Alert archive / Louisiana / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 101, NWS Lake Charles, LA

May 5, 1991Acadia Parish, Lafayette Parish, Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 5, 1991, 5:30 AM CDT for Acadia Parish, Lafayette Parish, Vermilion Parish, Louisiana. It was in force for 60 min. 3 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
May 5, 1991, 5:30 AM CDT (10:30 UTC)
Expired
May 5, 1991, 6:30 AM CDT
In force
60 min
Issued by
NWS Lake Charles, LA
Area
Whole counties

Counties Acadia Parish, LA, Lafayette Parish, LA, Vermilion Parish, LA

What was reported inside it

TimeReportWhereRemark
May 5, 5:40 AM CDTHail 1.75Acadia, LA
May 5, 5:50 AM CDTHail 1.75Lafayette, LA
May 5, 6:15 AM CDTHail 1.75Lafayette, 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 10.5 hours before the alert went out and 90 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 1991-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2846 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 1991-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
2846 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
641 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.8
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
May 4, 11:02 PM CDTSevere Thunderstorm WarningLCHBeauregard58 min
May 5, 1:10 AM CDTSevere Thunderstorm WarningLCHCalcasieu65 min
May 5, 3:25 AM CDTSevere Thunderstorm WarningLCHCalcasieu65 min
May 5, 3:51 AM CDTSevere Thunderstorm WarningLCHRapides, Vernon69 min
May 5, 4:34 AM CDTSevere Thunderstorm WarningLCHCalcasieu, Jefferson Davis56 min
May 5, 5:02 AM CDTSevere Thunderstorm WarningLCHAcadia58 min
May 5, 8:45 AM CDTFlash Flood WarningLCHRapides2 hr
May 5, 1:34 PM CDTSevere Thunderstorm WarningLCHBeauregard41 min
May 5, 3:23 PM CDTSevere Thunderstorm WarningLCHAllen, Evangeline67 min
May 4, 9:23 PM CDTTornado WarningLCHAngelina37 min
May 5, 12:47 AM CDTSevere Thunderstorm WarningLCHJefferson58 min
May 5, 1:04 AM CDTSevere Thunderstorm WarningLCHHardin, Tyler56 min
May 5, 2:02 AM CDTSevere Thunderstorm WarningLCHOrange58 min
May 5, 3:18 AM CDTSevere Thunderstorm WarningLCHOrange27 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1991Every severe thunderstorm warning in 1991

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.