Alert archive / Louisiana / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 2, NWS Shreveport, LA

February 20, 1989Caldwell Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Feb 20, 1989, 1:55 PM CST for Caldwell Parish, Louisiana. It was in force for 65 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
Feb 20, 1989, 1:55 PM CST (19:55 UTC)
Expired
Feb 20, 1989, 3:00 PM CST
In force
65 min
Issued by
NWS Shreveport, LA
Area
Whole counties

County Caldwell 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
Feb 20, 2:32 PM CSTHail 1Caldwell, 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, 7.9 hours before the alert went out and 193 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 1989-02-20Temperature 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 1989-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 247 square meters per square second.1939587897Sfc1 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
600 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
247 m²/s²
0-3 km storm-relative helicity
311 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.

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 20, 1:55 PM CSTSevere Thunderstorm WarningSHVFranklin, Tensas65 min
Feb 20, 1:55 PM CSTSevere Thunderstorm WarningSHVDe Soto, Sabine95 min
Feb 20, 3:10 PM CSTSevere Thunderstorm WarningSHVMadison, Tensas80 min
Feb 20, 3:27 PM CSTSevere Thunderstorm WarningSHVFranklin63 min
Feb 20, 4:32 PM CSTSevere Thunderstorm WarningSHVEast Carroll, Madison58 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1989Every severe thunderstorm warning in 1989

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.