Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 121, NWS New Orleans, LA

June 27, 2019Jefferson Parish, Plaquemines Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 27, 2019, 5:41 PM CDT for Jefferson Parish, Plaquemines Parish, Louisiana. It was in force for 34 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
Jun 27, 2019, 5:41 PM CDT (22:41 UTC)
Expired
Jun 27, 2019, 6:15 PM CDT
In force
34 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Jefferson Parish, LA, Plaquemines Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.7 hours before the alert went out and 75 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 2019-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 648 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 2019-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 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
648 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
1764 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
85 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 3:14 PM CDTSpecial Weather StatementLIXWashington31 min
Jun 27, 3:42 PM CDTSpecial Weather StatementLIXWashington33 min
Jun 27, 3:50 PM CDTSevere Thunderstorm WarningLIXWashington25 min
Jun 27, 4:15 PM CDTSpecial Weather StatementLIXWashington30 min
Jun 27, 4:55 PM CDTSpecial Marine WarningLIX35 min
Jun 27, 5:06 PM CDTSpecial Marine WarningLIX24 min
Jun 27, 5:16 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, Livingston29 min
Jun 27, 5:23 PM CDTSpecial Marine WarningLIX52 min
Jun 27, 5:29 PM CDTSpecial Weather StatementLIXOrleans31 min
Jun 27, 5:43 PM CDTSpecial Weather StatementLIXSaint James32 min
Jun 27, 5:46 PM CDTSpecial Weather StatementLIXAscension29 min
Jun 27, 5:48 PM CDTSevere Thunderstorm WarningLIXLafourche, Terrebonne27 min
Jun 27, 6:10 PM CDTSpecial Marine WarningLIX50 min
Jun 27, 6:12 PM CDTSpecial Weather StatementLIXTerrebonne33 min
Jun 27, 6:14 PM CDTSpecial Weather StatementLIXAscension31 min
Jun 27, 6:25 PM CDTSevere Thunderstorm WarningLIXLafourche, Terrebonne35 min
Jun 27, 6:52 PM CDTSpecial Weather StatementLIXJefferson23 min
Jun 27, 6:55 PM CDTSpecial Marine WarningLIX50 min
Jun 27, 6:57 PM CDTSevere Thunderstorm WarningLIXWashington33 min
Jun 27, 3:01 PM CDTSpecial Weather StatementLIXPearl River29 min
Jun 27, 3:40 PM CDTSpecial Weather StatementLIXPearl River35 min
Jun 27, 4:14 PM CDTSpecial Weather StatementLIXPearl River31 min
Jun 27, 4:32 PM CDTSpecial Weather StatementLIXJackson28 min
Jun 27, 4:39 PM CDTSpecial Weather StatementLIXPearl River36 min
Jun 27, 4:54 PM CDTSpecial Weather StatementLIXJackson36 min
Jun 27, 5:04 PM CDTSpecial Weather StatementLIXWalthall26 min
Jun 27, 5:14 PM CDTSevere Thunderstorm WarningLIXJackson31 min
Jun 27, 6:16 PM CDTSpecial Weather StatementLIXWalthall29 min
Jun 27, 6:49 PM CDTSpecial Weather StatementLIXPike26 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2019Every severe thunderstorm warning in 2019

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.