Alert archive / Louisiana / Severe Thunderstorm Warnings in 1987

Severe Thunderstorm Warning 40, NWS Shreveport, LA

March 17, 1987Madison Parish, Tensas Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Mar 17, 1987, 11:20 AM CST for Madison Parish, Tensas Parish, Louisiana. It was in force for 70 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
Mar 17, 1987, 11:20 AM CST (17:20 UTC)
Expired
Mar 17, 1987, 12:30 PM CST
In force
70 min
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties Madison Parish, LA, Tensas 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
Mar 17, 11:30 AM CSTHail 0.88Tensas, LA
Mar 17, 11:48 AM CSTHail 0.88Madison, 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

Jackson, MS (KJAN), launched 12:00Z, 5.3 hours before the alert went out and 115 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 1987-03-17Temperature 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 1987-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
0 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
275 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
Mar 16, 10:50 PM CSTSevere Thunderstorm WarningSHVCaddo80 min
Mar 16, 11:10 PM CSTSevere Thunderstorm WarningSHVDe Soto75 min
Mar 17, 8:00 AM CSTSevere Thunderstorm WarningSHVDe Soto, Red River75 min
Mar 17, 10:10 AM CSTSevere Thunderstorm WarningSHVJackson, Winn70 min
Mar 16, 8:55 PM CSTSevere Thunderstorm WarningSHVHarrison, Marion65 min
Mar 16, 8:55 PM CSTSevere Thunderstorm WarningSHVCass65 min
Mar 16, 10:20 PM CSTSevere Thunderstorm WarningSHVGregg70 min
Mar 16, 10:20 PM CSTSevere Thunderstorm WarningSHVCass70 min
Mar 17, 6:10 AM CSTSevere Thunderstorm WarningSHVRusk50 min
Mar 17, 6:55 AM CSTSevere Thunderstorm WarningSHVHarrison, Panola, Rusk80 min
Mar 17, 6:55 AM CSTSevere Thunderstorm WarningSHVGregg80 min
Mar 17, 7:30 AM CSTFlash Flood WarningSHVBowie, Cass3 hr

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.