Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 256, NWS Shreveport, LA

December 21, 1990Bienville Parish, Red River Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Dec 21, 1990, 3:17 PM CST for Bienville Parish, Red River Parish, Louisiana. It was in force for 88 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Dec 21, 1990, 3:17 PM CST (21:17 UTC)
Expired
Dec 21, 1990, 4:45 PM CST
In force
88 min
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Bienville Parish, LA, Red River Parish, LA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Dec 21, 3:32 PM CSTHail 2.75Red River, LA
Dec 21, 3:53 PM CSTHail 1Bienville, LA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 12:00Z, 9.3 hours before the alert went out and 133 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, Longview/Gregg, TX at 12:00Z on 1990-12-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1707 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, Longview/Gregg, TX at 12:00Z on 1990-12-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 280 square meters per square second.1939587897117Sfc1 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
1707 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
742 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
280 m²/s²
0-3 km storm-relative helicity
252 m²/s²
Significant tornado parameter
2.6
Supercell composite
10.6

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 Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 21, 12:07 AM CSTTornado WarningSHVBossier, Caddo68 min
Dec 21, 12:40 AM CSTTornado WarningSHVWebster65 min
Dec 21, 12:55 AM CSTSevere Thunderstorm WarningSHVEast Carroll50 min
Dec 21, 10:48 AM CSTSevere Thunderstorm WarningSHVBienville57 min
Dec 21, 11:05 AM CSTSevere Thunderstorm WarningSHVJackson, Lincoln55 min
Dec 21, 1:08 PM CSTSevere Thunderstorm WarningSHVRichland, West Carroll67 min
Dec 21, 1:08 PM CSTSevere Thunderstorm WarningSHVCaldwell, Jackson, Ouachita, Winn67 min
Dec 21, 1:33 PM CSTSevere Thunderstorm WarningSHVDe Soto72 min
Dec 21, 1:46 PM CSTSevere Thunderstorm WarningSHVEast Carroll, Madison89 min
Dec 21, 1:46 PM CSTSevere Thunderstorm WarningSHVTensas89 min
Dec 21, 2:02 PM CSTTornado WarningSHVMadison, Tensas58 min
Dec 21, 2:55 PM CSTSevere Thunderstorm WarningSHVWebster65 min
Dec 21, 3:17 PM CSTSevere Thunderstorm WarningSHVFranklin, Madison, Tensas88 min
Dec 21, 4:03 PM CSTTornado WarningSHVTensas57 min
Dec 21, 5:16 PM CSTSevere Thunderstorm WarningSHVMadison, Tensas59 min
Dec 21, 5:30 PM CSTSevere Thunderstorm WarningSHVNatchitoches, Sabine60 min
Dec 21, 5:30 PM CSTTornado WarningSHVMadison60 min
Dec 20, 10:08 PM CSTSevere Thunderstorm WarningSHVPanola, Rusk, Shelby67 min
Dec 20, 10:40 PM CSTSevere Thunderstorm WarningSHVHarrison65 min
Dec 21, 8:44 AM CSTSevere Thunderstorm WarningSHVCass, Marion61 min
Dec 21, 8:44 AM CSTSevere Thunderstorm WarningSHVHarrison61 min
Dec 21, 1:16 PM CSTSevere Thunderstorm WarningSHVPanola, Shelby59 min
Dec 21, 11:49 AM CSTSevere Thunderstorm WarningSHVNevada41 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.