An upper level trough brought a cold front to the region. Ahead of this cold front, moisture levels through the atmospheric column increased to above the 90th percentile for this time of year. Ample instability in place combine with the abundant moisture and lift from the frontal boundary set the stage for numerous thunderstorms producing heavy rainfall and flash flooding.

Strong Wind in LOWER TERREBONNE, LOUISIANA
From 21-JUN-21 12:16:00 to 21-JUN-21 12:16:00 (CST-6)
Magnitude: 49.00 EG
Reported by: Trained Spotter

A trained spotter reported a waterspout over marshland southwest of Dulac. This was confirmed by multiple videos from the public.

Flash Flood in ORLEANS, LOUISIANA
From 21-JUN-21 14:30:00 to 21-JUN-21 14:30:00 (CST-6)
Location: VIEUX CARRE
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

An SUV stalled out in the underpass at Marconi Drive due to high water.

Flash Flood in ORLEANS, LOUISIANA
From 21-JUN-21 15:00:00 to 21-JUN-21 15:00:00 (CST-6)
Location: VIEUX CARRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported roads to be impassable due to water 1 foot deep flowing over roadways.

Flash Flood in JEFFERSON, LOUISIANA
From 21-JUN-21 15:15:00 to 21-JUN-21 15:15:00 (CST-6)
Location: SOUTHPORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported several roads to be impassible due to high water.

Flash Flood in JEFFERSON, LOUISIANA
From 21-JUN-21 15:30:00 to 21-JUN-21 15:30:00 (CST-6)
Location: AVONDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported flood waters covering the road and encroaching on homes.

Flash Flood in JEFFERSON, LOUISIANA
From 21-JUN-21 15:30:00 to 21-JUN-21 15:30:00 (CST-6)
Location: METAIRIE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported multiple impassable roadways in Metairie.

Flash Flood in ORLEANS, LOUISIANA
From 21-JUN-21 15:30:00 to 21-JUN-21 15:30:00 (CST-6)
Location: VIEUX CARRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The Canal Boulevard underpass was impassible due to high water.

Flash Flood in ORLEANS, LOUISIANA
From 21-JUN-21 16:10:00 to 21-JUN-21 16:10:00 (CST-6)
Location: VIEUX CARRE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member reported water covering multiple streets and lawns.

Flash Flood in JEFFERSON, LOUISIANA
From 21-JUN-21 16:20:00 to 21-JUN-21 16:20:00 (CST-6)
Location: JEFFERSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several streets were flooded and water was encroaching on homes in Uptown New Orleans.

Flash Flood in ST. TAMMANY, LOUISIANA
From 21-JUN-21 17:37:00 to 21-JUN-21 17:37:00 (CST-6)
Location: NORTH SLIDELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported water several inches deep on the back patio of their house with water close to coming in.

Flash Flood in ST. TAMMANY, LOUISIANA
From 21-JUN-21 17:41:00 to 21-JUN-21 17:41:00 (CST-6)
Location: SLIDELL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of street flooding across Slidell.