Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 66, NWS New Orleans, LA

March 13, 1999Pointe Coupee Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 13, 1999, 8:29 AM CST for Pointe Coupee Parish, Louisiana. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 13, 1999, 8:29 AM CST (14:29 UTC)
Expired
Mar 13, 1999, 9:15 AM CST
In force
46 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Pointe Coupee Parish, LA

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Mar 13, 5:00 AM CSTTornado WatchSPC5 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.5 hours before the alert went out and 167 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 12:00Z on 1999-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 759 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 12:00Z on 1999-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 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
759 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
639 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
259 m²/s²
0-3 km storm-relative helicity
311 m²/s²
Significant tornado parameter
1.3
Supercell composite
7.8

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
Mar 13, 8:50 AM CSTTornado WarningLIXPointe Coupee30 min
Mar 13, 9:00 AM CSTSevere Thunderstorm WarningLIXWest Feliciana35 min
Mar 13, 9:38 AM CSTSevere Thunderstorm WarningLIXEast Feliciana, West Feliciana32 min
Mar 13, 10:07 AM CSTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana48 min
Mar 13, 10:23 AM CSTSevere Thunderstorm WarningLIXSaint Helena42 min
Mar 13, 11:01 AM CSTSevere Thunderstorm WarningLIXTangipahoa34 min
Mar 13, 1:07 PM CSTTornado WarningLIXTangipahoa33 min
Mar 13, 1:33 PM CSTTornado WarningLIXWashington32 min
Mar 13, 3:46 PM CSTSevere Thunderstorm WarningLIXSaint Tammany34 min
Mar 13, 4:33 PM CSTSevere Thunderstorm WarningLIXJefferson32 min
Mar 13, 5:40 PM CSTSevere Thunderstorm WarningLIXPlaquemines30 min
Mar 13, 9:58 AM CSTSevere Thunderstorm WarningLIXAmite47 min
Mar 13, 10:13 AM CSTTornado WarningLIXAmite37 min
Mar 13, 11:31 AM CSTSevere Thunderstorm WarningLIXPike34 min
Mar 13, 11:37 AM CSTSevere Thunderstorm WarningLIXWalthall33 min
Mar 13, 12:22 PM CSTFlash Flood WarningLIXPike2 hr
Mar 13, 2:16 PM CSTFlash Flood WarningLIXPike74 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1999Every severe thunderstorm warning in 1999

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.