Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 161, NWS New Orleans, LA

October 4, 2019Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Oct 4, 2019, 4:37 PM CDT for Saint Tammany Parish, Tangipahoa Parish, Washington Parish, Louisiana. It was in force for 38 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
Oct 4, 2019, 4:37 PM CDT (21:37 UTC)
Expired
Oct 4, 2019, 5:15 PM CDT
In force
38 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.6 hours before the alert went out and 59 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 2019-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 640 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 2019-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
640 J/kg
Mixed-layer CIN
-104 J/kg
Mixed-layer LCL
1337 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
-21 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
Oct 4, 2:55 PM CDTSpecial Weather StatementLIXSaint Tammany35 min
Oct 4, 3:30 PM CDTSpecial Weather StatementLIXSaint Tammany45 min
Oct 4, 3:32 PM CDTSpecial Weather StatementLIXWest Feliciana43 min
Oct 4, 3:58 PM CDTSpecial Weather StatementLIXEast Feliciana47 min
Oct 4, 4:10 PM CDTSpecial Weather StatementLIXSaint Tammany, Tangipahoa50 min
Oct 4, 4:12 PM CDTSpecial Weather StatementLIXWest Feliciana33 min
Oct 4, 4:23 PM CDTSevere Thunderstorm WarningLIXPointe Coupee, West Feliciana37 min
Oct 4, 4:35 PM CDTSevere Thunderstorm WarningLIXWest Feliciana25 min
Oct 4, 5:01 PM CDTSpecial Weather StatementLIXTangipahoa29 min
Oct 4, 5:05 PM CDTSpecial Weather StatementLIXWashington40 min
Oct 4, 5:45 PM CDTSpecial Weather StatementLIXWashington45 min
Oct 4, 5:59 PM CDTSpecial Weather StatementLIXEast Baton Rouge, West Baton Rouge46 min
Oct 4, 6:00 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, West Baton Rouge30 min
Oct 4, 3:08 PM CDTSpecial Weather StatementLIXHancock37 min
Oct 4, 3:34 PM CDTSpecial Weather StatementLIXHancock41 min
Oct 4, 3:39 PM CDTSpecial Weather StatementLIXPike51 min
Oct 4, 3:56 PM CDTSpecial Weather StatementLIXPearl River34 min
Oct 4, 4:27 PM CDTSpecial Weather StatementLIXAmite33 min
Oct 4, 4:59 PM CDTSevere Thunderstorm WarningLIXWilkinson31 min
Oct 4, 5:00 PM CDTSpecial Weather StatementLIXWilkinson45 min
Oct 4, 5:17 PM CDTSevere Thunderstorm WarningLIXAmite, Wilkinson43 min
Oct 4, 5:53 PM CDTSpecial Weather StatementLIXWilkinson52 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.