Alert archive / Louisiana / Tornado Watches in 1999

Tornado Watch 154

April 14, 199924 counties in Arkansas; 28 parishes in Louisiana; 12 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Apr 14, 1999, 4:00 PM CDT for 24 counties in Arkansas; 28 parishes in Louisiana; 12 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 14, 1999, 4:00 PM CDT (21:00 UTC)
Expired
Apr 14, 1999, 10:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 64 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Sevier County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Franklin County, MS, Issaquena County, MS, Jefferson County, MS, Lincoln County, MS, Pike County, MS, Sharkey County, MS, Warren County, MS, Washington County, MS, Wilkinson County, MS

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 14, 4:25 PM CDTSevere Thunderstorm WarningSHVOuachita65 min
Apr 14, 4:44 PM CDTSevere Thunderstorm WarningJANMorehouse, Richland31 min
Apr 14, 5:01 PM CDTSevere Thunderstorm WarningJANRichland34 min
Apr 14, 5:27 PM CDTSevere Thunderstorm WarningJANChicot33 min
Apr 14, 5:36 PM CDTSevere Thunderstorm WarningJANEast Carroll, Madison34 min
Apr 14, 5:38 PM CDTTornado WarningJANWest Carroll32 min
Apr 14, 5:41 PM CDTTornado WarningJANEast Carroll34 min
Apr 14, 5:52 PM CDTSevere Thunderstorm WarningJANIssaquena48 min
Apr 14, 6:00 PM CDTTornado WarningJANIssaquena35 min
Apr 14, 6:05 PM CDTTornado WarningJANSharkey35 min
Apr 14, 6:53 PM CDTSevere Thunderstorm WarningLZKDallas47 min
Apr 14, 7:15 PM CDTSevere Thunderstorm WarningJANMorehouse35 min
Apr 14, 7:19 PM CDTSevere Thunderstorm WarningJANAshley36 min
Apr 14, 7:24 PM CDTSevere Thunderstorm WarningJANClaiborne36 min
Apr 14, 8:05 PM CDTSevere Thunderstorm WarningJANEast Carroll, West Carroll35 min
Apr 14, 8:35 PM CDTSevere Thunderstorm WarningJANIssaquena35 min
Apr 14, 9:04 PM CDTSevere Thunderstorm WarningJANSharkey, Washington36 min
Apr 14, 9:27 PM CDTSevere Thunderstorm WarningJANEast Carroll33 min

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.0 hours before the alert went out and 207 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 12:00Z on 1999-04-14Temperature 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 12:00Z on 1999-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 156 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
1238 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
156 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 14, 10:00 AM CDTTornado WatchSPCAshley, Bradley, Calhoun, Columbia, Drew, Hempstead and 5 more6 hr
Apr 14, 6:30 PM CDTTornado WatchSPCPhillips6 hr

Nearby

Tornado Watches in Louisiana, 1999Tornado Watches in Arkansas, 1999Tornado Watches in Mississippi, 1999Every tornado watch 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.