Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 118, NWS Lake Charles, LA

April 27, 1998Allen Parish, Evangeline Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 27, 1998, 11:40 PM CDT for Allen Parish, Evangeline Parish, Louisiana. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 27, 1998, 11:40 PM CDT (04:40 UTC)
Expired
Apr 28, 1998, 12:40 AM CDT
In force
60 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

Counties Allen Parish, LA, Evangeline Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.7 hours before the alert went out and 85 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 00:00Z on 1998-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1649 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 00:00Z on 1998-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
1649 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
573 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.9

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
Apr 27, 10:09 PM CDTSevere Thunderstorm WarningLCHRapides61 min
Apr 27, 11:02 PM CDTSevere Thunderstorm WarningLCHAvoyelles43 min
Apr 27, 11:14 PM CDTTornado WarningLCHAvoyelles46 min
Apr 27, 11:26 PM CDTSevere Thunderstorm WarningLCHCalcasieu, Cameron59 min
Apr 28, 12:03 AM CDTSevere Thunderstorm WarningLCHAvoyelles57 min
Apr 28, 1:30 AM CDTTornado WarningLCHVermilion65 min
Apr 27, 11:35 PM CDTSevere Thunderstorm WarningLCHHardin55 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1998Every severe thunderstorm warning in 1998

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.