Louisiana, 2023Flash Flooding in Louisiana, September 4, 2023
September 4, 2023 · NWS LIX · 14 events in 2 counties and zones
Fueled by an abundance of moisture, a thunderstorm complex developed during peak heating over the Pearl River basin. Aided by a very weak steering flow, the complex moved very slowly over portions of urbanized areas such as Slidell and eventually metro New Orleans, where flash flooding occurred during the afternoon and evening.
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
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- Deaths
- 0
- Injuries
- 0
- Property damage
- $60,000
- Crop damage
- None recorded
- Events
- 14
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
Fueled by an abundance of moisture, a thunderstorm complex developed during peak heating over the Pearl River basin. Aided by a very weak steering flow, the complex moved very slowly over portions of urbanized areas such as Slidell and eventually metro New Orleans, where flash flooding occurred during the afternoon and evening. The complex finally weakened during the evening as it became cold-pool dominant.
Flash Flood, St. Tammany
- When
- September 4, 11:02 AM CST to 1:02 PM CST
- Where
- St. Tammany County, 0.91 mi NE of Slidell to 0.76 mi NE of Slidell
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 30.280, -89.770
Street flooding verified by photo on social media at Gause and Ninth in Slidell.
Flash Flood, St. Tammany
- When
- September 4, 11:36 AM CST to 1:36 PM CST
- Where
- St. Tammany County, 1.51 mi SSW of Slidell Arpt to 1.38 mi S of Slidell Arpt
- Cause
- Heavy Rain
- Reported by
- NWS Employee
- Coordinates
- 30.330, -89.830
Northbound lane of Airport Road partially impassable from flooding rain.
Flash Flood, St. Tammany
- When
- September 4, 11:49 AM CST to 1:49 PM CST
- Where
- St. Tammany County, 0.91 mi NE of Slidell to 0.8 mi NE of Slidell
- Cause
- Heavy Rain
- Reported by
- Fire Department/Rescue
- Coordinates
- 30.280, -89.770
Photo relayed of flooded roadways and report of people moving vehicles due to ongoing flooding.
Flash Flood, Orleans
- When
- September 4, 12:00 PM CST to 2:00 PM CST
- Where
- Orleans County, 2.74 mi NW of Vieux Carre to 2.61 mi NW of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- NWS Employee
- Coordinates
- 30.000, -90.110
Report of flooded underpass at Canal Blvd with roads impassable in areas.
Flash Flood, Orleans
- When
- September 4, 12:06 PM CST to 2:06 PM CST
- Where
- Orleans County, 0.6 mi W of Vieux Carre to 0.84 mi W of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 29.970, -90.090
Flooded street report at N Norman C Francis Parkway at Canal Street.
Flash Flood, Orleans
- When
- September 4, 12:13 PM CST to 2:13 PM CST
- Where
- Orleans County, 1.51 mi NNE of Vieux Carre to 1.65 mi NNE of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 29.990, -90.070
Gentilly and 610 Underpass closed due to flood waters.
Flash Flood, St. Tammany
- When
- September 4, 12:14 PM CST to 2:14 PM CST
- Where
- St. Tammany County, 0.91 mi SW of Slidell Arpt to 0.64 mi WSW of Slidell Arpt
- Cause
- Heavy Rain
- Property damage
- $15,000
- Reported by
- Public
- Coordinates
- 30.340, -89.830
Photo via social media of flooded roadways and a car halfway submerged on Alisa Drive in the Belair Subdivision in Slidell.
Flash Flood, Orleans
- When
- September 4, 12:15 PM CST to 2:15 PM CST
- Where
- Orleans County, 1.92 mi WNW of Vieux Carre to 2.17 mi WNW of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 29.980, -90.110
I-10 in both directions closed due to high water at Metairie Road.
Flash Flood, St. Tammany
- When
- September 4, 12:30 PM CST to 2:30 PM CST
- Where
- St. Tammany County, 1.38 mi ENE of Slidell to 1.13 mi SE of North Slidell
- Cause
- Heavy Rain
- Property damage
- $30,000
- Reported by
- Emergency Manager
- Coordinates
- 30.280, -89.760
Photo of water covered roads on Gause Blvd. Water up to car doors.
Flash Flood, Orleans
- When
- September 4, 12:35 PM CST to 2:35 PM CST
- Where
- Orleans County, 1.51 mi NNW of New Orleans to 1.36 mi NNW of New Orleans
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 29.970, -90.110
Report of street flooding at S Carrolton Avenue and Tulane Avenue.
Flash Flood, Orleans
- When
- September 4, 12:35 PM CST to 2:35 PM CST
- Where
- Orleans County, 0.6 mi E of Vieux Carre to 0.4 mi ESE of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 29.970, -90.070
Flooded street report at Ursulines Avenue and N Claiborne Avenue.
Flash Flood, Orleans
- When
- September 4, 12:38 PM CST to 2:38 PM CST
- Where
- Orleans County, 2.74 mi NW of Vieux Carre to 2.86 mi NW of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 30.000, -90.110
Flooded street report at Polk Street and West End Blvd.
Flash Flood, Orleans
- When
- September 4, 12:45 PM CST to 2:45 PM CST
- Where
- Orleans County, 3.01 mi NNW of Vieux Carre to 3.21 mi NNW of Vieux Carre
- Cause
- Heavy Rain
- Reported by
- Public
- Coordinates
- 30.010, -90.100
Video of deep water covering roads on Memphis and Chapelle in Lakeview.
Flash Flood, Orleans
- When
- September 4, 1:00 PM CST to 3:00 PM CST
- Where
- Orleans County, 2.27 mi NW of Vieux Carre to 2.22 mi NW of Vieux Carre
- Cause
- Heavy Rain
- Property damage
- $15,000
- Reported by
- Public
- Coordinates
- 29.990, -90.110
Photo of water up to the top of a fully submerged car on Canal Blvd near the Railroad Trussel.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Hail and Damaging Winds in North Dakota, September 4, 2023$367,000 · 1.25 in hail · 23 events
- Hail and Damaging Winds in Missouri, September 4, 2023$120,000 · 57 kt wind · 13 events
- Wildfire in Oklahoma, September 4 to 5, 2023$95,000 · 1 event
- Heat in Texas, September 4 to 6, 202329 events
- Hail and Damaging Winds in South Dakota, September 4, 20231.75 in hail · 13 events
- Hail and Damaging Winds in South Dakota, September 4, 20231.25 in hail · 10 events
- High Wind in Wyoming, September 4, 202368 kt wind · 7 events
- Damaging Winds in Minnesota, September 4 to 5, 202369 kt wind · 7 events
- Damaging Winds in South Dakota, September 4, 202361 kt wind · 4 events
- Hail in Nebraska, September 4, 20231.5 in hail · 2 events
- Damaging Winds in Missouri, September 4, 2023$3,000 · 56 kt wind · 2 events
- Hail and Damaging Wind in Montana, September 4, 20231 in hail · 2 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1142716, 1142718, 1142719, 1142720, 1142725, 1142722, 1142727, 1142728, 1142802, 1142729, 1142731, 1142730, 1142803, 1142804.