Alert archive / Mississippi / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 1, NWS New Orleans, LA

January 2, 1999Wilkinson County, Mississippi

NWS New Orleans, LA issued this severe thunderstorm warning at Jan 2, 1999, 4:29 AM CST for Wilkinson County, Mississippi. It was in force for 31 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
Jan 2, 1999, 4:29 AM CST (10:29 UTC)
Expired
Jan 2, 1999, 5:00 AM CST
In force
31 min
Issued by
NWS New Orleans, LA
Area
Whole counties

County Wilkinson County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 10.5 hours before the alert went out and 174 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, Jackson, MS at 00:00Z on 1999-01-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Jackson, MS at 00:00Z on 1999-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 339 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
540 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
339 m²/s²
0-3 km storm-relative helicity
474 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
Jan 2, 4:38 AM CSTTornado WarningLIXPointe Coupee32 min
Jan 2, 4:49 AM CSTTornado WarningLIXWest Feliciana31 min
Jan 2, 5:36 AM CSTTornado WarningLIXEast Feliciana, Saint Helena34 min
Jan 2, 6:26 AM CSTTornado WarningLIXTangipahoa, Washington34 min
Jan 2, 6:56 AM CSTSevere Thunderstorm WarningLIXLafourche, Saint Charles, Saint John the Baptist34 min
Jan 2, 7:05 AM CSTTornado WarningLIXSaint Charles, Saint John the Baptist30 min
Jan 2, 7:53 AM CSTSevere Thunderstorm WarningLIXSaint Tammany32 min
Jan 2, 8:09 AM CSTTornado WarningLIXSaint Tammany16 min
Jan 2, 8:54 AM CSTSevere Thunderstorm WarningLIXPlaquemines21 min
Jan 2, 6:26 AM CSTTornado WarningLIXWalthall34 min
Jan 2, 8:13 AM CSTTornado WarningLIXHancock32 min
Jan 2, 8:37 AM CSTTornado WarningLIXHarrison33 min
Jan 2, 9:12 AM CSTSevere Thunderstorm WarningLIXHarrison, Jackson33 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.