Alert archive / Louisiana / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 29, NWS Shreveport, LA

February 9, 1990East Carroll Parish, Richland Parish, West Carroll Parish, Louisiana

NWS Shreveport, LA issued this severe thunderstorm warning at Feb 9, 1990, 8:20 PM CST for East Carroll Parish, Richland Parish, West Carroll Parish, Louisiana. It was in force for 85 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
Feb 9, 1990, 8:20 PM CST (02:20 UTC)
Expired
Feb 9, 1990, 9:45 PM CST
In force
85 min
Issued by
NWS Shreveport, LA
Area
Whole counties

Counties East Carroll Parish, LA, Richland Parish, LA, West Carroll 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 9, 8:35 PM CSTThunderstorm Wind 0West Carroll, LA
Feb 9, 8:40 PM CSTThunderstorm Wind 0Richland, 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 00:00Z, 2.3 hours before the alert went out and 137 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 00:00Z on 1990-02-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 984 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, Jackson, MS at 00:00Z on 1990-02-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
984 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
784 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
275 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.4

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 9, 6:03 PM CSTSevere Thunderstorm WarningSHVBienville, Bossier, Red River, Webster87 min
Feb 9, 6:03 PM CSTSevere Thunderstorm WarningSHVDe Soto, Natchitoches, Sabine87 min
Feb 9, 6:03 PM CSTSevere Thunderstorm WarningSHVClaiborne87 min
Feb 9, 7:06 PM CSTSevere Thunderstorm WarningSHVLincoln, Union89 min
Feb 9, 7:48 PM CSTSevere Thunderstorm WarningSHVMorehouse, Ouachita87 min
Feb 9, 8:20 PM CSTSevere Thunderstorm WarningSHVOuachita85 min
Feb 9, 9:43 PM CSTSevere Thunderstorm WarningSHVFranklin, Madison, Tensas62 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.