Alert archive / Louisiana / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 147, NWS New Orleans, LA

August 23, 2026Tangipahoa Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Aug 23, 2026, 4:43 PM CDT for Tangipahoa Parish, Louisiana. It was in force for 31 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
Aug 23, 2026, 4:43 PM CDT (21:43 UTC)
Expired
Aug 23, 2026, 5:14 PM CDT
In force
31 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Tangipahoa Parish, LA

The radar

The Hammond radar (KHDC), 12 km from the middle of the area, began a volume at 21:43 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 9.7 hours before the alert went out and 80 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 2026-08-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2609 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 2026-08-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 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
2609 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
1182 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-3 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
Aug 23, 2:43 PM CDTSpecial Weather StatementLIXEast Feliciana47 min
Aug 23, 3:12 PM CDTSpecial Weather StatementLIXEast Feliciana, Saint Helena33 min
Aug 23, 3:24 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Saint Helena51 min
Aug 23, 4:06 PM CDTSpecial Weather StatementLIXLivingston24 min
Aug 23, 4:08 PM CDTSpecial Weather StatementLIXTangipahoa37 min
Aug 23, 4:20 PM CDTSpecial Weather StatementLIXTangipahoa25 min
Aug 23, 4:22 PM CDTSpecial Weather StatementLIXLivingston38 min
Aug 23, 4:39 PM CDTSpecial Marine WarningLIX96 min
Aug 23, 4:58 PM CDTSevere Thunderstorm WarningLIXJefferson, Saint Charles, Saint John the Baptist, Tangipahoa27 min
Aug 23, 6:29 PM CDTSpecial Weather StatementLIXJefferson31 min
Aug 23, 6:47 PM CDTSpecial Marine WarningLIX58 min
Aug 23, 6:48 PM CDTSpecial Weather StatementLIXJefferson27 min
Aug 23, 1:44 PM CDTSpecial Weather StatementLIXWilkinson31 min
Aug 23, 2:04 PM CDTSpecial Weather StatementLIXAmite41 min
Aug 23, 6:33 PM CDTSpecial Weather StatementLIXJackson27 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2026Every severe thunderstorm warning in 2026

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; radar from the NEXRAD Level II archive.