Alert archive / Louisiana / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 30, NWS Lake Charles, LA

May 5, 1989Grant Parish, LaSalle Parish, Rapides Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 5, 1989, 3:20 AM CDT for Grant Parish, LaSalle Parish, Rapides Parish, Louisiana. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
May 5, 1989, 3:20 AM CDT (08:20 UTC)
Expired
May 5, 1989, 4:20 AM CDT
In force
60 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

Counties Grant Parish, LA, LaSalle Parish, LA, Rapides Parish, LA

The radar

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

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 8.3 hours before the alert went out and 227 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 00:00Z on 1989-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 309 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 00:00Z on 1989-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 140 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
309 J/kg
Mixed-layer CIN
-227 J/kg
Mixed-layer LCL
1028 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
140 m²/s²
0-3 km storm-relative helicity
223 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.2

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 Lake Charles, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 2:34 AM CDTSevere Thunderstorm WarningLCHBeauregard, Vernon60 min
May 5, 2:44 AM CDTSevere Thunderstorm WarningLCHCalcasieu, Cameron61 min
May 5, 3:18 AM CDTSevere Thunderstorm WarningLCHAllen, Jefferson Davis57 min
May 5, 3:51 AM CDTSevere Thunderstorm WarningLCHAcadia, Evangeline, Vermilion69 min
May 5, 4:10 AM CDTSevere Thunderstorm WarningLCHLafayette65 min
May 5, 1:00 AM CDTSevere Thunderstorm WarningLCHAngelina60 min
May 5, 1:45 AM CDTSevere Thunderstorm WarningLCHJasper, Nacogdoches, San Augustine60 min
May 5, 1:45 AM CDTSevere Thunderstorm WarningLCHTyler60 min
May 5, 2:10 AM CDTSevere Thunderstorm WarningLCHHardin50 min
May 5, 2:10 AM CDTSevere Thunderstorm WarningLCHNewton50 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; the sounding from the Mesonet's radiosonde archive.