Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 177, NWS Shreveport, LA

December 19, 1987Jackson Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Dec 19, 1987, 2:17 PM CST for Jackson Parish, Winn Parish, Louisiana. It was in force for 88 min. 1 report 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 19, 1987, 2:17 PM CST (20:17 UTC)
Expired
Dec 19, 1987, 3:45 PM CST
In force
88 min
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Jackson Parish, LA, Winn 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 19, 2:55 PM CSTThunderstorm Wind 61Jackson, 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

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.3 hours before the alert went out and 230 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, Lake Charles Mun, LA at 12:00Z on 1987-12-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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, Lake Charles Mun, LA at 12:00Z on 1987-12-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 325 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
4 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
589 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
325 m²/s²
0-3 km storm-relative helicity
340 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 Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 19, 12:42 PM CSTSevere Thunderstorm WarningSHVBossier, Caddo78 min
Dec 19, 12:42 PM CSTSevere Thunderstorm WarningSHVDe Soto, Sabine78 min
Dec 19, 1:45 PM CSTSevere Thunderstorm WarningSHVNatchitoches, Sabine85 min
Dec 19, 1:45 PM CSTSevere Thunderstorm WarningSHVBienville, Claiborne, Webster85 min
Dec 19, 1:45 PM CSTSevere Thunderstorm WarningSHVRed River85 min
Dec 19, 2:17 PM CSTSevere Thunderstorm WarningSHVLincoln, Ouachita, Union88 min
Dec 19, 3:19 PM CSTSevere Thunderstorm WarningSHVMorehouse, Richland, West Carroll56 min
Dec 19, 3:19 PM CSTSevere Thunderstorm WarningSHVCaldwell56 min
Dec 19, 3:27 PM CSTSevere Thunderstorm WarningSHVFranklin, Madison, Tensas93 min
Dec 19, 3:27 PM CSTSevere Thunderstorm WarningSHVEast Carroll93 min
Dec 19, 11:32 AM CSTSevere Thunderstorm WarningSHVHarrison, Marion88 min
Dec 19, 11:32 AM CSTSevere Thunderstorm WarningSHVGregg, Rusk88 min
Dec 19, 12:32 PM CSTSevere Thunderstorm WarningSHVCass58 min
Dec 19, 12:32 PM CSTSevere Thunderstorm WarningSHVPanola, Shelby58 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1987Every severe thunderstorm warning in 1987

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.