar 29, 8:58 PM CSTSevere Thunderstorm WarningLIXIberville, Pointe Coupee62 min
Mar 29, 9:17 PM CSTSevere Thunderstorm WarningLIXAssumption, Lafourche, Saint James, Terrebonne58 min
Mar 29, 9:25 PM CSTSevere Thunderstorm WarningLIXWest Baton Rouge, West Feliciana65 min
Mar 29, 10:11 PM CSTSevere Thunderstorm WarningLIXLivingston, Saint Helena64 min
Mar 29, 10:17 PM CSTSevere Thunderstorm WarningLIXLafourche, Saint Charles, Saint John the Baptist58 min
Mar 29, 10:17 PM CSTSevere Thunderstorm WarningLIXTerrebonne58 min
Mar 29, 10:34 PM CSTTornado WarningLIXLafourche26 min
Mar 29, 10:44 PM CSTTornado WarningLIXJefferson, Saint Charles61 min
Mar 29, 10:56 PM CSTTornado WarningLIXOrleans64 min
Mar 29, 11:24 PM CSTTornado WarningLIXSaint Tammany66 min
Mar 30, 12:22 AM CSTTornado WarningLIXSaint Tammany48 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm warning in 1990

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.