Alert archive / Louisiana / Tornado Watches in 1999

Tornado Watch 10

January 8, 19995 counties in Arkansas; 20 parishes in Louisiana; 15 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Jan 8, 1999, 3:00 PM CST for 5 counties in Arkansas; 20 parishes in Louisiana; 15 counties in Mississippi. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jan 8, 1999, 3:00 PM CST (21:00 UTC)
Expired
Jan 8, 1999, 8:00 PM CST
In force
5 hr
Issued by
the Storm Prediction Center
All 40 counties

Ashley County, AR, Bradley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Bienville Parish, LA, Caldwell Parish, LA, Catahoula 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, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Union Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Coahoma County, MS, Grenada County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Pontotoc County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Washington County, MS, Yalobusha County, MS

The radar

The Shreveport radar (KSHV), 149 km from the middle of the area, began a volume at 21:04 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jan 8, 3:12 PM CSTSevere Thunderstorm WarningJANMorehouse33 min
Jan 8, 3:22 PM CSTSevere Thunderstorm WarningJANWest Carroll33 min
Jan 8, 3:26 PM CSTTornado WarningJANWest Carroll34 min
Jan 8, 3:43 PM CSTTornado WarningJANMorehouse47 min
Jan 8, 3:47 PM CSTTornado WarningJANChicot33 min
Jan 8, 4:03 PM CSTTornado WarningJANIssaquena32 min
Jan 8, 4:08 PM CSTSevere Thunderstorm WarningJANWashington37 min
Jan 8, 4:23 PM CSTTornado WarningJANSharkey32 min
Jan 8, 4:26 PM CSTTornado WarningJANRichland, West Carroll34 min
Jan 8, 4:44 PM CSTSevere Thunderstorm WarningJANWashington36 min
Jan 8, 4:51 PM CSTTornado WarningJANSharkey34 min
Jan 8, 4:58 PM CSTTornado WarningJANEast Carroll32 min
Jan 8, 5:07 PM CSTTornado WarningJANHumphreys48 min
Jan 8, 5:24 PM CSTSevere Thunderstorm WarningJANIssaquena36 min
Jan 8, 5:45 PM CSTSevere Thunderstorm WarningLZKDrew65 min
Jan 8, 5:51 PM CSTSevere Thunderstorm WarningJANSharkey34 min
Jan 8, 5:58 PM CSTTornado WarningJANMorehouse47 min
Jan 8, 6:14 PM CSTTornado WarningJANCarroll51 min
Jan 8, 6:17 PM CSTSevere Thunderstorm WarningJANHumphreys, Yazoo48 min
Jan 8, 6:20 PM CSTTornado WarningJANEast Carroll35 min
Jan 8, 6:32 PM CSTSevere Thunderstorm WarningJANWest Carroll33 min
Jan 8, 6:43 PM CSTSevere Thunderstorm WarningSHVLincoln47 min
Jan 8, 6:44 PM CSTSevere Thunderstorm WarningJANBolivar36 min
Jan 8, 7:07 PM CSTTornado WarningSHVUnion33 min
Jan 8, 7:25 PM CSTSevere Thunderstorm WarningJANBolivar, Sunflower35 min
Jan 8, 7:35 PM CSTSevere Thunderstorm WarningSHVLincoln35 min
Jan 8, 7:39 PM CSTSevere Thunderstorm WarningJANMorehouse51 min
Jan 8, 7:58 PM CSTSevere Thunderstorm WarningJANLeflore, Sunflower47 min

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.0 hours before the alert went out and 140 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 12:00Z on 1999-01-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1083 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 12:00Z on 1999-01-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 228 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
1083 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
228 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
1.2
Supercell composite
5.3

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.

Nearby

Tornado Watches in Louisiana, 1999Tornado Watches in Mississippi, 1999Tornado Watches in Arkansas, 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; radar from the NEXRAD Level II archive.