Alert archive / Louisiana / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 25, NWS New Orleans, LA

March 11, 20264 parishes in Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Mar 11, 2026, 11:58 PM CDT for 4 parishes in Louisiana. It was in force for 47 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: Mar 11, 2026, 11:58 PM CDT (04:58 UTC)
Expired: Mar 12, 2026, 12:45 AM CDT
In force: 47 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Jefferson Parish, LA, Lafourche Parish, LA, Plaquemines Parish, LA, Terrebonne Parish, LA

The radar

The Hammond radar (KHDC), 112 km from the middle of the area, began a volume at 04:58 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 11, 6:56 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 5.0 hours before the alert went out and 289 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: -226 m²/s²
0-3 km storm-relative helicity: -63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Mar 11, 11:38 PM CDT, 20 minutes earlier.

Area forecast discussion, Mar 11, 11:38 PM CDT, 20 minutes before

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In the hours before

Local storm report, Mar 11, 11:28 PM CDT, 30 minutes before

Preliminary Local Storm Report
National Weather Service New Orleans LA
1128 PM CDT Wed Mar 11 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     Tstm Wnd Dmg     1 SSW Zachary           30.65N 91.15W
03/11/2026                   East Baton Rouge   LA   Fire Dept/Rescue

            Emergency management reported trees down in
            Zachary on Cobb Street. Time estimated by
            radar.

&&

RDF

Local storm report, Mar 11, 11:32 PM CDT, 26 minutes before

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Local storm report, Mar 11, 11:34 PM CDT, 24 minutes before

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Local storm report, Mar 11, 11:38 PM CDT, 20 minutes before

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Local storm report, Mar 11, 11:42 PM CDT, 16 minutes before

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Local storm report, Mar 11, 11:44 PM CDT, 14 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 11, 7:15 PM CDT	Tornado Warning	LIX	Pointe Coupee, West Feliciana	30 min
Mar 11, 7:28 PM CDT	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa, Washington	47 min
Mar 11, 7:32 PM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, West Feliciana	43 min
Mar 11, 7:38 PM CDT	Tornado Warning	LIX	Pointe Coupee, West Feliciana	12 min
Mar 11, 8:11 PM CDT	Tornado Warning	LIX	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Tangipahoa	38 min
Mar 11, 8:15 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	East Baton Rouge, East Feliciana, Livingston, Saint Helena, Tangipahoa, Washington	60 min
Mar 11, 8:20 PM CDT	Tornado Warning	LIX	Saint Helena, Tangipahoa	25 min
Mar 11, 8:43 PM CDT	Tornado Warning Tornado observed	LIX	Tangipahoa, Washington	20 min
Mar 11, 8:45 PM CDT	Tornado Warning	LIX	Tangipahoa	29 min
Mar 11, 8:57 PM CDT	Tornado Warning	LIX	Tangipahoa	33 min
Mar 11, 8:58 PM CDT	Tornado Warning	LIX	Tangipahoa	33 min
Mar 11, 9:00 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LIX	Livingston, Saint Helena, Saint John the Baptist, Saint Tammany, Tangipahoa, Washington	60 min
Mar 11, 9:00 PM CDT	Tornado Warning	LIX	Washington	45 min
Mar 11, 9:07 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, Livingston, West Baton Rouge	113 min
Mar 11, 9:10 PM CDT	Special Marine Warning	LIX		2 hr
Mar 11, 9:15 PM CDT	Tornado Warning	LIX	Saint Tammany	45 min
Mar 11, 9:31 PM CDT	Tornado Warning Tornado observed	LIX	Saint Tammany	29 min
Mar 11, 9:36 PM CDT	Tornado Warning	LIX	Saint Tammany, Washington	24 min
Mar 11, 9:36 PM CDT	Tornado Warning	LIX	Saint Tammany	39 min
Mar 11, 9:56 PM CDT	Tornado Warning	LIX	Saint Tammany	49 min
Mar 11, 10:14 PM CDT	Tornado Warning	LIX	Saint Tammany	31 min
Mar 11, 10:17 PM CDT	Wind Advisory	LIX	Jefferson, Orleans	12 hr
Mar 11, 10:34 PM CDT	Special Weather Statement	LIX	Saint Charles	41 min
Mar 11, 10:40 PM CDT	Gale Warning	LIX		11 hr
Mar 11, 10:40 PM CDT	Small Craft Advisory	LIX		20 hr
Mar 11, 10:43 PM CDT	Special Marine Warning	LIX		62 min
Mar 11, 10:47 PM CDT	Severe Thunderstorm Warning	LIX	Orleans, Saint Tammany	43 min
Mar 11, 10:56 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Saint Bernard, Saint Charles	3 hr
Mar 11, 11:09 PM CDT	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Plaquemines, Saint Charles, Terrebonne	51 min
Mar 11, 11:54 PM CDT	Special Marine Warning	LIX		51 min
Mar 11, 11:56 PM CDT	Special Marine Warning	LIX		64 min
Mar 11, 11:59 PM CDT	Special Marine Warning	LIX		61 min
Mar 12, 12:01 AM CDT	Special Marine Warning	LIX		59 min
Mar 12, 12:30 AM CDT	Special Marine Warning	LIX		90 min
Mar 12, 1:00 AM CDT	Special Marine Warning	LIX		60 min
Mar 12, 1:54 AM CDT	Special Marine Warning	LIX		2 hr
Mar 11, 7:35 PM CDT	Tornado Warning	LIX	Amite, Pike	40 min
Mar 11, 7:57 PM CDT	Tornado Warning	LIX	Pike, Walthall	44 min
Mar 11, 10:04 PM CDT	Severe Thunderstorm Warning	LIX	Hancock, Pearl River	41 min
Mar 11, 10:22 PM CDT	Tornado Warning	LIX	Hancock, Pearl River	23 min
Mar 11, 10:59 PM CDT	Tornado Warning	LIX	Hancock, Harrison	12 min
Mar 11, 11:31 PM CDT	Tornado Warning	LIX	Jackson	29 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2026 Every 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.