Alert archive / Louisiana / Flash Flood Warnings in 2026

Flash Flood Warning 29, NWS New Orleans, LA

May 9, 20265 parishes in Louisiana

NWS New Orleans, LA issued this flash flood warning at May 9, 2026, 8:13 AM CDT for 5 parishes in Louisiana. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 9, 2026, 8:13 AM CDT (13:13 UTC)
Expired: May 9, 2026, 10:41 AM CDT
In force: 2 hr
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Flood severity: None

Counties Ascension Parish, LA, East Baton Rouge Parish, LA, Iberville Parish, LA, Livingston Parish, LA, West Baton Rouge Parish, LA

The radar

The Hammond radar (KHDC), 66 km from the middle of the area, began a volume at 13:15 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, 1.2 hours before the alert went out and 133 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: 1031 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 9.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at May 9, 7:08 AM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, May 9, 7:08 AM CDT, 1 hour 5 minutes before

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In the hours before

Special weather statement, May 9, 3:59 AM CDT, 4 hours 14 minutes before

Special Weather Statement
National Weather Service New Orleans LA
359 AM CDT Sat May 9 2026

LAZ076>080-MSZ086-090930-
Southeast St. Tammany LA-Western Orleans LA-Eastern Orleans LA-
Northern St. Tammany LA-Southwestern St. Tammany LA-
Southern Hancock MS-
359 AM CDT Sat May 9 2026

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF ORLEANS, SOUTHEASTERN
ST. TAMMANY PARISHES IN SOUTHEASTERN LOUISIANA AND SOUTHERN HANCOCK
COUNTIES THROUGH 430 AM CDT
...

At 359 AM CDT, Doppler radar was tracking a cluster of strong
thunderstorms along a line extending from near Pearlington to 6 miles
southeast of Lacombe to 9 miles northwest of New Orleans. Movement
was east at 35 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
New Orleans, Slidell, Bay St. Louis, Waveland, East New Orleans, Lake
Catherine, Pearlington, Shoreline Park, and Lakefront Airport.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 242 and 255, and
between mile markers 259 and 273.
 Interstate 10 in Mississippi between mile markers 1 and 8.
 Interstate 510 between mile markers 1 and 3.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3024 8940 3017 8943 3013 8961 3003 8970
      3001 8975 3002 8981 2999 8983 3002 9002
      3006 9008 3007 9001 3017 8989 3014 8982
      3017 8977 3022 8986 3024 8996 3035 8963
      3032 8930
TIME...MOT...LOC 0859Z 280DEG 32KT 3032 8963 3023 8988 3017 9004

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

Special weather statement, May 9, 4:36 AM CDT, 3 hours 37 minutes before

Special Weather Statement
National Weather Service New Orleans LA
436 AM CDT Sat May 9 2026

MSZ068-069-091000-
Wilkinson MS-Amite MS-
436 AM CDT Sat May 9 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF SOUTHEASTERN
WILKINSON AND SOUTHERN AMITE COUNTIES THROUGH 500 AM CDT
...

At 436 AM CDT, Doppler radar was tracking a strong thunderstorm near
Centreville, or 13 miles north of Clinton, moving east at 30 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Liberty, Centreville, and Gillsburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3100 9110 3112 9112 3126 9071 3100 9063
TIME...MOT...LOC 0936Z 254DEG 25KT 3106 9101

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

Special weather statement, May 9, 4:40 AM CDT, 3 hours 33 minutes before

Special Weather Statement
National Weather Service New Orleans LA
440 AM CDT Sat May 9 2026

MSZ068-069-091015-
Wilkinson MS-Amite MS-
440 AM CDT Sat May 9 2026

...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHEASTERN
WILKINSON AND NORTHERN AMITE COUNTIES THROUGH 515 AM CDT
...

At 440 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles southeast of Dolorosa, or 22 miles southeast of Natchez, moving
east at 45 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Liberty, Gloster, Smithdale, Dolorosa, and Crosby.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3135 9121 3134 9115 3132 9112 3134 9106
      3133 9106 3133 9103 3135 9102 3133 9099
      3135 9098 3135 9062 3110 9062 3118 9139
      3134 9138 3137 9122
TIME...MOT...LOC 0940Z 273DEG 40KT 3126 9124

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

Special weather statement, May 9, 6:07 AM CDT, 2 hours 6 minutes before

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Special weather statement, May 9, 6:35 AM CDT, 1 hour 38 minutes before

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Special weather statement, May 9, 7:33 AM CDT, 40 minutes before

