Alert archive / Louisiana / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 381, NWS Jackson, MS

May 5, 1999Richland Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at May 5, 1999, 12:56 AM CDT for Richland Parish, Louisiana. It was in force for 34 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
May 5, 1999, 12:56 AM CDT (05:56 UTC)
Expired
May 5, 1999, 1:30 AM CDT
In force
34 min
Issued by
NWS Jackson, MS
Area
Whole counties

County Richland Parish, LA

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 5.9 hours before the alert went out and 187 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, Shreveport, LA at 00:00Z on 1999-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3185 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, Shreveport, LA at 00:00Z on 1999-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 267 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
3185 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
558 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
267 m²/s²
0-3 km storm-relative helicity
270 m²/s²
Significant tornado parameter
5.4
Supercell composite
17.9

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 Jackson, MS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 1:45 AM CDTSevere Thunderstorm WarningJANIssaquena, Warren35 min
May 5, 8:43 AM CDTSevere Thunderstorm WarningJANWashington32 min
May 5, 9:11 AM CDTSevere Thunderstorm WarningJANBolivar, Sunflower49 min
May 5, 4:28 PM CDTSevere Thunderstorm WarningJANSunflower32 min
May 5, 4:42 PM CDTSevere Thunderstorm WarningJANLeflore48 min
May 5, 5:35 PM CDTSevere Thunderstorm WarningJANBolivar50 min
May 5, 5:36 PM CDTSevere Thunderstorm WarningJANWashington49 min
May 5, 6:03 PM CDTSevere Thunderstorm WarningJANIssaquena47 min
May 5, 6:07 PM CDTSevere Thunderstorm WarningJANSunflower48 min
May 5, 6:15 PM CDTTornado WarningJANIssaquena50 min
May 5, 6:17 PM CDTSevere Thunderstorm WarningJANLeflore48 min
May 5, 6:20 PM CDTTornado WarningJANSharkey50 min
May 5, 6:22 PM CDTSevere Thunderstorm WarningJANWashington33 min
May 5, 6:26 PM CDTTornado WarningJANLeflore49 min
May 5, 6:30 PM CDTTornado WarningJANSunflower50 min
May 5, 6:33 PM CDTSevere Thunderstorm WarningJANYazoo52 min
May 5, 6:39 PM CDTTornado WarningJANHumphreys51 min
May 5, 6:47 PM CDTTornado WarningJANYazoo48 min
May 5, 6:58 PM CDTSevere Thunderstorm WarningJANHolmes47 min
May 5, 6:59 PM CDTSevere Thunderstorm WarningJANIssaquena, Sharkey51 min
May 5, 12:15 AM CDTSevere Thunderstorm WarningJANMorehouse50 min
May 5, 1:30 AM CDTSevere Thunderstorm WarningJANMadison35 min
May 5, 4:50 PM CDTSevere Thunderstorm WarningJANMorehouse35 min
May 5, 5:54 PM CDTSevere Thunderstorm WarningJANEast Carroll51 min
May 5, 5:57 PM CDTSevere Thunderstorm WarningJANRichland48 min
May 5, 6:42 PM CDTTornado WarningJANEast Carroll, Richland, West Carroll48 min
May 5, 6:54 PM CDTSevere Thunderstorm WarningJANRichland51 min
May 5, 7:22 AM CDTSevere Thunderstorm WarningJANAshley33 min
May 5, 7:56 AM CDTSevere Thunderstorm WarningJANAshley49 min
May 5, 8:20 AM CDTSevere Thunderstorm WarningJANChicot35 min
May 5, 4:59 PM CDTSevere Thunderstorm WarningJANAshley46 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.