Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 39, NWS New Orleans, LA

March 2, 1999Walthall County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 2, 1999, 9:29 PM CST for Walthall County, Mississippi. It was in force for 61 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 2, 1999, 9:29 PM CST (03:29 UTC)
Expired
Mar 2, 1999, 10:30 PM CST
In force
61 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Walthall County, MS

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 2, 9:15 PM CSTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 3.5 hours before the alert went out and 107 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 1999-03-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 698 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 1999-03-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
698 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
984 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

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 2, 8:25 PM CSTSevere Thunderstorm WarningLIXWest Feliciana60 min
Mar 2, 8:25 PM CSTSevere Thunderstorm WarningLIXPointe Coupee60 min
Mar 2, 9:23 PM CSTSevere Thunderstorm WarningLIXEast Feliciana, Saint Helena47 min
Mar 2, 9:38 PM CSTSevere Thunderstorm WarningLIXTangipahoa, Washington47 min
Mar 2, 9:47 PM CSTSevere Thunderstorm WarningLIXEast Baton Rouge28 min
Mar 2, 9:54 PM CSTSevere Thunderstorm WarningLIXLivingston46 min
Mar 2, 10:07 PM CSTSevere Thunderstorm WarningLIXAscension, Assumption48 min
Mar 2, 10:34 PM CSTSevere Thunderstorm WarningLIXLafourche, Saint James, Saint John the Baptist46 min
Mar 2, 10:34 PM CSTSevere Thunderstorm WarningLIXTerrebonne46 min
Mar 2, 10:40 PM CSTSevere Thunderstorm WarningLIXLivingston35 min
Mar 2, 11:05 PM CSTSevere Thunderstorm WarningLIXLafourche, Saint Charles45 min
Mar 2, 11:26 PM CSTSevere Thunderstorm WarningLIXJefferson, Orleans, Plaquemines49 min
Mar 2, 11:37 PM CSTSevere Thunderstorm WarningLIXSaint Bernard53 min
Mar 2, 11:51 PM CSTTornado WarningLIXPlaquemines, Saint Bernard29 min
Mar 3, 12:08 AM CSTSevere Thunderstorm WarningLIXTerrebonne37 min
Mar 3, 12:23 AM CSTSevere Thunderstorm WarningLIXPlaquemines32 min
Mar 3, 12:25 AM CSTTornado WarningLIXSaint Bernard25 min
Mar 2, 8:50 PM CSTSevere Thunderstorm WarningLIXAmite40 min
Mar 2, 9:14 PM CSTSevere Thunderstorm WarningLIXPike31 min
Mar 2, 10:56 PM CSTTornado WarningLIXHancock, Pearl River34 min
Mar 2, 11:57 PM CSTSevere Thunderstorm WarningLIXJackson33 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 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.