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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
May 8, 7:54 PM CDT	River Flood Warning	LIX	Saint Tammany	6 days
May 8, 8:03 PM CDT	River Flood Warning	LIX	Tangipahoa	5 days
May 8, 10:10 PM CDT	Special Weather Statement	LIX	Iberville	35 min
May 8, 10:41 PM CDT	Special Weather Statement	LIX	West Baton Rouge	34 min
May 8, 11:03 PM CDT	Special Weather Statement	LIX	Ascension	27 min
May 9, 12:52 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Iberville, Pointe Coupee, West Baton Rouge	38 min
May 9, 1:28 AM CDT	Special Weather Statement	LIX	East Baton Rouge, West Baton Rouge	32 min
May 9, 1:39 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Iberville, Livingston, Pointe Coupee, West Baton Rouge	47 min
May 9, 3:58 AM CDT	Special Marine Warning	LIX		62 min
May 9, 3:59 AM CDT	Special Weather Statement	LIX	Orleans	31 min
May 9, 4:56 AM CDT	Special Marine Warning	LIX		64 min
May 9, 6:07 AM CDT	Special Weather Statement	LIX	East Baton Rouge, Saint Helena, Washington	53 min
May 9, 6:35 AM CDT	Special Weather Statement	LIX	Tangipahoa, Washington	40 min
May 9, 6:38 AM CDT	Severe Thunderstorm Warning	LIX	Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington	52 min
May 9, 6:58 AM CDT	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	47 min
May 9, 7:02 AM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	118 min
May 9, 7:16 AM CDT	Special Marine Warning	LIX		89 min
May 9, 7:33 AM CDT	Special Weather Statement	LIX	Saint Tammany	42 min
May 9, 7:56 AM CDT	Special Marine Warning	LIX		64 min
May 9, 9:00 AM CDT	Special Marine Warning	LIX		60 min
May 9, 9:07 AM CDT	River Flood Warning	LIX	Saint Tammany	48 hr
May 9, 9:07 AM CDT	River Flood Warning	LIX	Saint Tammany	29 hr
May 9, 9:21 AM CDT	Areal Flood Advisory	LIX	Ascension, Iberville, Livingston	3 hr
May 9, 11:14 AM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans	35 min
May 9, 11:49 AM CDT	Flash Flood Warning	LIX	Jefferson, Orleans	2 hr
May 9, 11:52 AM CDT	River Flood Warning	LIX	Saint Tammany	3 days
May 9, 12:07 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans, Plaquemines, Saint Bernard	3 hr
May 9, 12:11 PM CDT	Flash Flood Warning	LIX	Assumption, Lafourche, Terrebonne	3 hr
May 9, 12:19 PM CDT	Areal Flood Advisory	LIX	Saint Charles	3 hr
May 9, 1:49 PM CDT	Areal Flood Advisory	LIX	Orleans, Saint Tammany	3 hr
May 9, 2:03 PM CDT	Areal Flood Advisory	LIX	Jefferson, Orleans	102 min
May 9, 3:04 PM CDT	Areal Flood Advisory	LIX	Assumption, Lafourche, Terrebonne	82 min
May 9, 3:18 PM CDT	Areal Flood Advisory	LIX	Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge	3 hr
May 9, 4:44 PM CDT	Areal Flood Advisory	LIX	East Baton Rouge, Iberville, Livingston, Pointe Coupee, Saint Helena, West Baton Rouge and 1 more	91 min
May 8, 7:55 PM CDT	River Flood Warning	LIX	Pearl River	67 hr
May 8, 10:55 PM CDT	Special Weather Statement	LIX	Wilkinson	35 min
May 9, 1:01 AM CDT	Special Weather Statement	LIX	Hancock	29 min
May 9, 1:43 AM CDT	Special Weather Statement	LIX	Harrison	17 min
May 9, 4:36 AM CDT	Special Weather Statement	LIX	Amite	24 min
May 9, 4:40 AM CDT	Special Weather Statement	LIX	Amite	35 min
May 9, 5:16 AM CDT	Severe Thunderstorm Warning	LIX	Amite, Pike, Walthall	44 min
May 9, 5:41 AM CDT	Flash Flood Warning	LIX	Amite, Pike, Walthall, Wilkinson	4 hr
May 9, 7:49 AM CDT	Severe Thunderstorm Warning	LIX	Hancock, Harrison	41 min
May 9, 8:25 AM CDT	Special Weather Statement	LIX	Harrison, Jackson	50 min
May 9, 8:36 AM CDT	River Flood Warning	LIX	Pike, Walthall	20 hr
May 9, 9:07 AM CDT	Areal Flood Advisory	LIX	Harrison	113 min
May 9, 11:50 AM CDT	River Flood Warning	LIX	Pike	8 hr

Nearby

Flash Flood Warnings in Louisiana, 2026 Every flash flood 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.