Alert archive / Louisiana / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 64, NWS New Orleans, LA

April 16, 2023Lafourche Parish, Terrebonne Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Apr 16, 2023, 1:18 AM CDT for Lafourche Parish, Terrebonne Parish, Louisiana. It was in force for 42 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 16, 2023, 1:18 AM CDT (06:18 UTC)
Expired
Apr 16, 2023, 2:00 AM CDT
In force
42 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Lafourche Parish, LA, Terrebonne Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.3 hours before the alert went out and 261 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 2023-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2634 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 2023-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.193958Sfc1 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
2634 J/kg
Mixed-layer CIN
-43 J/kg
Mixed-layer LCL
942 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
-0.4
Supercell composite
-3.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 15, 3:52 PM CDT, 9 hours 26 minutes earlier.

Area forecast discussion, Apr 15, 3:52 PM CDT, 9 hours 26 minutes before
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The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 15, 7:23 PM CDTSpecial Weather StatementLIXTerrebonne37 min
Apr 15, 7:34 PM CDTSpecial Weather StatementLIXJefferson26 min
Apr 15, 8:40 PM CDTSpecial Marine WarningLIX65 min
Apr 15, 11:00 PM CDTSpecial Weather StatementLIXWest Feliciana30 min
Apr 16, 12:22 AM CDTSpecial Weather StatementLIXLafourche, Terrebonne38 min
Apr 16, 12:28 AM CDTSpecial Weather StatementLIXPointe Coupee47 min
Apr 16, 12:46 AM CDTSpecial Weather StatementLIXEast Baton Rouge, West Baton Rouge44 min
Apr 16, 12:56 AM CDTSpecial Marine WarningLIX49 min
Apr 16, 1:02 AM CDTSpecial Weather StatementLIXLafourche28 min
Apr 16, 1:05 AM CDTSpecial Weather StatementLIXTerrebonne25 min
Apr 16, 1:16 AM CDTSpecial Marine WarningLIX44 min
Apr 16, 1:22 AM CDTSevere Thunderstorm WarningLIXLafourche, Terrebonne38 min
Apr 16, 1:26 AM CDTSpecial Marine WarningLIX49 min
Apr 16, 1:31 AM CDTSpecial Weather StatementLIXAscension, Assumption, Iberville, Livingston, Saint James29 min
Apr 16, 1:49 AM CDTSpecial Marine WarningLIX41 min
Apr 16, 1:54 AM CDTSevere Thunderstorm WarningLIXJefferson, Lafourche66 min
Apr 16, 1:56 AM CDTSpecial Weather StatementLIXPlaquemines34 min
Apr 16, 1:57 AM CDTSpecial Weather StatementLIXOrleans48 min
Apr 16, 2:01 AM CDTSevere Thunderstorm WarningLIXTerrebonne44 min
Apr 16, 2:03 AM CDTSpecial Marine WarningLIX57 min
Apr 16, 2:06 AM CDTSpecial Weather StatementLIXSaint Charles24 min
Apr 16, 2:12 AM CDTSevere Thunderstorm WarningLIXJefferson, Orleans, Plaquemines, Saint Bernard29 min
Apr 16, 2:28 AM CDTSpecial Marine WarningLIX92 min
Apr 16, 2:35 AM CDTSpecial Marine WarningLIX40 min
Apr 16, 2:38 AM CDTSpecial Weather StatementLIXOrleans37 min
Apr 16, 2:43 AM CDTSpecial Weather StatementLIXLafourche, Saint Charles47 min
Apr 16, 3:02 AM CDTSpecial Weather StatementLIXJefferson28 min
Apr 16, 3:04 AM CDTSpecial Weather StatementLIXPlaquemines26 min
Apr 16, 3:10 AM CDTSpecial Marine WarningLIX65 min
Apr 16, 3:13 AM CDTSpecial Marine WarningLIX62 min
Apr 16, 3:27 AM CDTSevere Thunderstorm WarningLIXPlaquemines48 min
Apr 16, 3:51 AM CDTSpecial Marine WarningLIX39 min
Apr 16, 4:58 AM CDTSpecial Marine WarningLIX47 min
Apr 16, 12:18 AM CDTSpecial Weather StatementLIXAmite42 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2023Every severe thunderstorm warning in 2023

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.