Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 32, NWS New Orleans, LA

November 15, 1987Avoyelles Parish, Catahoula Parish, Concordia Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Nov 15, 1987, 10:45 PM CST for Avoyelles Parish, Catahoula Parish, Concordia Parish, Louisiana. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Nov 15, 1987, 10:45 PM CST (04:45 UTC)
Expired
Nov 15, 1987, 11:45 PM CST
In force
60 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Avoyelles Parish, LA, Catahoula Parish, LA, Concordia 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.8 hours before the alert went out and 193 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, Lake Charles Mun, LA at 00:00Z on 1987-11-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2220 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, Lake Charles Mun, LA at 00:00Z on 1987-11-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 172 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
2220 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
550 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
172 m²/s²
0-3 km storm-relative helicity
239 m²/s²
Significant tornado parameter
2.3
Supercell composite
12.8

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
Nov 16, 12:00 AM CSTSevere Thunderstorm WarningLIXCatahoula, Concordia60 min
Nov 16, 8:15 AM CSTFlash Flood WarningLIXCatahoula4 hr
Nov 16, 12:20 PM CSTSevere Thunderstorm WarningLIXAvoyelles, Saint Landry70 min
Nov 16, 12:40 PM CSTFlash Flood WarningLIXCatahoula, Concordia4 hr
Nov 16, 12:55 PM CSTSevere Thunderstorm WarningLIXConcordia, Pointe Coupee, West Feliciana65 min
Nov 16, 12:55 PM CSTSevere Thunderstorm WarningLIXIberville65 min
Nov 16, 2:15 PM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Iberville, West Baton Rouge60 min
Nov 16, 2:52 PM CSTSevere Thunderstorm WarningLIXLivingston, Saint Helena53 min
Nov 16, 2:52 PM CSTSevere Thunderstorm WarningLIXAscension53 min
Nov 16, 3:02 PM CSTSevere Thunderstorm WarningLIXAssumption, Iberia, Saint Martin, St. Mary58 min
Nov 16, 3:50 PM CSTSevere Thunderstorm WarningLIXAscension, Livingston40 min
Nov 16, 4:37 PM CSTTornado WarningLIXWashington68 min
Nov 16, 5:52 PM CSTTornado WarningLIXLafourche, Saint Charles68 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1987Every severe thunderstorm warning in 1987

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.