Strong east-southeasterly pressure gradient flow between a strong high pressure over the mid-Atlantic and a weak surface low in the northwestern Gulf led to several days of coastal flooding across southeastern Louisiana. Reports varied from each day, with the most impacts during high tide cycles.

Coastal Flood in WESTERN ORLEANS PARISH, LOUISIANA
From 19-MAY-21 09:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Report from Orleans EOC that Venetian Isles had a few inches of water over roadways and earlier report of water over highways.

Coastal Flood in ST. JOHN THE BAPTIST, LOUISIANA
From 19-MAY-21 09:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Report of normally dry areas in Riverland Heights near Airline Highway has water seeping up from storm drains. Highway 51 was closed north of Laplace near Lake Pontchartrain and I-55 along with all on and off ramps.

Coastal Flood in ST. JAMES, LOUISIANA
From 19-MAY-21 09:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Report of many on and off ramps off of Interstate 10 and local roads were impassable, including LA 641.

Coastal Flood in ST. CHARLES, LOUISIANA
From 19-MAY-21 09:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Des Allemands and Bayou Gauche reporting very high water, with several roadways impassable.

Coastal Flood in ASCENSION, LOUISIANA
From 19-MAY-21 09:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Report of coastal flooding across Alligator Bayou and Bayou Bluff.

Coastal Flood in UPPER PLAQUEMINES, LOUISIANA
From 19-MAY-21 17:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highest water levels during previous two nights high tide cycles put about 6 inches of water on Highway 23. Typical east bank areas exposed to easterly winds had high water east of Alliance Refinery and between Jesuit Bend and Myrtle Grove. Highest water reported Thursday night between Whites Ditch and Phoenix.

Coastal Flood in SOUTHEAST ST. TAMMANY PARISH, LOUISIANA
From 19-MAY-21 17:00:00 to 22-MAY-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Report that areas around and including Bayou Liberty has water over roadways from coastal flooding.

Coastal Flood in LOWER PLAQUEMINES, LOUISIANA
From 19-MAY-21 17:00:00 to 22-MAY-21 19:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highest water levels during previous two nights high tide cycles put about 6 inches of water on Highway 23 extending down across areas of lower Plaquemines Parish.

Coastal Flood in NORTHWEST ST. TAMMANY PARISH, LOUISIANA
From 19-MAY-21 17:00:00 to 22-MAY-21 23:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Areas around Madisonville at Lakefront and one road in Lacombe reported to have water over roads.

Coastal Flood in LOWER LAFOURCHE, LOUISIANA
From 19-MAY-21 13:00:00 to 22-MAY-21 14:00:00 (CST-6)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Areas near Chackbay and Bayou Gaugue had backwater flooding.