Alert archive / Louisiana / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 247, NWS New Orleans, LA

May 11, 1995Lafourche Parish, Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at May 11, 1995, 2:25 PM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
May 11, 1995, 2:25 PM CDT (19:25 UTC)
Expired
May 11, 1995, 3:30 PM CDT
In force
65 min
Issued by
NWS New Orleans, LA
Area
Whole counties

Counties Lafourche Parish, LA, Terrebonne Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 7.4 hours before the alert went out and 128 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, Slidell Radar S, LA at 12:00Z on 1995-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1596 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, Slidell Radar S, LA at 12:00Z on 1995-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 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
1596 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
598 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.5

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 New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 11, 3:23 PM CDTSevere Thunderstorm WarningLIXJefferson, Plaquemines67 min
May 11, 3:23 PM CDTSevere Thunderstorm WarningLIXSaint Bernard67 min
May 11, 3:28 PM CDTSevere Thunderstorm WarningLIXLafourche, Terrebonne62 min
May 11, 3:36 PM CDTTornado WarningLIXLafourche54 min
May 11, 4:17 PM CDTTornado WarningLIXPlaquemines58 min
May 11, 4:17 PM CDTTornado WarningLIXJefferson22 min
May 11, 4:47 PM CDTSevere Thunderstorm WarningLIXSaint Bernard28 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 1995Every severe thunderstorm warning in 1995

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.